java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/copysome1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:49:01,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:49:01,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:49:01,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:49:01,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:49:01,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:49:01,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:49:01,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:49:01,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:49:01,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:49:01,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:49:01,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:49:01,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:49:01,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:49:01,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:49:01,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:49:01,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:49:01,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:49:01,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:49:01,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:49:01,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:49:01,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:49:01,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:49:01,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:49:01,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:49:01,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:49:01,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:49:01,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:49:01,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:49:01,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:49:01,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:49:01,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:49:01,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:49:01,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:49:01,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:49:01,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:49:01,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:49:01,585 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:49:01,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:49:01,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:49:01,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:49:01,587 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:49:01,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:49:01,587 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:49:01,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:49:01,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:49:01,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:49:01,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:49:01,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:49:01,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:49:01,589 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:49:01,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:49:01,589 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:49:01,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:49:01,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:49:01,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:49:01,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:49:01,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:49:01,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:49:01,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:49:01,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:49:01,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:49:01,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:49:01,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:49:01,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:49:01,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:49:01,863 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:49:01,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:49:01,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:49:01,890 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:49:01,891 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:49:01,892 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-1.i [2019-10-14 21:49:01,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/990bcd470/14ca6638faea4b90a9c8655ba803fc34/FLAG9b39bb37a [2019-10-14 21:49:02,445 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:49:02,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i [2019-10-14 21:49:02,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/990bcd470/14ca6638faea4b90a9c8655ba803fc34/FLAG9b39bb37a [2019-10-14 21:49:02,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/990bcd470/14ca6638faea4b90a9c8655ba803fc34 [2019-10-14 21:49:02,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:49:02,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:49:02,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:02,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:49:02,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:49:02,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:02" (1/1) ... [2019-10-14 21:49:02,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d6bb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:02, skipping insertion in model container [2019-10-14 21:49:02,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:02" (1/1) ... [2019-10-14 21:49:02,873 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:49:02,887 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:49:03,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:03,055 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:49:03,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:03,097 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:49:03,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:03 WrapperNode [2019-10-14 21:49:03,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:03,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:49:03,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:49:03,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:49:03,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:03" (1/1) ... [2019-10-14 21:49:03,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:03" (1/1) ... [2019-10-14 21:49:03,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:03" (1/1) ... [2019-10-14 21:49:03,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:03" (1/1) ... [2019-10-14 21:49:03,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:03" (1/1) ... [2019-10-14 21:49:03,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:03" (1/1) ... [2019-10-14 21:49:03,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:03" (1/1) ... [2019-10-14 21:49:03,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:49:03,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:49:03,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:49:03,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:49:03,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:49:03,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:49:03,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:49:03,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:49:03,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:49:03,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:49:03,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:49:03,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:49:03,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:49:03,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:49:03,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:49:03,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:49:03,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:49:03,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:49:03,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:49:03,534 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:49:03,535 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:49:03,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:03 BoogieIcfgContainer [2019-10-14 21:49:03,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:49:03,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:49:03,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:49:03,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:49:03,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:49:02" (1/3) ... [2019-10-14 21:49:03,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc113b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:03, skipping insertion in model container [2019-10-14 21:49:03,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:03" (2/3) ... [2019-10-14 21:49:03,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc113b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:03, skipping insertion in model container [2019-10-14 21:49:03,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:03" (3/3) ... [2019-10-14 21:49:03,550 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2019-10-14 21:49:03,579 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:49:03,587 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:49:03,615 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:49:03,639 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:49:03,639 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:49:03,639 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:49:03,639 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:49:03,639 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:49:03,640 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:49:03,640 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:49:03,640 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:49:03,657 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-14 