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/reducercommutativity/sep10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:54,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:54,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:54,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:54,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:54,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:54,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:54,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:54,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:54,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:54,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:54,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:54,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:54,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:54,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:54,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:54,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:54,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:54,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:54,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:54,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:54,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:54,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:54,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:54,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:42:54,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:42:54,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:42:54,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:42:54,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:42:54,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:42:54,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:42:54,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:42:54,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:42:54,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:54,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:54,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:54,468 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 23:42:54,494 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:54,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:54,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:54,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:54,499 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:54,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:54,500 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:54,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:54,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:54,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:54,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:54,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:54,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:54,503 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:54,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:54,503 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:54,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:54,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:54,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:54,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:54,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:54,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:54,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:54,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:54,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:54,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:54,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:54,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:54,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:54,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:54,810 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:54,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:54,817 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:54,817 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:54,818 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-10-14 23:42:54,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5126c057a/1fe4b3e9030b4640b419e5352ea933a5/FLAG3292612df [2019-10-14 23:42:55,375 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:55,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-10-14 23:42:55,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5126c057a/1fe4b3e9030b4640b419e5352ea933a5/FLAG3292612df [2019-10-14 23:42:55,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5126c057a/1fe4b3e9030b4640b419e5352ea933a5 [2019-10-14 23:42:55,752 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:55,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:55,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:55,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:55,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:55,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:55" (1/1) ... [2019-10-14 23:42:55,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fe0b11d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55, skipping insertion in model container [2019-10-14 23:42:55,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:55" (1/1) ... [2019-10-14 23:42:55,772 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:55,794 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:56,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:56,016 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:56,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:56,056 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:56,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:56 WrapperNode [2019-10-14 23:42:56,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:56,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:56,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:56,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:56,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:56" (1/1) ... [2019-10-14 23:42:56,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:56" (1/1) ... [2019-10-14 23:42:56,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:56" (1/1) ... [2019-10-14 23:42:56,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:56" (1/1) ... [2019-10-14 23:42:56,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:56" (1/1) ... [2019-10-14 23:42:56,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:56" (1/1) ... [2019-10-14 23:42:56,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:56" (1/1) ... [2019-10-14 23:42:56,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:56,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:56,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:56,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:56,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:56" (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 23:42:56,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:56,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:56,238 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-14 23:42:56,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-14 23:42:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:56,527 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:56,528 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:42:56,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:56 BoogieIcfgContainer [2019-10-14 23:42:56,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:56,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:56,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:56,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:56,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:55" (1/3) ... [2019-10-14 23:42:56,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be50dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:56, skipping insertion in model container [2019-10-14 23:42:56,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:56" (2/3) ... [2019-10-14 23:42:56,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be50dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:56, skipping insertion in model container [2019-10-14 23:42:56,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:56" (3/3) ... [2019-10-14 23:42:56,539 INFO L109 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2019-10-14 23:42:56,552 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:56,561 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:56,574 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:56,600 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:56,600 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:56,600 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:56,601 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:56,601 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:56,601 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:56,601 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:56,601 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 23:42:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:56,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:56,628 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:56,630 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:56,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:56,635 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-10-14 23:42:56,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:56,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210268065] [2019-10-14 23:42:56,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:56,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210268065] [2019-10-14 23:42:56,848 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:56,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:42:56,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767736935] [2019-10-14 23:42:56,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:56,853 