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/max10-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:28,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:28,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:28,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:28,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:28,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:28,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:28,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:28,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:28,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:28,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:28,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:28,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:28,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:28,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:28,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:28,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:28,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:28,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:28,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:28,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:28,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:28,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:28,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:28,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:42:28,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:42:28,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:42:28,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:42:28,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:42:28,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:42:28,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:42:28,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:42:28,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:42:28,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:28,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:28,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:28,698 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 23:42:28,727 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:28,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:28,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:28,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:28,729 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:28,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:28,729 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:28,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:28,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:28,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:28,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:28,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:28,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:28,731 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:28,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:28,731 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:28,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:28,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:28,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:28,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:28,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:28,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:28,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:28,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:28,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:28,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:28,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:28,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:28,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:29,018 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:29,031 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:29,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:29,036 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:29,037 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:29,037 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max10-1.i [2019-10-14 23:42:29,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442fbf521/66807e9f2faf45e4930fec7d3c6902b5/FLAG3c65be812 [2019-10-14 23:42:29,618 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:29,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max10-1.i [2019-10-14 23:42:29,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442fbf521/66807e9f2faf45e4930fec7d3c6902b5/FLAG3c65be812 [2019-10-14 23:42:29,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442fbf521/66807e9f2faf45e4930fec7d3c6902b5 [2019-10-14 23:42:29,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:29,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:29,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:29,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:29,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:29,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:29" (1/1) ... [2019-10-14 23:42:29,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43009ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:29, skipping insertion in model container [2019-10-14 23:42:29,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:29" (1/1) ... [2019-10-14 23:42:29,977 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:29,997 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:30,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:30,210 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:30,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:30,254 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:30,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30 WrapperNode [2019-10-14 23:42:30,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:30,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:30,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:30,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:30,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30" (1/1) ... [2019-10-14 23:42:30,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30" (1/1) ... [2019-10-14 23:42:30,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30" (1/1) ... [2019-10-14 23:42:30,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30" (1/1) ... [2019-10-14 23:42:30,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30" (1/1) ... [2019-10-14 23:42:30,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30" (1/1) ... [2019-10-14 23:42:30,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30" (1/1) ... [2019-10-14 23:42:30,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:30,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:30,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:30,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:30,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30" (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 23:42:30,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:30,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:30,446 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2019-10-14 23:42:30,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure max [2019-10-14 23:42:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:30,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:30,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:30,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:30,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:30,815 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:30,816 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:42:30,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:30 BoogieIcfgContainer [2019-10-14 23:42:30,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:30,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:30,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:30,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:30,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:29" (1/3) ... [2019-10-14 23:42:30,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3dfdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:30, skipping insertion in model container [2019-10-14 23:42:30,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30" (2/3) ... [2019-10-14 23:42:30,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3dfdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:30, skipping insertion in model container [2019-10-14 23:42:30,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:30" (3/3) ... [2019-10-14 23:42:30,826 INFO L109 eAbstractionObserver]: Analyzing ICFG max10-1.i [2019-10-14 23:42:30,836 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:30,842 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:30,853 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:30,881 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:30,881 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:30,881 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:30,881 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:30,882 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:30,882 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:30,882 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:30,882 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 23:42:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:30,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:30,911 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 23:42:30,913 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:30,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:30,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1379671032, now seen corresponding path program 1 times [2019-10-14 23:42:30,927 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:30,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516355934] [2019-10-14 23:42:30,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:30,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:30,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,194 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 23:42:31,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516355934] [2019-10-14 23:42:31,200 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:31,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:31,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620751077] [2019-10-14 23:42:31,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:31,207 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:31,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:31,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:31,227 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-10-14 23:42:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:31,406 