/usr/bin/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/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:51:38,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:51:38,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:51:38,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:51:38,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:51:38,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:51:38,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:51:38,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:51:38,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:51:38,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:51:38,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:51:38,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:51:38,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:51:38,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:51:38,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:51:38,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:51:38,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:51:38,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:51:38,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:51:38,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:51:38,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:51:38,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:51:38,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:51:38,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:51:38,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:51:38,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:51:38,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:51:38,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:51:38,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:51:38,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:51:38,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:51:38,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:51:38,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:51:38,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:51:38,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:51:38,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:51:38,536 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 [2019-11-06 18:51:38,563 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:51:38,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:51:38,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:51:38,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:51:38,565 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:51:38,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:51:38,565 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:51:38,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:51:38,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:51:38,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:51:38,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:51:38,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:51:38,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:51:38,568 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:51:38,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:51:38,569 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:51:38,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:51:38,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:51:38,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:51:38,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:51:38,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:51:38,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:51:38,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:51:38,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:51:38,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:51:38,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:51:38,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:51:38,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:51:38,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:51:38,834 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:51:38,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:51:38,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:51:38,856 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:51:38,857 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:51:38,858 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2019-11-06 18:51:38,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/424d78a74/53b5b826332249f7868ee818e50f8bee/FLAG63d6ac318 [2019-11-06 18:51:39,384 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:51:39,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-2.i [2019-11-06 18:51:39,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/424d78a74/53b5b826332249f7868ee818e50f8bee/FLAG63d6ac318 [2019-11-06 18:51:39,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/424d78a74/53b5b826332249f7868ee818e50f8bee [2019-11-06 18:51:39,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:51:39,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:51:39,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:51:39,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:51:39,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:51:39,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:51:39" (1/1) ... [2019-11-06 18:51:39,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677ed351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:39, skipping insertion in model container [2019-11-06 18:51:39,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:51:39" (1/1) ... [2019-11-06 18:51:39,796 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:51:39,816 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:51:40,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:51:40,019 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:51:40,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:51:40,073 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:51:40,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:40 WrapperNode [2019-11-06 18:51:40,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:51:40,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:51:40,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:51:40,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:51:40,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:40" (1/1) ... [2019-11-06 18:51:40,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:40" (1/1) ... [2019-11-06 18:51:40,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:40" (1/1) ... [2019-11-06 18:51:40,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:40" (1/1) ... [2019-11-06 18:51:40,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:40" (1/1) ... [2019-11-06 18:51:40,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:40" (1/1) ... [2019-11-06 18:51:40,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:40" (1/1) ... [2019-11-06 18:51:40,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:51:40,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:51:40,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:51:40,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:51:40,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:40" (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 [2019-11-06 18:51:40,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:51:40,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:51:40,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:51:40,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:51:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:51:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:51:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:51:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:51:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:51:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:51:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:51:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:51:40,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:51:40,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:51:40,542 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:51:40,542 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:51:40,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:51:40 BoogieIcfgContainer [2019-11-06 18:51:40,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:51:40,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:51:40,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:51:40,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:51:40,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:51:39" (1/3) ... [2019-11-06 18:51:40,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192bc027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:51:40, skipping insertion in model container [2019-11-06 18:51:40,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:40" (2/3) ... [2019-11-06 18:51:40,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192bc027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:51:40, skipping insertion in model container [2019-11-06 18:51:40,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:51:40" (3/3) ... [2019-11-06 18:51:40,552 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2019-11-06 18:51:40,562 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:51:40,569 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:51:40,584 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:51:40,624 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:51:40,625 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:51:40,625 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:51:40,625 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:51:40,625 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:51:40,626 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:51:40,626 