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:56,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:56,870 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 23:42:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:56,976 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-10-14 23:42:56,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:56,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:42:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:56,989 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:42:56,990 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:42:56,994 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 23:42:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:42:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:42:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:42:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 23:42:57,038 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-10-14 23:42:57,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:57,039 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 23:42:57,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:57,039 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 23:42:57,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:57,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:57,042 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:57,043 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:57,043 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-10-14 23:42:57,044 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:57,044 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515751849] [2019-10-14 23:42:57,045 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,045 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:42:57,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515751849] [2019-10-14 23:42:57,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416402924] [2019-10-14 23:42:57,237 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 23:42:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:57,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:57,346 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:57,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 23:42:57,347 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140007865] [2019-10-14 23:42:57,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:57,349 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:57,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:57,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:57,350 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-14 23:42:57,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:57,366 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-14 23:42:57,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:57,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:42:57,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:57,368 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:42:57,368 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:42:57,370 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:42:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 23:42:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:42:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 23:42:57,378 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-10-14 23:42:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:57,378 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 23:42:57,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 23:42:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:42:57,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:57,380 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:57,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,585 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:57,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:57,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-10-14 23:42:57,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:57,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50146758] [2019-10-14 23:42:57,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:42:57,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50146758] [2019-10-14 23:42:57,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792955488] [2019-10-14 23:42:57,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:57,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:42:57,791 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:57,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 23:42:57,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792159058] [2019-10-14 23:42:57,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:57,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:57,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:57,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:57,793 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-10-14 23:42:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:57,823 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-10-14 23:42:57,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:57,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 23:42:57,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:57,825 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:42:57,825 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:42:57,826 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 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 23:42:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:42:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-14 23:42:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:42:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 23:42:57,833 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-10-14 23:42:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:57,835 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 23:42:57,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 23:42:57,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:42:57,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:57,837 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:42:58,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:58,038 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:58,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-10-14 23:42:58,039 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:58,039 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098959699] [2019-10-14 23:42:58,039 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,039 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:58,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098959699] [2019-10-14 23:42:58,194 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:58,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:58,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532565550] [2019-10-14 23:42:58,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:58,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:58,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:58,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:58,196 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 4 states. [2019-10-14 23:42:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:58,279 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-14 23:42:58,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:58,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-14 23:42:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:58,280 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:42:58,281 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:42:58,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 23:42:58,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:42:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-14 23:42:58,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:42:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 23:42:58,288 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-10-14 23:42:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:58,290 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 23:42:58,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 23:42:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:42:58,292 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:58,292 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:42:58,293 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:58,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-10-14 23:42:58,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:58,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577466194] [2019-10-14 23:42:58,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:58,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577466194] [2019-10-14 23:42:58,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360404036] [2019-10-14 23:42:58,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:42:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:58,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:58,562 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:58,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:42:58,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613803917] [2019-10-14 23:42:58,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:58,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:58,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:58,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:58,566 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2019-10-14 23:42:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:58,657 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-10-14 23:42:58,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:58,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-10-14 23:42:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:58,659 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:42:58,659 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:42:58,660 