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2019-10-14 23:42:31,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:31,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-14 23:42:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:31,423 INFO L225 Difference]: With dead ends: 60 [2019-10-14 23:42:31,423 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:42:31,427 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 23:42:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:42:31,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 23:42:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:42:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 23:42:31,482 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 32 [2019-10-14 23:42:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:31,483 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 23:42:31,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 23:42:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:42:31,489 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:31,490 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 23:42:31,490 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:31,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:31,491 INFO L82 PathProgramCache]: Analyzing trace with hash 551744077, now seen corresponding path program 1 times [2019-10-14 23:42:31,492 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:31,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442992843] [2019-10-14 23:42:31,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:31,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:31,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,642 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 23:42:31,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442992843] [2019-10-14 23:42:31,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465205085] [2019-10-14 23:42:31,644 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 23:42:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:31,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:31,775 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 23:42:31,776 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:31,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 23:42:31,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036798868] [2019-10-14 23:42:31,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:31,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:31,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:31,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:31,781 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-10-14 23:42:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:31,809 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2019-10-14 23:42:31,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:31,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 23:42:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:31,813 INFO L225 Difference]: With dead ends: 52 [2019-10-14 23:42:31,813 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:42:31,815 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 23:42:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:42:31,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-14 23:42:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:42:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 23:42:31,834 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 34 [2019-10-14 23:42:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:31,835 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 23:42:31,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 23:42:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:42:31,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:31,840 INFO L380 BasicCegarLoop]: trace histogram [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 23:42:32,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:32,046 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:32,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:32,049 INFO L82 PathProgramCache]: Analyzing trace with hash 727331048, now seen corresponding path program 1 times [2019-10-14 23:42:32,050 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:32,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426001174] [2019-10-14 23:42:32,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:32,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426001174] [2019-10-14 23:42:32,170 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:32,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:32,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696407954] [2019-10-14 23:42:32,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:32,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:32,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:32,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:32,174 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2019-10-14 23:42:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:32,290 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-10-14 23:42:32,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:32,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-10-14 23:42:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:32,291 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:42:32,292 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:42:32,292 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 23:42:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:42:32,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-14 23:42:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:42:32,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-14 23:42:32,299 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 46 [2019-10-14 23:42:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:32,301 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-14 23:42:32,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-14 23:42:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 23:42:32,302 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:32,302 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:32,303 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:32,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:32,303 INFO L82 PathProgramCache]: Analyzing trace with hash -270429754, now seen corresponding path program 1 times [2019-10-14 23:42:32,303 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:32,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692290987] [2019-10-14 23:42:32,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:32,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692290987] [2019-10-14 23:42:32,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727076778] [2019-10-14 23:42:32,421 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 23:42:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:32,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:32,518 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:32,518 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:42:32,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666016832] [2019-10-14 23:42:32,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:32,519 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:32,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:32,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:32,520 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2019-10-14 23:42:32,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:32,646 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-14 23:42:32,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:32,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2019-10-14 23:42:32,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:32,649 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:42:32,649 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:42:32,650 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 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 23:42:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:42:32,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 23:42:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:42:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-14 23:42:32,662 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 48 [2019-10-14 23:42:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:32,662 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-14 23:42:32,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:32,662 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-14 23:42:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:42:32,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:32,667 INFO L380 BasicCegarLoop]: trace histogram [3, 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 23:42:32,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:32,872 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:32,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:32,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1585951496, now seen corresponding path program 2 times [2019-10-14 23:42:32,873 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:32,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046457188] [2019-10-14 23:42:32,874 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:33,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046457188] [2019-10-14 23:42:33,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509526126] [2019-10-14 23:42:33,011 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 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 23:42:33,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:33,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:33,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:33,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:33,100 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:33,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:42:33,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722780081] [2019-10-14 23:42:33,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:33,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:33,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:33,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:33,102 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2019-10-14 23:42:33,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:33,199 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-10-14 23:42:33,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:33,200 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-14 23:42:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:33,201 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:42:33,201 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:42:33,202 