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:51:40,626 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:51:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-06 18:51:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:51:40,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:40,657 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:40,659 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:40,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:40,663 INFO L82 PathProgramCache]: Analyzing trace with hash -908266250, now seen corresponding path program 1 times [2019-11-06 18:51:40,670 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:40,671 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128691936] [2019-11-06 18:51:40,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:51:40,895 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128691936] [2019-11-06 18:51:40,895 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:40,896 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:51:40,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428754109] [2019-11-06 18:51:40,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:51:40,902 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:40,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:51:40,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:51:40,920 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-11-06 18:51:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:41,025 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2019-11-06 18:51:41,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:51:41,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:51:41,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:41,036 INFO L225 Difference]: With dead ends: 50 [2019-11-06 18:51:41,037 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:51:41,041 INFO L630 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 [2019-11-06 18:51:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:51:41,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-06 18:51:41,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:51:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-06 18:51:41,082 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-11-06 18:51:41,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:41,082 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-06 18:51:41,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:51:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-06 18:51:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:51:41,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:41,084 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:41,085 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1720229721, now seen corresponding path program 1 times [2019-11-06 18:51:41,086 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:41,086 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415013674] [2019-11-06 18:51:41,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:51:41,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415013674] [2019-11-06 18:51:41,156 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:41,156 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:51:41,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485091700] [2019-11-06 18:51:41,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:51:41,159 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:41,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:51:41,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:41,163 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2019-11-06 18:51:41,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:41,275 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2019-11-06 18:51:41,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:51:41,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:51:41,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:41,277 INFO L225 Difference]: With dead ends: 45 [2019-11-06 18:51:41,277 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:51:41,279 INFO L630 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 [2019-11-06 18:51:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:51:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-06 18:51:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:51:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:51:41,286 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-11-06 18:51:41,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:41,287 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:51:41,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:51:41,287 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:51:41,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:51:41,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:41,288 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:41,289 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:41,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2103920742, now seen corresponding path program 1 times [2019-11-06 18:51:41,290 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:41,290 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028593291] [2019-11-06 18:51:41,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:51:41,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028593291] [2019-11-06 18:51:41,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834954381] [2019-11-06 18:51:41,395 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 [2019-11-06 18:51:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:41,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:51:41,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:51:41,523 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:51:41,523 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 18:51:41,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163544448] [2019-11-06 18:51:41,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:51:41,524 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:41,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:51:41,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:51:41,525 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2019-11-06 18:51:41,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:41,733 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2019-11-06 18:51:41,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:51:41,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-06 18:51:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:41,736 INFO L225 Difference]: With dead ends: 61 [2019-11-06 18:51:41,737 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:51:41,738 INFO L630 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 [2019-11-06 18:51:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:51:41,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-11-06 18:51:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:51:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-11-06 18:51:41,751 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2019-11-06 18:51:41,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:41,751 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-11-06 18:51:41,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:51:41,752 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-11-06 18:51:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:51:41,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:41,754 INFO L410 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] [2019-11-06 18:51:41,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:41,959 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:41,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1242247089, now seen corresponding path program 1 times [2019-11-06 18:51:41,960 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:41,960 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056972095] [2019-11-06 18:51:41,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:51:42,143 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056972095] [2019-11-06 18:51:42,143 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598564116] [2019-11-06 18:51:42,144 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 [2019-11-06 18:51:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:42,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:51:42,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-06 18:51:42,277 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:51:42,278 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2019-11-06 18:51:42,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628409066] [2019-11-06 18:51:42,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:51:42,279 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:51:42,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:51:42,280 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 16 states. [2019-11-06 18:51:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:42,957 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2019-11-06 18:51:42,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 18:51:42,958 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2019-11-06 18:51:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:42,960 INFO L225 Difference]: With dead ends: 130 [2019-11-06 18:51:42,960 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 18:51:42,963 INFO L630 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 [2019-11-06 18:51:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 18:51:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2019-11-06 18:51:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-06 18:51:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2019-11-06 18:51:42,983 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 36 [2019-11-06 