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 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 23:42:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:42:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-14 23:42:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:42:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-10-14 23:42:58,667 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 45 [2019-10-14 23:42:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:58,667 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-10-14 23:42:58,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-10-14 23:42:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:42:58,669 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:58,669 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 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 23:42:58,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:58,870 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:58,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1356401117, now seen corresponding path program 2 times [2019-10-14 23:42:58,871 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:58,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575561249] [2019-10-14 23:42:58,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:58,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575561249] [2019-10-14 23:42:58,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166483868] [2019-10-14 23:42:58,983 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 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 23:42:59,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:59,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:59,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:59,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:59,077 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:59,078 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:42:59,078 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171279345] [2019-10-14 23:42:59,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:59,079 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:59,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:59,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:59,079 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2019-10-14 23:42:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:59,179 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-14 23:42:59,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:59,179 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-10-14 23:42:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:59,180 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:42:59,180 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:42:59,181 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 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 23:42:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:42:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 23:42:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:42:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-10-14 23:42:59,187 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 47 [2019-10-14 23:42:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:59,188 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-10-14 23:42:59,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:59,188 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-10-14 23:42:59,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:42:59,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:59,190 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:42:59,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,401 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:59,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:59,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1005160965, now seen corresponding path program 3 times [2019-10-14 23:42:59,402 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:59,402 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677176476] [2019-10-14 23:42:59,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:59,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677176476] [2019-10-14 23:42:59,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843077086] [2019-10-14 23:42:59,537 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,611 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:42:59,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:59,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:59,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:42:59,662 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:59,662 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 23:42:59,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110603228] [2019-10-14 23:42:59,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:59,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:59,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:59,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:59,665 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2019-10-14 23:42:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:59,834 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2019-10-14 23:42:59,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:59,835 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-10-14 23:42:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:59,836 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:42:59,837 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:42:59,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:42:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-10-14 23:42:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:42:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-14 23:42:59,850 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 49 [2019-10-14 23:42:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:59,850 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-14 23:42:59,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:59,851 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-14 23:42:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 23:42:59,852 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:59,853 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 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] [2019-10-14 23:43:00,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,056 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:00,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:00,056 INFO L82 PathProgramCache]: Analyzing trace with hash 742022364, now seen corresponding path program 4 times [2019-10-14 23:43:00,056 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:00,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205587981] [2019-10-14 23:43:00,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:43:00,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205587981] [2019-10-14 23:43:00,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270888622] [2019-10-14 23:43:00,160 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,215 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:00,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:00,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:00,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-14 23:43:00,261 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:00,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 23:43:00,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407699441] [2019-10-14 23:43:00,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:43:00,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:00,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:43:00,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:00,269 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2019-10-14 23:43:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:00,467 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2019-10-14 23:43:00,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:43:00,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2019-10-14 23:43:00,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:00,468 INFO L225 Difference]: With dead ends: 71 [2019-10-14 23:43:00,469 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:43:00,469 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:43:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:43:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-10-14 23:43:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:43:00,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-10-14 23:43:00,481 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 60 [2019-10-14 23:43:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:00,481 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-10-14 23:43:00,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:43:00,482 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-10-14 23:43:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 23:43:00,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:00,487 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 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] [2019-10-14 23:43:00,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,688 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash -535819369, now seen corresponding path program 5 times [2019-10-14 23:43:00,690 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:00,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036140628] [2019-10-14 23:43:00,690 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,690 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-14 23:43:00,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036140628] [2019-10-14 23:43:00,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113461975] [2019-10-14 23:43:00,838 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,949 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 