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 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 23:42:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:42:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 23:42:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:42:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-14 23:42:33,209 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 50 [2019-10-14 23:42:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:33,209 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-14 23:42:33,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-14 23:42:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:42:33,211 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:33,211 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:33,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:33,416 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:33,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:33,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1138062390, now seen corresponding path program 3 times [2019-10-14 23:42:33,417 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:33,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083424597] [2019-10-14 23:42:33,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:33,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083424597] [2019-10-14 23:42:33,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472139385] [2019-10-14 23:42:33,567 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 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 23:42:33,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:42:33,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:33,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:33,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 23:42:33,674 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:33,674 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 23:42:33,674 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193375233] [2019-10-14 23:42:33,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:33,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:33,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:33,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:33,676 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 9 states. [2019-10-14 23:42:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:33,813 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2019-10-14 23:42:33,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:33,813 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-14 23:42:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:33,814 INFO L225 Difference]: With dead ends: 67 [2019-10-14 23:42:33,814 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:42:33,815 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 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 23:42:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:42:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-10-14 23:42:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:42:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-14 23:42:33,823 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 52 [2019-10-14 23:42:33,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:33,823 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-14 23:42:33,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:33,823 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-14 23:42:33,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:42:33,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:33,825 INFO L380 BasicCegarLoop]: trace histogram [6, 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 23:42:34,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:34,030 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:34,030 INFO L82 PathProgramCache]: Analyzing trace with hash 454933031, now seen corresponding path program 4 times [2019-10-14 23:42:34,031 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:34,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498022786] [2019-10-14 23:42:34,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 23:42:34,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498022786] [2019-10-14 23:42:34,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291713325] [2019-10-14 23:42:34,202 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 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 23:42:34,264 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:34,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:34,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:34,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 23:42:34,309 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:34,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 23:42:34,310 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154551501] [2019-10-14 23:42:34,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:42:34,311 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:34,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:42:34,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:34,312 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 11 states. [2019-10-14 23:42:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:34,516 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2019-10-14 23:42:34,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:34,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2019-10-14 23:42:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:34,517 INFO L225 Difference]: With dead ends: 77 [2019-10-14 23:42:34,517 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:42:34,518 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:42:34,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:42:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2019-10-14 23:42:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:42:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-10-14 23:42:34,526 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 66 [2019-10-14 23:42:34,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:34,526 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-10-14 23:42:34,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:42:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-10-14 23:42:34,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 23:42:34,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:34,528 INFO L380 BasicCegarLoop]: trace histogram [9, 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 23:42:34,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:34,733 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:34,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1150375548, now seen corresponding path program 5 times [2019-10-14 23:42:34,734 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:34,735 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466514508] [2019-10-14 23:42:34,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:42:34,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466514508] [2019-10-14 23:42:34,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047975089] [2019-10-14 23:42:34,883 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 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 23:42:34,991 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 23:42:34,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:34,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:34,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 88 proven. 15 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-10-14 23:42:35,049 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:35,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-14 23:42:35,049 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233719401] [2019-10-14 23:42:35,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:42:35,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:35,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:42:35,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:35,052 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 13 states. [2019-10-14 23:42:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:35,266 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2019-10-14 23:42:35,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:42:35,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2019-10-14 23:42:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:35,268 INFO L225 Difference]: With dead ends: 87 [2019-10-14 23:42:35,268 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 23:42:35,269 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 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 23:42:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 23:42:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2019-10-14 23:42:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 23:42:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-10-14 23:42:35,276 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 80 [2019-10-14 23:42:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:35,277 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-10-14 23:42:35,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:42:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-10-14 23:42:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 23:42:35,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:35,279 INFO L380 BasicCegarLoop]: trace histogram [12, 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 23:42:35,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:35,494 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:35,495 INFO L82 PathProgramCache]: Analyzing trace with hash -493553183, now seen corresponding path program 6 times [2019-10-14 23:42:35,495 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:35,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705930605] [2019-10-14 23:42:35,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:35,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:35,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2019-10-14 23:42:35,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705930605] [2019-10-14 23:42:35,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864021008] [2019-10-14 23:42:35,630 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 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 23:42:35,707 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 23:42:35,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:35,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:35,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 1 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2019-10-14 23:42:35,751 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:35,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-10-14 