18:51:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:42,986 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2019-11-06 18:51:42,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:51:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2019-11-06 18:51:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:51:42,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:42,988 INFO L410 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] [2019-11-06 18:51:43,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:43,192 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -999025673, now seen corresponding path program 2 times [2019-11-06 18:51:43,194 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:43,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894828855] [2019-11-06 18:51:43,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:51:43,518 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894828855] [2019-11-06 18:51:43,518 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982508210] [2019-11-06 18:51:43,518 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 [2019-11-06 18:51:43,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:51:43,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:43,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:51:43,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-06 18:51:43,775 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:51:43,775 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2019-11-06 18:51:43,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222653922] [2019-11-06 18:51:43,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:51:43,779 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:51:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:51:43,781 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 27 states. [2019-11-06 18:51:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:45,195 INFO L93 Difference]: Finished difference Result 271 states and 362 transitions. [2019-11-06 18:51:45,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-06 18:51:45,195 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2019-11-06 18:51:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:45,197 INFO L225 Difference]: With dead ends: 271 [2019-11-06 18:51:45,198 INFO L226 Difference]: Without dead ends: 204 [2019-11-06 18:51:45,201 INFO L630 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 [2019-11-06 18:51:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-11-06 18:51:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 151. [2019-11-06 18:51:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-11-06 18:51:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2019-11-06 18:51:45,221 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 56 [2019-11-06 18:51:45,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:45,221 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2019-11-06 18:51:45,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:51:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2019-11-06 18:51:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 18:51:45,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:45,224 INFO L410 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] [2019-11-06 18:51:45,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:45,429 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:45,430 INFO L82 PathProgramCache]: Analyzing trace with hash 954308804, now seen corresponding path program 3 times [2019-11-06 18:51:45,430 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:45,431 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454366417] [2019-11-06 18:51:45,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-06 18:51:45,917 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454366417] [2019-11-06 18:51:45,918 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213019836] [2019-11-06 18:51:45,918 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 [2019-11-06 18:51:45,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:51:45,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:45,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:51:45,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:51:46,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:46,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [27] total 29 [2019-11-06 18:51:46,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319681277] [2019-11-06 18:51:46,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:51:46,042 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:46,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:51:46,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:51:46,043 INFO L87 Difference]: Start difference. First operand 151 states and 191 transitions. Second operand 4 states. [2019-11-06 18:51:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:46,093 INFO L93 Difference]: Finished difference Result 198 states and 251 transitions. [2019-11-06 18:51:46,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:51:46,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2019-11-06 18:51:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:46,095 INFO L225 Difference]: With dead ends: 198 [2019-11-06 18:51:46,095 INFO L226 Difference]: Without dead ends: 148 [2019-11-06 18:51:46,096 INFO L630 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 [2019-11-06 18:51:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-06 18:51:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2019-11-06 18:51:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-06 18:51:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 186 transitions. [2019-11-06 18:51:46,113 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 186 transitions. Word has length 81 [2019-11-06 18:51:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:46,114 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 186 transitions. [2019-11-06 18:51:46,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:51:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 186 transitions. [2019-11-06 18:51:46,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 18:51:46,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:46,116 INFO L410 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] [2019-11-06 18:51:46,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:46,320 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash -973963898, now seen corresponding path program 4 times [2019-11-06 18:51:46,320 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:46,320 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312906343] [2019-11-06 18:51:46,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-06 18:51:46,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312906343] [2019-11-06 18:51:46,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970640744] [2019-11-06 18:51:46,685 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 [2019-11-06 18:51:46,742 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:51:46,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:46,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:51:46,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2019-11-06 18:51:46,831 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:46,831 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25] total 27 [2019-11-06 18:51:46,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751232028] [2019-11-06 18:51:46,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:51:46,832 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:46,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:51:46,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:51:46,832 INFO L87 Difference]: Start difference. First operand 148 states and 186 transitions. Second operand 4 states. [2019-11-06 18:51:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:46,870 INFO L93 Difference]: Finished difference Result 203 states and 253 transitions. [2019-11-06 18:51:46,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:51:46,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2019-11-06 18:51:46,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:46,871 INFO L225 Difference]: With dead ends: 203 [2019-11-06 18:51:46,871 INFO L226 Difference]: Without dead ends: 138 [2019-11-06 18:51:46,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:51:46,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-06 18:51:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2019-11-06 18:51:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-06 18:51:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2019-11-06 18:51:46,884 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 81 [2019-11-06 18:51:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:46,884 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2019-11-06 18:51:46,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:51:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2019-11-06 18:51:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 18:51:46,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:46,886 INFO L410 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] [2019-11-06 18:51:47,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:47,092 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:47,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1175258490, now seen corresponding path program 5 times [2019-11-06 18:51:47,093 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:47,093 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624106895] [2019-11-06 18:51:47,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-06 18:51:47,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624106895] [2019-11-06 18:51:47,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785476425] [2019-11-06 18:51:47,289 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