23:43:00,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:00,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:00,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 23:43:01,019 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:01,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-14 23:43:01,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200600301] [2019-10-14 23:43:01,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:43:01,020 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:01,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:43:01,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:01,024 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 13 states. [2019-10-14 23:43:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:01,217 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2019-10-14 23:43:01,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:43:01,218 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-10-14 23:43:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:01,219 INFO L225 Difference]: With dead ends: 79 [2019-10-14 23:43:01,219 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:43:01,220 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:43:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:43:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-14 23:43:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:43:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-10-14 23:43:01,227 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 71 [2019-10-14 23:43:01,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:01,227 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-10-14 23:43:01,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:43:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-10-14 23:43:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 23:43:01,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:01,229 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 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] [2019-10-14 23:43:01,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:01,441 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:01,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:01,441 INFO L82 PathProgramCache]: Analyzing trace with hash 778847808, now seen corresponding path program 6 times [2019-10-14 23:43:01,442 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:01,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893023611] [2019-10-14 23:43:01,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-10-14 23:43:01,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893023611] [2019-10-14 23:43:01,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390377826] [2019-10-14 23:43:01,599 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:01,692 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 23:43:01,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:01,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:01,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 122 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-10-14 23:43:01,757 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:01,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-10-14 23:43:01,758 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702400461] [2019-10-14 23:43:01,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:01,759 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:01,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:01,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:01,760 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 12 states. [2019-10-14 23:43:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:01,965 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2019-10-14 23:43:01,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:01,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2019-10-14 23:43:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:01,967 INFO L225 Difference]: With dead ends: 85 [2019-10-14 23:43:01,967 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:43:01,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:43:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-10-14 23:43:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 23:43:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-10-14 23:43:01,981 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 82 [2019-10-14 23:43:01,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:01,981 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-10-14 23:43:01,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-10-14 23:43:01,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 23:43:01,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:01,984 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:02,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,196 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash 27018272, now seen corresponding path program 7 times [2019-10-14 23:43:02,197 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:02,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786462553] [2019-10-14 23:43:02,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:02,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786462553] [2019-10-14 23:43:02,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473003015] [2019-10-14 23:43:02,350 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:02,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:02,449 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:02,449 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:43:02,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110728831] [2019-10-14 23:43:02,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:02,451 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:02,451 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 12 states. [2019-10-14 23:43:02,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:02,541 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2019-10-14 23:43:02,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:43:02,541 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2019-10-14 23:43:02,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:02,542 INFO L225 Difference]: With dead ends: 88 [2019-10-14 23:43:02,543 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 23:43:02,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 23:43:02,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-10-14 23:43:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 23:43:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-10-14 23:43:02,560 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 86 [2019-10-14 23:43:02,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:02,560 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-10-14 23:43:02,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:02,561 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-10-14 23:43:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 23:43:02,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:02,565 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:02,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,771 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:02,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:02,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1793036866, now seen corresponding path program 8 times [2019-10-14 23:43:02,771 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:02,772 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249628631] [2019-10-14 23:43:02,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:02,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249628631] [2019-10-14 23:43:02,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767521661] [2019-10-14 23:43:02,935 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:03,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:03,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:03,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:03,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:03,051 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:03,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:43:03,052 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382506987] [2019-10-14 23:43:03,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:43:03,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:03,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:43:03,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:03,056 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 13 states. [2019-10-14 23:43:03,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:03,192 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-10-14 23:43:03,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:03,192 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2019-10-14 23:43:03,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:03,194 INFO L225 Difference]: With dead ends: 90 [2019-10-14 23:43:03,194 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 23:43:03,195 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 23:43:03,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-14 23:43:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:43:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-10-14 23:43:03,206 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 88 [2019-10-14 23:43:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:03,206 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-10-14 23:43:03,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:43:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-10-14 23:43:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 23:43:03,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:03,208 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:03,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:03,421 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:03,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1870143516, now seen corresponding path program 9 times [2019-10-14 23:43:03,422 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:03,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956352334] [2019-10-14 23:43:03,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:03,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:03,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:03,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956352334] [2019-10-14 23:43:03,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325777805] [2019-10-14 23:43:03,589 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:03,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:43:03,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:03,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:03,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 122 proven. 