23:42:35,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203609397] [2019-10-14 23:42:35,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:35,755 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:35,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:35,757 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 12 states. [2019-10-14 23:42:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:35,939 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2019-10-14 23:42:35,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:35,940 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 94 [2019-10-14 23:42:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:35,941 INFO L225 Difference]: With dead ends: 93 [2019-10-14 23:42:35,941 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 23:42:35,947 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 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 23:42:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 23:42:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 23:42:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:42:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-10-14 23:42:35,964 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 94 [2019-10-14 23:42:35,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:35,964 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-10-14 23:42:35,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-10-14 23:42:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 23:42:35,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:35,969 INFO L380 BasicCegarLoop]: trace histogram [12, 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 23:42:36,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:36,170 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:36,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:36,171 INFO L82 PathProgramCache]: Analyzing trace with hash 729555201, now seen corresponding path program 7 times [2019-10-14 23:42:36,171 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:36,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484474045] [2019-10-14 23:42:36,172 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,172 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-10-14 23:42:36,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484474045] [2019-10-14 23:42:36,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883445824] [2019-10-14 23:42:36,325 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 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 23:42:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:36,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-10-14 23:42:36,438 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:36,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:42:36,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157887916] [2019-10-14 23:42:36,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:36,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:36,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:36,440 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 12 states. [2019-10-14 23:42:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:36,539 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2019-10-14 23:42:36,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:36,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 98 [2019-10-14 23:42:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:36,541 INFO L225 Difference]: With dead ends: 96 [2019-10-14 23:42:36,542 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 23:42:36,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 105 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 23:42:36,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 23:42:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-14 23:42:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 23:42:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2019-10-14 23:42:36,550 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 98 [2019-10-14 23:42:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:36,551 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2019-10-14 23:42:36,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2019-10-14 23:42:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 23:42:36,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:36,553 INFO L380 BasicCegarLoop]: trace histogram [12, 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 23:42:36,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:36,757 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:36,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:36,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1118458429, now seen corresponding path program 8 times [2019-10-14 23:42:36,758 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:36,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341565451] [2019-10-14 23:42:36,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-10-14 23:42:36,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341565451] [2019-10-14 23:42:36,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728852860] [2019-10-14 23:42:36,948 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 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 23:42:37,057 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:37,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:37,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:42:37,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-10-14 23:42:37,100 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:37,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:42:37,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356164244] [2019-10-14 23:42:37,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:42:37,102 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:42:37,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:37,103 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 13 states. [2019-10-14 23:42:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:37,256 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2019-10-14 23:42:37,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:37,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 100 [2019-10-14 23:42:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:37,257 INFO L225 Difference]: With dead ends: 98 [2019-10-14 23:42:37,257 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:42:37,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:42:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-10-14 23:42:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:42:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-10-14 23:42:37,264 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 100 [2019-10-14 23:42:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:37,264 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-10-14 23:42:37,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:42:37,264 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-10-14 23:42:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 23:42:37,265 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:37,266 INFO L380 BasicCegarLoop]: trace histogram [12, 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 23:42:37,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:37,474 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:37,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1056903685, now seen corresponding path program 9 times [2019-10-14 23:42:37,475 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:37,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382506987] [2019-10-14 23:42:37,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-10-14 23:42:37,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382506987] [2019-10-14 23:42:37,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831103331] [2019-10-14 23:42:37,631 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 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 23:42:37,701 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:42:37,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:37,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:37,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 154 proven. 4 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-10-14 23:42:37,746 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:37,747 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 23:42:37,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988738166] [2019-10-14 23:42:37,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:42:37,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:37,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:42:37,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:37,749 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 16 states. [2019-10-14 23:42:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:37,921 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2019-10-14 23:42:37,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:42:37,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 102 [2019-10-14 23:42:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:37,922 INFO L225 Difference]: With dead ends: 102 [2019-10-14 23:42:37,922 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 23:42:37,923 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 107 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 23:42:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 23:42:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-10-14 23:42:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 23:42:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2019-10-14 23:42:37,942 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 102 [2019-10-14 23:42:37,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:37,943 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2019-10-14 23:42:37,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:42:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2019-10-14 23:42:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 23:42:37,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:37,944 INFO L380 BasicCegarLoop]: trace histogram [12, 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 23:42:38,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:38,151 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:38,152 INFO L82 PathProgramCache]: Analyzing trace with hash 918576677, now seen corresponding path program 10 times [2019-10-14 23:42:38,152 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:38,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629333288] [2019-10-14 23:42:38,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 152 proven. 