java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:44:09,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:44:09,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:44:09,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:44:09,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:44:09,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:44:09,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:44:09,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:44:09,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:44:09,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:44:09,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:44:09,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:44:09,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:44:09,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:44:09,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:44:09,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:44:09,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:44:09,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:44:09,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:44:09,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:44:09,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:44:09,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:44:09,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:44:09,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:44:09,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:44:09,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:44:09,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:44:09,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:44:09,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:44:09,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:44:09,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:44:09,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:44:09,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:44:09,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:44:09,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:44:09,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:44:09,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:44:09,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:44:09,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:44:09,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:44:09,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:44:09,492 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 21:44:09,507 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:44:09,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:44:09,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:44:09,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:44:09,509 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:44:09,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:44:09,510 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:44:09,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:44:09,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:44:09,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:44:09,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:44:09,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:44:09,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:44:09,511 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:44:09,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:44:09,512 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:44:09,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:44:09,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:44:09,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:44:09,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:44:09,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:44:09,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:09,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:44:09,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:44:09,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:44:09,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:44:09,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:44:09,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:44:09,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:44:09,827 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:44:09,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:44:09,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:44:09,848 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:44:09,848 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:44:09,849 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2019-10-14 21:44:09,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6af7d5e9/7ab2661048574480956c130397e25c03/FLAGda39dc50e [2019-10-14 21:44:10,434 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:44:10,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2019-10-14 21:44:10,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6af7d5e9/7ab2661048574480956c130397e25c03/FLAGda39dc50e [2019-10-14 21:44:10,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6af7d5e9/7ab2661048574480956c130397e25c03 [2019-10-14 21:44:10,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:44:10,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:44:10,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:10,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:44:10,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:44:10,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:10" (1/1) ... [2019-10-14 21:44:10,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef43f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:10, skipping insertion in model container [2019-10-14 21:44:10,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:10" (1/1) ... [2019-10-14 21:44:10,817 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:44:10,835 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:44:11,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:11,049 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:44:11,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:11,204 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:44:11,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11 WrapperNode [2019-10-14 21:44:11,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:11,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:44:11,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:44:11,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:44:11,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:11,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:11,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:11,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:11,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:11,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:11,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:11,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:44:11,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:44:11,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:44:11,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:44:11,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (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 21:44:11,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:44:11,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:44:11,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:44:11,331 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:44:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:44:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:44:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:44:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:44:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:44:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:44:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:44:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:44:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:44:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:44:11,827 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:44:11,827 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-14 21:44:11,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:11 BoogieIcfgContainer [2019-10-14 21:44:11,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:44:11,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:44:11,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:44:11,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:44:11,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:44:10" (1/3) ... [2019-10-14 21:44:11,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395e131b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:11, skipping insertion in model container [2019-10-14 21:44:11,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (2/3) ... [2019-10-14 21:44:11,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395e131b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:11, skipping insertion in model container [2019-10-14 21:44:11,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:11" (3/3) ... [2019-10-14 21:44:11,838 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2019-10-14 21:44:11,848 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:44:11,856 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:44:11,868 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:44:11,892 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:44:11,893 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:44:11,893 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:44:11,893 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:44:11,894 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:44:11,894 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:44:11,894 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:44:11,894 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:44:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2019-10-14 21:44:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:44:11,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:11,918 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:11,920 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:11,926 INFO L82 PathProgramCache]: Analyzing trace with hash -178932642, now seen corresponding path program 1 times [2019-10-14 21:44:11,933 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:11,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487131278] [2019-10-14 21:44:11,934 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:11,934 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:11,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,137 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 21:44:12,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487131278] [2019-10-14 21:44:12,140 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:12,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:44:12,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211273416] [2019-10-14 21:44:12,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:44:12,146 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:12,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:44:12,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:12,165 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2019-10-14 21:44:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:12,392 INFO L93 Difference]: Finished difference Result 94 states and 137 transitions. [2019-10-14 21:44:12,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:44:12,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-10-14 21:44:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:12,406 INFO L225 Difference]: With dead ends: 94 [2019-10-14 21:44:12,406 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:44:12,414 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 21:44:12,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:44:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 21:44:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:44:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-10-14 21:44:12,469 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 31 [2019-10-14 21:44:12,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:12,469 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-10-14 21:44:12,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:44:12,470 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-10-14 21:44:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:44:12,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:12,471 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:12,472 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:12,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:12,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1311438022, now seen corresponding path program 1 times [2019-10-14 21:44:12,473 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:12,473 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870923127] [2019-10-14 21:44:12,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:12,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:12,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,586 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 21:44:12,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870923127] [2019-10-14 21:44:12,587 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:12,587 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:44:12,587 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142929924] [2019-10-14 21:44:12,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:44:12,589 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:12,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:44:12,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:12,590 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 4 states. [2019-10-14 21:44:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:12,765 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2019-10-14 21:44:12,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:44:12,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-10-14 21:44:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:12,768 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:44:12,768 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:44:12,770 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 21:44:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:44:12,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-10-14 21:44:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:44:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2019-10-14 21:44:12,790 