21:49:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:49:03,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:03,665 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:03,667 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash -908266250, now seen corresponding path program 1 times [2019-10-14 21:49:03,681 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:03,682 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606207510] [2019-10-14 21:49:03,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:03,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:03,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:03,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606207510] [2019-10-14 21:49:03,855 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:03,855 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:49:03,856 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443505027] [2019-10-14 21:49:03,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:49:03,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:03,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:49:03,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:03,874 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-10-14 21:49:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:03,987 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2019-10-14 21:49:03,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:49:03,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:49:03,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:03,997 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:49:03,997 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:49:04,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:49:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 21:49:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:49:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-14 21:49:04,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-10-14 21:49:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:04,039 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-14 21:49:04,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:49:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-14 21:49:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:49:04,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:04,040 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:04,041 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:04,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1720229721, now seen corresponding path program 1 times [2019-10-14 21:49:04,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:04,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769514047] [2019-10-14 21:49:04,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:04,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:04,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:04,133 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769514047] [2019-10-14 21:49:04,133 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:04,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:49:04,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835642486] [2019-10-14 21:49:04,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:04,140 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:04,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:04,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:04,141 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2019-10-14 21:49:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:04,248 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2019-10-14 21:49:04,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:04,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:49:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:04,249 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:49:04,250 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:49:04,251 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:49:04,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-10-14 21:49:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:49:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 21:49:04,258 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-10-14 21:49:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:04,259 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 21:49:04,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 21:49:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:49:04,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:04,260 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:04,260 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:04,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2103920742, now seen corresponding path program 1 times [2019-10-14 21:49:04,261 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:04,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428422096] [2019-10-14 21:49:04,262 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:04,262 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:04,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:49:04,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428422096] [2019-10-14 21:49:04,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70717148] [2019-10-14 21:49:04,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:04,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:04,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:49:04,507 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:04,507 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 21:49:04,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508995573] [2019-10-14 21:49:04,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:49:04,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:49:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:49:04,509 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2019-10-14 21:49:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:04,724 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2019-10-14 21:49:04,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:49:04,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-10-14 21:49:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:04,727 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:49:04,727 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:49:04,728 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:49:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:49:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-10-14 21:49:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:49:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-10-14 21:49:04,737 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2019-10-14 21:49:04,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:04,738 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-10-14 21:49:04,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:49:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-10-14 21:49:04,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:49:04,739 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:04,740 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:04,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:04,945 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:04,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1242247089, now seen corresponding path program 1 times [2019-10-14 21:49:04,946 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:04,946 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839237441] [2019-10-14 21:49:04,947 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:04,947 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:04,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:49:05,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839237441] [2019-10-14 21:49:05,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977366419] [2019-10-14 21:49:05,122 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 21:49:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:05,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:49:05,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:49:05,244 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:05,244 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2019-10-14 21:49:05,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51460319] [2019-10-14 21:49:05,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:49:05,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:05,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:49:05,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:49:05,246 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 16 states. [2019-10-14 21:49:05,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:05,937 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2019-10-14 21:49:05,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:49:05,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2019-10-14 21:49:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:05,942 INFO L225 Difference]: With dead ends: 130 [2019-10-14 21:49:05,942 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 21:49:05,944 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:49:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 21:49:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2019-10-14 21:49:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:49:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2019-10-14 21:49:05,969 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 36 [2019-10-14 21:49:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:05,970 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2019-10-14 21:49:05,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:49:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2019-10-14 21:49:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:49:05,973 