28 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2019-10-14 23:42:38,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629333288] [2019-10-14 23:42:38,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844291126] [2019-10-14 23:42:38,289 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 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 23:42:38,366 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:38,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:38,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:38,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 148 proven. 28 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-10-14 23:42:38,388 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:38,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-10-14 23:42:38,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280742681] [2019-10-14 23:42:38,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:42:38,391 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:38,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:42:38,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:38,392 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 8 states. [2019-10-14 23:42:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:38,566 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2019-10-14 23:42:38,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:38,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2019-10-14 23:42:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:38,568 INFO L225 Difference]: With dead ends: 109 [2019-10-14 23:42:38,568 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 23:42:38,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 119 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 23:42:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 23:42:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2019-10-14 23:42:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 23:42:38,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2019-10-14 23:42:38,580 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 106 [2019-10-14 23:42:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:38,580 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2019-10-14 23:42:38,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:42:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2019-10-14 23:42:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-14 23:42:38,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:38,582 INFO L380 BasicCegarLoop]: trace histogram [15, 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 23:42:38,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:38,788 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1038382400, now seen corresponding path program 11 times [2019-10-14 23:42:38,789 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:38,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194994977] [2019-10-14 23:42:38,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 114 proven. 159 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2019-10-14 23:42:39,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194994977] [2019-10-14 23:42:39,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006416059] [2019-10-14 23:42:39,040 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 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 23:42:39,396 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-14 23:42:39,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:39,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:39,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 224 proven. 45 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-10-14 23:42:39,452 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:39,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2019-10-14 23:42:39,453 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115433447] [2019-10-14 23:42:39,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:39,454 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:39,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:39,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:39,455 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 9 states. [2019-10-14 23:42:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:39,612 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2019-10-14 23:42:39,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:39,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 118 [2019-10-14 23:42:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:39,614 INFO L225 Difference]: With dead ends: 117 [2019-10-14 23:42:39,614 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 23:42:39,615 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 132 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 23:42:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 23:42:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-10-14 23:42:39,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:42:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2019-10-14 23:42:39,620 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 118 [2019-10-14 23:42:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:39,621 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2019-10-14 23:42:39,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2019-10-14 23:42:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 23:42:39,622 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:39,622 INFO L380 BasicCegarLoop]: trace histogram [18, 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 23:42:39,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:39,828 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:39,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:39,828 INFO L82 PathProgramCache]: Analyzing trace with hash -307697957, now seen corresponding path program 12 times [2019-10-14 23:42:39,828 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:39,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835207293] [2019-10-14 23:42:39,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 320 proven. 66 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2019-10-14 23:42:40,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835207293] [2019-10-14 23:42:40,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867313617] [2019-10-14 23:42:40,027 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 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 23:42:40,164 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 23:42:40,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:40,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:40,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 322 proven. 9 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-10-14 23:42:40,224 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:40,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 23:42:40,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40033360] [2019-10-14 23:42:40,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:42:40,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:40,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:42:40,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:42:40,227 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 14 states. [2019-10-14 23:42:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:40,486 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2019-10-14 23:42:40,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:42:40,487 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 130 [2019-10-14 23:42:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:40,488 INFO L225 Difference]: With dead ends: 128 [2019-10-14 23:42:40,488 INFO L226 Difference]: Without dead ends: 83 [2019-10-14 23:42:40,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-14 23:42:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2019-10-14 23:42:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 23:42:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2019-10-14 23:42:40,499 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 130 [2019-10-14 23:42:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:40,499 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2019-10-14 23:42:40,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:42:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2019-10-14 23:42:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-14 23:42:40,501 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:40,501 INFO L380 BasicCegarLoop]: trace histogram [21, 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 23:42:40,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:40,707 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1959206484, now seen corresponding path program 13 times [2019-10-14 23:42:40,708 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:40,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337152003] [2019-10-14 23:42:40,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 428 proven. 91 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2019-10-14 23:42:40,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337152003] [2019-10-14 23:42:40,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095301905] [2019-10-14 23:42:40,893 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 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 23:42:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:40,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 424 proven. 91 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-10-14 23:42:41,023 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:41,023 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2019-10-14 23:42:41,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341465962] [2019-10-14 23:42:41,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:42:41,024 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:42:41,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:41,025 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 11 states. [2019-10-14 23:42:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:41,253 INFO L93 Difference]: Finished difference Result 137 states and 163 transitions. [2019-10-14 23:42:41,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:41,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 144 [2019-10-14 23:42:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:41,255 INFO L225 Difference]: With dead ends: 137 [2019-10-14 23:42:41,255 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 23:42:41,256 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 160 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 23:42:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 23:42:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2019-10-14 23:42:41,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 23:42:41,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2019-10-14 23:42:41,261 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 144 [2019-10-14 23:42:41,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:41,261 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2019-10-14 23:42:41,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:42:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2019-10-14 23:42:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:42:41,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:41,263 INFO L380 BasicCegarLoop]: trace histogram [24, 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 23:42:41,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:41,464 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:41,464 INFO L82 PathProgramCache]: Analyzing trace with hash 647307887, now seen corresponding path program 14 times [2019-10-14 23:42:41,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:41,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553369965] [2019-10-14 23:42:41,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 552 proven. 