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 31 [2019-10-14 21:44:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:12,791 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2019-10-14 21:44:12,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:44:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2019-10-14 21:44:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:44:12,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:12,794 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:12,796 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash -953933084, now seen corresponding path program 1 times [2019-10-14 21:44:12,798 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:12,798 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563996120] [2019-10-14 21:44:12,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:12,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:12,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:44:12,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563996120] [2019-10-14 21:44:12,928 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:12,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:44:12,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282748339] [2019-10-14 21:44:12,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:44:12,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:12,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:44:12,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:12,931 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 4 states. [2019-10-14 21:44:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:13,127 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2019-10-14 21:44:13,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:44:13,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-10-14 21:44:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:13,129 INFO L225 Difference]: With dead ends: 100 [2019-10-14 21:44:13,130 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:44:13,130 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 21:44:13,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:44:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2019-10-14 21:44:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:44:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2019-10-14 21:44:13,142 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 33 [2019-10-14 21:44:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:13,142 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2019-10-14 21:44:13,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:44:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2019-10-14 21:44:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:44:13,146 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:13,146 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:13,147 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash -753251022, now seen corresponding path program 1 times [2019-10-14 21:44:13,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:13,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024899472] [2019-10-14 21:44:13,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:13,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:13,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:44:13,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024899472] [2019-10-14 21:44:13,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141471624] [2019-10-14 21:44:13,288 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 21:44:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:44:13,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:44:13,434 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:13,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:44:13,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212554979] [2019-10-14 21:44:13,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:44:13,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:13,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:44:13,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:13,436 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 6 states. [2019-10-14 21:44:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:13,550 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2019-10-14 21:44:13,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:44:13,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2019-10-14 21:44:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:13,552 INFO L225 Difference]: With dead ends: 106 [2019-10-14 21:44:13,552 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:44:13,553 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:44:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-10-14 21:44:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:44:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2019-10-14 21:44:13,561 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 51 [2019-10-14 21:44:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:13,561 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2019-10-14 21:44:13,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:44:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2019-10-14 21:44:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:44:13,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:13,563 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:13,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:13,768 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:13,769 INFO L82 PathProgramCache]: Analyzing trace with hash 194854992, now seen corresponding path program 2 times [2019-10-14 21:44:13,769 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:13,769 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724890258] [2019-10-14 21:44:13,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:13,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:13,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:44:13,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724890258] [2019-10-14 21:44:13,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553101338] [2019-10-14 21:44:13,887 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:13,965 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:13,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:13,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:44:13,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:44:14,025 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:14,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 21:44:14,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044080206] [2019-10-14 21:44:14,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:44:14,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:14,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:44:14,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:14,029 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 8 states. [2019-10-14 21:44:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:14,333 INFO L93 Difference]: Finished difference Result 135 states and 164 transitions. [2019-10-14 21:44:14,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:44:14,333 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-10-14 21:44:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:14,335 INFO L225 Difference]: With dead ends: 135 [2019-10-14 21:44:14,335 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 21:44:14,338 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 21:44:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2019-10-14 21:44:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 21:44:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2019-10-14 21:44:14,359 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 53 [2019-10-14 21:44:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:14,359 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2019-10-14 21:44:14,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:44:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2019-10-14 21:44:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:44:14,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:14,363 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:14,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:14,567 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:14,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1331683396, now seen corresponding path program 3 times [2019-10-14 21:44:14,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:14,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768561412] [2019-10-14 21:44:14,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:14,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:14,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:44:14,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768561412] [2019-10-14 21:44:14,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936609002] [2019-10-14 21:44:14,726 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:14,817 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:44:14,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:14,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:44:14,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 21:44:14,867 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:14,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-14 21:44:14,868 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313581766] [2019-10-14 21:44:14,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:44:14,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:44:14,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:14,869 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 10 states. [2019-10-14 21:44:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:15,179 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2019-10-14 21:44:15,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:44:15,180 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2019-10-14 21:44:15,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:15,181 INFO L225 Difference]: With dead ends: 173 [2019-10-14 21:44:15,181 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 21:44:15,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 21:44:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2019-10-14 21:44:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 21:44:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2019-10-14 21:44:15,193 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 73 [2019-10-14 21:44:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:15,193 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2019-10-14 21:44:15,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:44:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2019-10-14 21:44:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-14 21:44:15,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:15,196 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:15,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:15,405 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:15,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1977892568, now seen corresponding path program 4 times [2019-10-14 21:44:15,405 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:15,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195812015] [2019-10-14 21:44:15,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:15,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:15,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:44:15,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195812015] [2019-10-14 21:44:15,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955583602] [2019-10-14 21:44:15,576 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:15,649 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:15,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:15,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:44:15,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:44:15,691 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:15,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:44:15,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733233152] [2019-10-14 21:44:15,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:44:15,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:15,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:44:15,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:15,696 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2019-10-14 21:44:15,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:15,850 INFO L93 Difference]: Finished difference Result 184 states and 204 transitions. [2019-10-14 21:44:15,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:44:15,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2019-10-14 21:44:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:15,852 INFO L225 Difference]: With dead ends: 184 [2019-10-14 21:44:15,852 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 21:44:15,853 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:15,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 21:44:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-10-14 21:44:15,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-14 21:44:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2019-10-14 21:44:15,862 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 93 [2019-10-14 21:44:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:15,863 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2019-10-14 21:44:15,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:44:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2019-10-14 21:44:15,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 21:44:15,865 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:15,865 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:16,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:16,081 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:16,082 INFO L82 PathProgramCache]: Analyzing trace with hash -102109498, now seen corresponding path program 5 times [2019-10-14 21:44:16,083 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:16,083 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130889193] [2019-10-14 21:44:16,083 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:16,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:16,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:44:16,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130889193] [2019-10-14 21:44:16,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343148372] [2019-10-14 21:44:16,246 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true