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:05,974 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:06,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:06,189 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:06,189 INFO L82 PathProgramCache]: Analyzing trace with hash -999025673, now seen corresponding path program 2 times [2019-10-14 21:49:06,190 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:06,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700398996] [2019-10-14 21:49:06,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:06,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:06,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:49:06,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700398996] [2019-10-14 21:49:06,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562859673] [2019-10-14 21:49:06,514 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 21:49:06,578 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:49:06,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:06,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:49:06,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 21:49:06,750 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:06,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2019-10-14 21:49:06,751 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867001615] [2019-10-14 21:49:06,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:49:06,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:06,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:49:06,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:49:06,753 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 27 states. [2019-10-14 21:49:08,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:08,183 INFO L93 Difference]: Finished difference Result 271 states and 362 transitions. [2019-10-14 21:49:08,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-14 21:49:08,184 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2019-10-14 21:49:08,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:08,186 INFO L225 Difference]: With dead ends: 271 [2019-10-14 21:49:08,186 INFO L226 Difference]: Without dead ends: 204 [2019-10-14 21:49:08,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1145, Invalid=3145, Unknown=0, NotChecked=0, Total=4290 [2019-10-14 21:49:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-10-14 21:49:08,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 151. [2019-10-14 21:49:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-14 21:49:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2019-10-14 21:49:08,210 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 56 [2019-10-14 21:49:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:08,211 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2019-10-14 21:49:08,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:49:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2019-10-14 21:49:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:49:08,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:08,214 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:08,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:08,417 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:08,418 INFO L82 PathProgramCache]: Analyzing trace with hash 954308804, now seen corresponding path program 3 times [2019-10-14 21:49:08,419 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:08,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188681370] [2019-10-14 21:49:08,419 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:08,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:08,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-14 21:49:08,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188681370] [2019-10-14 21:49:08,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779905991] [2019-10-14 21:49:08,833 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 21:49:08,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:49:08,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:08,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:08,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:49:08,956 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:08,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [27] total 29 [2019-10-14 21:49:08,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962710375] [2019-10-14 21:49:08,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:08,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:08,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:08,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:49:08,959 INFO L87 Difference]: Start difference. First operand 151 states and 191 transitions. Second operand 4 states. [2019-10-14 21:49:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:09,007 INFO L93 Difference]: Finished difference Result 198 states and 251 transitions. [2019-10-14 21:49:09,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:09,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2019-10-14 21:49:09,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:09,010 INFO L225 Difference]: With dead ends: 198 [2019-10-14 21:49:09,010 INFO L226 Difference]: Without dead ends: 148 [2019-10-14 21:49:09,012 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:49:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-10-14 21:49:09,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2019-10-14 21:49:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-10-14 21:49:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 186 transitions. [2019-10-14 21:49:09,040 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 186 transitions. Word has length 81 [2019-10-14 21:49:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:09,040 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 186 transitions. [2019-10-14 21:49:09,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 186 transitions. [2019-10-14 21:49:09,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:49:09,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:09,043 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:09,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:09,246 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:09,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:09,247 INFO L82 PathProgramCache]: Analyzing trace with hash -973963898, now seen corresponding path program 4 times [2019-10-14 21:49:09,247 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:09,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892687488] [2019-10-14 21:49:09,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:09,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:09,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-14 21:49:09,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892687488] [2019-10-14 21:49:09,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613294112] [2019-10-14 21:49:09,670 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 21:49:09,719 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:49:09,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:09,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:09,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2019-10-14 21:49:09,786 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:09,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25] total 27 [2019-10-14 21:49:09,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200966269] [2019-10-14 21:49:09,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:09,787 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:09,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:09,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:49:09,788 INFO L87 Difference]: Start difference. First operand 148 states and 186 transitions. Second operand 4 states. [2019-10-14 21:49:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:09,818 INFO L93 Difference]: Finished difference Result 208 states and 260 transitions. [2019-10-14 21:49:09,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:09,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2019-10-14 21:49:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:09,821 INFO L225 Difference]: With dead ends: 208 [2019-10-14 21:49:09,821 INFO L226 Difference]: Without dead ends: 143 [2019-10-14 21:49:09,822 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:49:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-10-14 21:49:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 121. [2019-10-14 21:49:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 21:49:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2019-10-14 21:49:09,838 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 81 [2019-10-14 21:49:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:09,838 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2019-10-14 21:49:09,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2019-10-14 21:49:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:49:09,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:09,841 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:10,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:10,052 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:10,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1175258490, now seen corresponding path program 5 times [2019-10-14 21:49:10,053 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:10,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384695866] [2019-10-14 21:49:10,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:10,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:10,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-14 21:49:10,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384695866] [2019-10-14 21:49:10,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630135434] [2019-10-14 21:49:10,255 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