120 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2019-10-14 23:42:41,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553369965] [2019-10-14 23:42:41,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591646534] [2019-10-14 23:42:41,671 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 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 23:42:41,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:41,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:41,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:42:41,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 548 proven. 120 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2019-10-14 23:42:41,807 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:41,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2019-10-14 23:42:41,807 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887772673] [2019-10-14 23:42:41,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:41,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:41,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:41,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:41,809 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 12 states. [2019-10-14 23:42:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:42,064 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2019-10-14 23:42:42,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:42,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 156 [2019-10-14 23:42:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:42,065 INFO L225 Difference]: With dead ends: 145 [2019-10-14 23:42:42,065 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 23:42:42,066 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 173 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 23:42:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 23:42:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2019-10-14 23:42:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-14 23:42:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2019-10-14 23:42:42,074 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 156 [2019-10-14 23:42:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:42,074 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2019-10-14 23:42:42,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2019-10-14 23:42:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-14 23:42:42,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:42,076 INFO L380 BasicCegarLoop]: trace histogram [27, 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 23:42:42,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,288 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1778461174, now seen corresponding path program 15 times [2019-10-14 23:42:42,289 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:42,289 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670009198] [2019-10-14 23:42:42,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 692 proven. 153 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2019-10-14 23:42:42,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670009198] [2019-10-14 23:42:42,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577635014] [2019-10-14 23:42:42,523 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 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 23:42:42,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:42:42,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:42,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:42,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 694 proven. 16 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2019-10-14 23:42:42,713 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:42,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2019-10-14 23:42:42,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548434169] [2019-10-14 23:42:42,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:42:42,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:42:42,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:42:42,715 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 18 states. [2019-10-14 23:42:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:43,060 INFO L93 Difference]: Finished difference Result 153 states and 183 transitions. [2019-10-14 23:42:43,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:42:43,061 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 168 [2019-10-14 23:42:43,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:43,062 INFO L225 Difference]: With dead ends: 153 [2019-10-14 23:42:43,062 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 23:42:43,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:42:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 23:42:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-14 23:42:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-14 23:42:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2019-10-14 23:42:43,069 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 168 [2019-10-14 23:42:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:43,069 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2019-10-14 23:42:43,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:42:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2019-10-14 23:42:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-14 23:42:43,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:43,071 INFO L380 BasicCegarLoop]: trace histogram [30, 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 23:42:43,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,284 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:43,285 INFO L82 PathProgramCache]: Analyzing trace with hash 734167171, now seen corresponding path program 16 times [2019-10-14 23:42:43,285 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:43,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092110297] [2019-10-14 23:42:43,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1945 trivial. 0 not checked. [2019-10-14 23:42:43,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092110297] [2019-10-14 23:42:43,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12522806] [2019-10-14 23:42:43,469 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 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 23:42:43,622 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:43,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:43,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:43,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 850 proven. 25 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2019-10-14 23:42:43,671 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:43,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 23:42:43,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515132073] [2019-10-14 23:42:43,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:42:43,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:43,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:42:43,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:42:43,674 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand 10 states. [2019-10-14 23:42:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:43,770 INFO L93 Difference]: Finished difference Result 147 states and 172 transitions. [2019-10-14 23:42:43,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:43,770 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 182 [2019-10-14 23:42:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:43,771 INFO L225 Difference]: With dead ends: 147 [2019-10-14 23:42:43,771 INFO L226 Difference]: Without dead ends: 96 [2019-10-14 23:42:43,772 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 189 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 23:42:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-14 23:42:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-10-14 23:42:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 23:42:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2019-10-14 23:42:43,777 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 182 [2019-10-14 23:42:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:43,777 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2019-10-14 23:42:43,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:42:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2019-10-14 23:42:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-14 23:42:43,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:43,780 INFO L380 BasicCegarLoop]: trace histogram [30, 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 23:42:43,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,984 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:43,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:43,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1063475103, now seen corresponding path program 17 times [2019-10-14 23:42:43,985 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:43,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518246711] [2019-10-14 23:42:43,985 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,985 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1945 trivial. 