4 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2019-10-14 23:43:03,699 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:03,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 23:43:03,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398416629] [2019-10-14 23:43:03,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:43:03,700 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:43:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:43:03,701 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 16 states. [2019-10-14 23:43:03,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:03,875 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2019-10-14 23:43:03,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:43:03,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2019-10-14 23:43:03,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:03,876 INFO L225 Difference]: With dead ends: 94 [2019-10-14 23:43:03,876 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:43:03,877 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:43:03,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:43:03,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-10-14 23:43:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:43:03,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-10-14 23:43:03,883 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 90 [2019-10-14 23:43:03,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:03,883 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-10-14 23:43:03,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:43:03,884 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-10-14 23:43:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 23:43:03,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:03,885 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 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] [2019-10-14 23:43:04,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:04,089 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:04,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1573371196, now seen corresponding path program 10 times [2019-10-14 23:43:04,090 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:04,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257548909] [2019-10-14 23:43:04,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:04,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:04,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-10-14 23:43:04,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257548909] [2019-10-14 23:43:04,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107521059] [2019-10-14 23:43:04,244 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:04,321 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:04,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:04,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:04,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-14 23:43:04,357 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:04,357 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-10-14 23:43:04,357 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446971808] [2019-10-14 23:43:04,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:43:04,359 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:04,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:43:04,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:43:04,359 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 8 states. [2019-10-14 23:43:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:04,510 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2019-10-14 23:43:04,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:43:04,511 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2019-10-14 23:43:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:04,512 INFO L225 Difference]: With dead ends: 99 [2019-10-14 23:43:04,512 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 23:43:04,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 23:43:04,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-10-14 23:43:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 23:43:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-10-14 23:43:04,520 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 94 [2019-10-14 23:43:04,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:04,521 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-10-14 23:43:04,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:43:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-10-14 23:43:04,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 23:43:04,522 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:04,522 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 10, 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] [2019-10-14 23:43:04,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:04,728 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:04,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:04,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2058184687, now seen corresponding path program 11 times [2019-10-14 23:43:04,728 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:04,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310686369] [2019-10-14 23:43:04,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:04,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:04,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-14 23:43:04,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310686369] [2019-10-14 23:43:04,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696523861] [2019-10-14 23:43:04,905 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:05,273 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-14 23:43:05,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:05,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:43:05,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 174 proven. 35 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-14 23:43:05,291 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:05,292 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2019-10-14 23:43:05,292 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009509978] [2019-10-14 23:43:05,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:43:05,293 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:05,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:43:05,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:05,293 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 9 states. [2019-10-14 23:43:05,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:05,477 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2019-10-14 23:43:05,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:43:05,477 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 103 [2019-10-14 23:43:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:05,478 INFO L225 Difference]: With dead ends: 105 [2019-10-14 23:43:05,478 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 23:43:05,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 23:43:05,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-10-14 23:43:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-14 23:43:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2019-10-14 23:43:05,485 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 103 [2019-10-14 23:43:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:05,485 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2019-10-14 23:43:05,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:43:05,486 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2019-10-14 23:43:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 23:43:05,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:05,487 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 10, 10, 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] [2019-10-14 23:43:05,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:05,688 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:05,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1611383708, now seen corresponding path program 12 times [2019-10-14 23:43:05,689 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:05,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832755903] [2019-10-14 23:43:05,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:05,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:05,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 124 proven. 175 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-10-14 23:43:05,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832755903] [2019-10-14 23:43:05,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049947823] [2019-10-14 23:43:05,900 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:06,015 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 23:43:06,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:06,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:06,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 250 proven. 9 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-10-14 23:43:06,073 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:06,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 23:43:06,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976302210] [2019-10-14 23:43:06,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:43:06,075 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:06,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:43:06,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:43:06,075 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 14 states. [2019-10-14 23:43:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:06,328 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2019-10-14 23:43:06,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:43:06,328 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 112 [2019-10-14 23:43:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:06,329 INFO L225 Difference]: With dead ends: 114 [2019-10-14 23:43:06,330 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 23:43:06,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 23:43:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2019-10-14 23:43:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 23:43:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2019-10-14 23:43:06,337 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 112 [2019-10-14 23:43:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:06,338 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2019-10-14 23:43:06,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:43:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2019-10-14 23:43:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 23:43:06,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:06,340 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:06,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:06,541 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2115527283, now seen corresponding path program 13 times [2019-10-14 23:43:06,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:06,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750526307] [2019-10-14 23:43:06,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:06,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:06,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 165 proven. 235 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2019-10-14 23:43:06,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750526307] [2019-10-14 23:43:06,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549453540] [2019-10-14 23:43:06,753 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:06,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 326 proven. 70 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2019-10-14 23:43:06,896 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:06,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2019-10-14 23:43:06,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789509886] [2019-10-14 23:43:06,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:43:06,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:06,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:43:06,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:06,898 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 11 states. [2019-10-14 23:43:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:07,125 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2019-10-14 23:43:07,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:43:07,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 123 [2019-10-14 23:43:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:07,126 INFO L225 Difference]: With dead ends: 121 [2019-10-14 23:43:07,126 INFO L226 Difference]: Without dead ends: 77 [2019-10-14 23:43:07,127 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-14 23:43:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2019-10-14 23:43:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 23:43:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2019-10-14 23:43:07,138 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 123 [2019-10-14 23:43:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:07,139 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2019-10-14 23:43:07,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:43:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2019-10-14 23:43:07,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:43:07,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:07,145 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:07,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:07,345 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:07,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:07,346 INFO L82 PathProgramCache]: Analyzing trace with hash -638066878, now seen corresponding path program 14 times [2019-10-14 23:43:07,346 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:07,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564543774] [2019-10-14 23:43:07,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:07,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:07,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 516 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2019-10-14 23:43:07,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564543774] [2019-10-14 23:43:07,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079098503] [2019-10-14 23:43:07,551 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:07,663 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:07,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:07,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:07,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-10-14 23:43:07,685 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:07,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2019-10-14 23:43:07,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286908370] [2019-10-14 23:43:07,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:07,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:07,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:07,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:07,687 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 12 states. [2019-10-14 23:43:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:07,985 INFO L93 Difference]: Finished difference Result 127 states and 155 transitions. [2019-10-14 23:43:07,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:07,986 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 132 [2019-10-14 23:43:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:07,987 INFO L225 Difference]: With dead ends: 127 [2019-10-14 23:43:07,987 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:43:07,987 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:43:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-10-14 23:43:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 23:43:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2019-10-14 23:43:07,992 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 132 [2019-10-14 23:43:07,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:07,992 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2019-10-14 23:43:07,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2019-10-14 23:43:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 23:43:07,994 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:07,994 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:08,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:08,198 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:08,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:08,199 INFO L82 PathProgramCache]: Analyzing trace with hash -720039853, now seen corresponding path program 15 times [2019-10-14 23:43:08,199 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:08,199 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326613724] [2019-10-14 23:43:08,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:08,200 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:08,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 265 proven. 382 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2019-10-14 23:43:08,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326613724] [2019-10-14 23:43:08,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802648012] [2019-10-14 23:43:08,459 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:08,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:43:08,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:08,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:43:08,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 532 proven. 16 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2019-10-14 23:43:08,702 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:08,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2019-10-14 23:43:08,702 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817738405] [2019-10-14 23:43:08,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:43:08,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:08,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:43:08,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:08,705 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 19 states. [2019-10-14 23:43:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:09,028 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2019-10-14 23:43:09,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:43:09,029 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 141 [2019-10-14 23:43:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:09,030 INFO L225 Difference]: With dead ends: 134 [2019-10-14 23:43:09,030 INFO L226 Difference]: Without dead ends: 84 [2019-10-14 23:43:09,031 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:43:09,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-14 23:43:09,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-10-14 23:43:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 23:43:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2019-10-14 23:43:09,036 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 141 [2019-10-14 23:43:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:09,037 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2019-10-14 23:43:09,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:43:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2019-10-14 23:43:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 23:43:09,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:09,039 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:09,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:09,244 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:09,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1444910496, now seen corresponding path program 16 times [2019-10-14 23:43:09,245 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:09,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929363270] [2019-10-14 23:43:09,246 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:09,246 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:09,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-10-14 23:43:09,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929363270] [2019-10-14 23:43:09,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214148135] [2019-10-14 23:43:09,529 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:09,677 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:09,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:09,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:43:09,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 650 proven. 