0 not checked. [2019-10-14 23:42:44,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518246711] [2019-10-14 23:42:44,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466015637] [2019-10-14 23:42:44,165 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 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 23:42:44,961 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-14 23:42:44,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:44,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:44,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2019-10-14 23:42:45,010 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:45,010 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 23:42:45,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050403153] [2019-10-14 23:42:45,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:42:45,013 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:45,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:42:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:45,013 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand 11 states. [2019-10-14 23:42:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:45,136 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2019-10-14 23:42:45,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:42:45,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 184 [2019-10-14 23:42:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:45,138 INFO L225 Difference]: With dead ends: 149 [2019-10-14 23:42:45,139 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 23:42:45,139 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 191 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 23:42:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 23:42:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-14 23:42:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 23:42:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2019-10-14 23:42:45,144 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 184 [2019-10-14 23:42:45,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:45,145 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2019-10-14 23:42:45,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:42:45,145 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2019-10-14 23:42:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-14 23:42:45,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:45,147 INFO L380 BasicCegarLoop]: trace histogram [30, 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 23:42:45,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:45,353 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:45,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2020847425, now seen corresponding path program 18 times [2019-10-14 23:42:45,354 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:45,354 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029337235] [2019-10-14 23:42:45,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1945 trivial. 0 not checked. [2019-10-14 23:42:45,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029337235] [2019-10-14 23:42:45,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339020240] [2019-10-14 23:42:45,523 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 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 23:42:46,351 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 23:42:46,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:46,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:46,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 850 proven. 49 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2019-10-14 23:42:46,432 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:46,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:42:46,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985104184] [2019-10-14 23:42:46,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:46,433 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:46,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:46,434 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand 12 states. [2019-10-14 23:42:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:46,543 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2019-10-14 23:42:46,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:46,544 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 186 [2019-10-14 23:42:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:46,545 INFO L225 Difference]: With dead ends: 151 [2019-10-14 23:42:46,545 INFO L226 Difference]: Without dead ends: 100 [2019-10-14 23:42:46,545 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 193 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 23:42:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-14 23:42:46,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-10-14 23:42:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 23:42:46,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2019-10-14 23:42:46,550 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 186 [2019-10-14 23:42:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:46,551 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2019-10-14 23:42:46,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2019-10-14 23:42:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-10-14 23:42:46,553 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:46,553 INFO L380 BasicCegarLoop]: trace histogram [30, 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 23:42:46,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,754 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:46,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1362319773, now seen corresponding path program 19 times [2019-10-14 23:42:46,755 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:46,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570977752] [2019-10-14 23:42:46,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2009 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1945 trivial. 0 not checked. [2019-10-14 23:42:46,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570977752] [2019-10-14 23:42:46,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268555404] [2019-10-14 23:42:46,939 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 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 23:42:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:42:47,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2009 backedges. 850 proven. 64 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2019-10-14 23:42:47,084 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:47,084 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:42:47,085 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792096210] [2019-10-14 23:42:47,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:42:47,085 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:47,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:42:47,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:47,086 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 13 states. [2019-10-14 23:42:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:47,205 INFO L93 Difference]: Finished difference Result 152 states and 177 transitions. [2019-10-14 23:42:47,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:47,206 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 188 [2019-10-14 23:42:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:47,207 INFO L225 Difference]: With dead ends: 152 [2019-10-14 23:42:47,207 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 23:42:47,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 195 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 23:42:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 23:42:47,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-10-14 23:42:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 23:42:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2019-10-14 23:42:47,212 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 188 [2019-10-14 23:42:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:47,213 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2019-10-14 23:42:47,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:42:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2019-10-14 23:42:47,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-14 23:42:47,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:47,215 INFO L380 BasicCegarLoop]: trace histogram [30, 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 23:42:47,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,416 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:47,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:47,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1295753979, now seen corresponding path program 20 times [2019-10-14 23:42:47,417 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:47,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136483544] [2019-10-14 23:42:47,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 430 proven. 1380 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-10-14 23:42:52,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136483544] [2019-10-14 23:42:52,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578319346] [2019-10-14 23:42:52,636 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 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 23:42:52,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:52,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:52,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-14 23:42:52,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:52,850 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 23:42:52,851 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:42:52,861 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:42:52,862 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 23:42:52,862 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2019-10-14 23:42:54,506 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:42:54,507 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:42:54,509 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:42:54,510 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:42:54,514 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:42:54,514 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 55 [2019-10-14 23:42:54,515 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:42:54,542 INFO L567 ElimStorePlain]: treesize reduction 25, result has 59.0 percent of original size [2019-10-14 23:42:54,544 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:42:54,544 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:33 [2019-10-14 23:42:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 903 proven. 715 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-10-14 23:42:55,871 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:55,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 36] total 98 [2019-10-14 23:42:55,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036537547] [2019-10-14 23:42:55,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-10-14 23:42:55,873 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:55,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-10-14 23:42:55,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=9209, Unknown=0, NotChecked=0, Total=9506 [2019-10-14 23:42:55,878 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 98 states.