25 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-10-14 23:43:09,713 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:09,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 23:43:09,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727093552] [2019-10-14 23:43:09,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:43:09,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:43:09,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:43:09,715 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 10 states. [2019-10-14 23:43:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:09,817 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2019-10-14 23:43:09,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:43:09,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 152 [2019-10-14 23:43:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:09,818 INFO L225 Difference]: With dead ends: 127 [2019-10-14 23:43:09,818 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 23:43:09,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:43:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 23:43:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-10-14 23:43:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 23:43:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2019-10-14 23:43:09,824 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 152 [2019-10-14 23:43:09,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:09,824 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2019-10-14 23:43:09,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:43:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2019-10-14 23:43:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 23:43:09,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:09,826 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:10,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:10,027 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:10,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:10,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1810174302, now seen corresponding path program 17 times [2019-10-14 23:43:10,028 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:10,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524877439] [2019-10-14 23:43:10,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:10,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:10,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-10-14 23:43:10,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524877439] [2019-10-14 23:43:10,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514367850] [2019-10-14 23:43:10,273 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:11,885 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-14 23:43:11,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:11,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:43:11,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-10-14 23:43:11,934 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:11,934 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 23:43:11,935 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341830192] [2019-10-14 23:43:11,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:43:11,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:11,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:43:11,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:11,936 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 11 states. [2019-10-14 23:43:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:12,024 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2019-10-14 23:43:12,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:43:12,024 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-10-14 23:43:12,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:12,025 INFO L225 Difference]: With dead ends: 129 [2019-10-14 23:43:12,026 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 23:43:12,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 23:43:12,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2019-10-14 23:43:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-14 23:43:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2019-10-14 23:43:12,032 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 154 [2019-10-14 23:43:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:12,032 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2019-10-14 23:43:12,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:43:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2019-10-14 23:43:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:43:12,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:12,034 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:12,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:12,240 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:12,241 INFO L82 PathProgramCache]: Analyzing trace with hash 641373596, now seen corresponding path program 18 times [2019-10-14 23:43:12,241 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:12,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428312651] [2019-10-14 23:43:12,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:12,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:12,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-10-14 23:43:12,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428312651] [2019-10-14 23:43:12,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372227260] [2019-10-14 23:43:12,450 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:12,765 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 23:43:12,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:12,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:43:12,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 650 proven. 49 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-10-14 23:43:12,804 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:12,804 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:43:12,804 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70891848] [2019-10-14 23:43:12,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:12,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:12,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:12,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:12,806 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand 12 states. [2019-10-14 23:43:12,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:12,926 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2019-10-14 23:43:12,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:43:12,926 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 156 [2019-10-14 23:43:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:12,927 INFO L225 Difference]: With dead ends: 131 [2019-10-14 23:43:12,928 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 23:43:12,928 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 23:43:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-14 23:43:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 23:43:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2019-10-14 23:43:12,933 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 156 [2019-10-14 23:43:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:12,934 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2019-10-14 23:43:12,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2019-10-14 23:43:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-14 23:43:12,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:12,936 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:13,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,147 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:13,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1589640614, now seen corresponding path program 19 times [2019-10-14 23:43:13,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:13,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142244786] [2019-10-14 23:43:13,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-10-14 23:43:13,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142244786] [2019-10-14 23:43:13,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668558792] [2019-10-14 23:43:13,420 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:13,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 650 proven. 64 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-10-14 23:43:13,565 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:13,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:43:13,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325662141] [2019-10-14 23:43:13,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:43:13,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:13,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:43:13,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:13,569 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand 13 states. [2019-10-14 23:43:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:13,695 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2019-10-14 23:43:13,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:13,696 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 158 [2019-10-14 23:43:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:13,697 INFO L225 Difference]: With dead ends: 132 [2019-10-14 23:43:13,697 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 23:43:13,697 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 23:43:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-10-14 23:43:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 23:43:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2019-10-14 23:43:13,702 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 158 [2019-10-14 23:43:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:13,703 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2019-10-14 23:43:13,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:43:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2019-10-14 23:43:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:43:13,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:13,705 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:13,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,905 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:13,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:13,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1889351576, now seen corresponding path program 20 times [2019-10-14 23:43:13,906 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:13,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427265090] [2019-10-14 23:43:13,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2019-10-14 23:43:15,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427265090] [2019-10-14 23:43:15,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853584982] [2019-10-14 23:43:15,198 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:15,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:15,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:15,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-14 23:43:15,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:15,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:15,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:16,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-10-14 23:43:16,323 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:16,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 40] total 44 [2019-10-14 23:43:16,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146979949] [2019-10-14 23:43:16,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-14 23:43:16,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:16,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-14 23:43:16,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1778, Unknown=0, NotChecked=0, Total=1892 [2019-10-14 23:43:16,327 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand 44 states. [2019-10-14 23:43:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:19,572 INFO L93 Difference]: Finished difference Result 299 states and 417 transitions. [2019-10-14 23:43:19,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-14 23:43:19,573 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 160 [2019-10-14 23:43:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:19,580 INFO L225 Difference]: With dead ends: 299 [2019-10-14 23:43:19,580 INFO L226 Difference]: Without dead ends: 295 [2019-10-14 23:43:19,582 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 157 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=285, Invalid=5415, Unknown=0, NotChecked=0, Total=5700 [2019-10-14 23:43:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2019-10-14 23:43:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 233. [2019-10-14 23:43:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-10-14 23:43:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 299 transitions. [2019-10-14 23:43:19,629 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 299 transitions. Word has length 160 [2019-10-14 23:43:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:19,629 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 299 transitions. [2019-10-14 23:43:19,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-14 23:43:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 299 transitions. [2019-10-14 23:43:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:43:19,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:19,632 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 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] [2019-10-14 23:43:19,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:19,838 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:19,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1725557350, now seen corresponding path program 1 times [2019-10-14 23:43:19,838 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:19,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360423381] [2019-10-14 23:43:19,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:19,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:19,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 324 proven. 864 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2019-10-14 23:43:21,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360423381] [2019-10-14 23:43:21,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79572782] [2019-10-14 23:43:21,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-14 23:43:21,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:21,432 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:21,436 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2019-10-14 23:43:21,437 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:21,443 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:21,444 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:21,444 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2019-10-14 23:43:21,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:21,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:21,650 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-10-14 23:43:21,651 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:21,655 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:21,656 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:21,656 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:11 [2019-10-14 23:43:21,663 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 23:43:21,664 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:21,670 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:21,670 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:21,670 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2019-10-14 23:43:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 651 proven. 487 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2019-10-14 23:43:22,597 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:22,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 39 [2019-10-14 23:43:22,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899373962] [2019-10-14 23:43:22,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 23:43:22,598 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:22,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 23:43:22,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:43:22,599 INFO L87 Difference]: Start difference. First operand 233 states and 299 transitions. Second operand 39 states. [2019-10-14 23:43:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:31,027 INFO L93 Difference]: Finished difference Result 1266 states and 1759 transitions. [2019-10-14 23:43:31,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2019-10-14 23:43:31,028 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 160 [2019-10-14 23:43:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:31,035 INFO L225 Difference]: With dead ends: 1266 [2019-10-14 23:43:31,035 INFO L226 Difference]: Without dead ends: 956 [2019-10-14 23:43:31,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10758 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1693, Invalid=26699, Unknown=0, NotChecked=0, Total=28392 [2019-10-14 23:43:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2019-10-14 23:43:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 601. [2019-10-14 23:43:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2019-10-14 23:43:31,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 806 transitions. [2019-10-14 23:43:31,101 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 806 transitions. Word has length 160 [2019-10-14 23:43:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:31,102 INFO L462 AbstractCegarLoop]: Abstraction has 601 states and 806 transitions. [2019-10-14 23:43:31,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 23:43:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 806 transitions. [2019-10-14 23:43:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:43:31,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:31,107 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 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] [2019-10-14 23:43:31,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:31,312 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:31,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2147450282, now seen corresponding path program 2 times [2019-10-14 23:43:31,313 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:31,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975876592] [2019-10-14 23:43:31,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:31,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:31,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY