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/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:03,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:03,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:03,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:03,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:03,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:03,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:03,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:03,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:03,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:03,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:03,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:03,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:03,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:03,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:03,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:03,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:03,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:03,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:03,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:03,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:03,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:03,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:03,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:03,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:03,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:03,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:03,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:03,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:03,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:03,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:03,766 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:03,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:03,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:03,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:03,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:03,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:17:03,791 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:03,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:03,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:03,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:03,794 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:03,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:03,794 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:03,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:03,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:03,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:03,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:03,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:03,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:03,797 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:03,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:03,797 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:03,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:03,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:03,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:03,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:03,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:03,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:03,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:03,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:03,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:03,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:03,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:03,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:03,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:04,084 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:04,098 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:04,101 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:04,103 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:04,103 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:04,104 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2019-10-14 23:17:04,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48c175c7e/e57f23eb895e4efdb20b5aababe65c07/FLAG467adaf78 [2019-10-14 23:17:04,681 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:04,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2019-10-14 23:17:04,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48c175c7e/e57f23eb895e4efdb20b5aababe65c07/FLAG467adaf78 [2019-10-14 23:17:05,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48c175c7e/e57f23eb895e4efdb20b5aababe65c07 [2019-10-14 23:17:05,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:05,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:05,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:05,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:05,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:05,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:05" (1/1) ... [2019-10-14 23:17:05,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf8b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:05, skipping insertion in model container [2019-10-14 23:17:05,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:05" (1/1) ... [2019-10-14 23:17:05,124 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:05,142 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:05,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:05,399 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:05,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:05,538 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:05,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:05 WrapperNode [2019-10-14 23:17:05,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:05,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:05,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:05,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:05,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:05" (1/1) ... [2019-10-14 23:17:05,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:05" (1/1) ... [2019-10-14 23:17:05,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:05" (1/1) ... [2019-10-14 23:17:05,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:05" (1/1) ... [2019-10-14 23:17:05,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:05" (1/1) ... [2019-10-14 23:17:05,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:05" (1/1) ... [2019-10-14 23:17:05,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:05" (1/1) ... [2019-10-14 23:17:05,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:05,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:05,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:05,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:05,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:05,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-14 23:17:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:17:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-14 23:17:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:17:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:17:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:17:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:05,994 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:05,995 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 23:17:05,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:05 BoogieIcfgContainer [2019-10-14 23:17:05,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:05,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:05,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:06,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:06,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:05" (1/3) ... [2019-10-14 23:17:06,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d54b07c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:06, skipping insertion in model container [2019-10-14 23:17:06,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:05" (2/3) ... [2019-10-14 23:17:06,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d54b07c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:06, skipping insertion in model container [2019-10-14 23:17:06,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:05" (3/3) ... [2019-10-14 23:17:06,008 INFO L109 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2019-10-14 23:17:06,018 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:06,025 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:06,036 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:06,068 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:06,068 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:06,069 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:06,069 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:06,069 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:06,069 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:06,069 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:06,070 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-10-14 23:17:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:17:06,094 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:06,095 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:06,097 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:06,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2138170830, now seen corresponding path program 1 times [2019-10-14 23:17:06,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:06,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664809112] [2019-10-14 23:17:06,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:06,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:06,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:06,299 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 23:17:06,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664809112] [2019-10-14 23:17:06,301 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:06,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:17:06,302 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039521262] [2019-10-14 23:17:06,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:17:06,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:06,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:17:06,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:17:06,326 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2019-10-14 23:17:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:06,451 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2019-10-14 23:17:06,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:17:06,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-14 23:17:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:06,462 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:17:06,463 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:17:06,467 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 23:17:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:17:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-14 23:17:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:17:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-10-14 23:17:06,506 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2019-10-14 23:17:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:06,506 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-10-14 23:17:06,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:17:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-10-14 23:17:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:17:06,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:06,508 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] [2019-10-14 23:17:06,508 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1430244045, now seen corresponding path program 1 times [2019-10-14 23:17:06,509 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:06,509 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466530893] [2019-10-14 23:17:06,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:06,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:06,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:06,642 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 23:17:06,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466530893] [2019-10-14 23:17:06,644 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:06,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:17:06,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685739332] [2019-10-14 23:17:06,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:17:06,646 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:06,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:17:06,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:17:06,648 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2019-10-14 23:17:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:06,785 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2019-10-14 23:17:06,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:17:06,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-14 23:17:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:06,790 INFO L225 Difference]: With dead ends: 67 [2019-10-14 23:17:06,791 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:17:06,792 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 23:17:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:17:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2019-10-14 23:17:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:17:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-10-14 23:17:06,800 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2019-10-14 23:17:06,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:06,800 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-10-14 23:17:06,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:17:06,801 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-10-14 23:17:06,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:17:06,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:06,802 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] [2019-10-14 23:17:06,802 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:06,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:06,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1498528533, now seen corresponding path program 1 times [2019-10-14 23:17:06,803 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:06,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448220710] [2019-10-14 23:17:06,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:06,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:06,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:06,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448220710] [2019-10-14 23:17:06,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246940687] [2019-10-14 23:17:06,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:07,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:17:07,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:07,119 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 23:17:07,120 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:07,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2019-10-14 23:17:07,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806752912] [2019-10-14 23:17:07,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:07,121 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:07,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:07,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:07,122 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 6 states. [2019-10-14 23:17:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:07,179 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2019-10-14 23:17:07,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:07,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-14 23:17:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:07,181 INFO L225 Difference]: With dead ends: 55 [2019-10-14 23:17:07,181 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 23:17:07,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 23:17:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2019-10-14 23:17:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:17:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2019-10-14 23:17:07,190 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2019-10-14 23:17:07,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:07,190 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2019-10-14 23:17:07,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:07,191 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2019-10-14 23:17:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:17:07,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:07,192 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] [2019-10-14 23:17:07,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:07,396 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:07,397 INFO L82 PathProgramCache]: Analyzing trace with hash -682773586, now seen corresponding path program 1 times [2019-10-14 23:17:07,397 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:07,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047066964] [2019-10-14 23:17:07,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:07,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:07,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:17:07,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047066964] [2019-10-14 23:17:07,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802945682] [2019-10-14 23:17:07,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:07,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:17:07,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:17:07,667 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:07,667 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-10-14 23:17:07,668 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919328001] [2019-10-14 23:17:07,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:17:07,669 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:07,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:17:07,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:07,670 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 4 states. [2019-10-14 23:17:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:07,767 INFO L93 Difference]: Finished difference Result 100 states and 133 transitions. [2019-10-14 23:17:07,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:17:07,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-10-14 23:17:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:07,769 INFO L225 Difference]: With dead ends: 100 [2019-10-14 23:17:07,769 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 23:17:07,770 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:07,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 23:17:07,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2019-10-14 23:17:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:17:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2019-10-14 23:17:07,780 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 28 [2019-10-14 23:17:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:07,780 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2019-10-14 23:17:07,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:17:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2019-10-14 23:17:07,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:17:07,782 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:07,782 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:17:07,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:07,992 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:07,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1813865031, now seen corresponding path program 1 times [2019-10-14 23:17:07,992 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:07,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166542095] [2019-10-14 23:17:07,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:07,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:07,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:17:08,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166542095] [2019-10-14 23:17:08,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830521402] [2019-10-14 23:17:08,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:17:08,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:08,226 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 23:17:08,229 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:08,241 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:08,241 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:08,242 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 23:17:08,327 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 23:17:08,327 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:08,331 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:08,331 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:08,332 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 23:17:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:08,346 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:08,347 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2019-10-14 23:17:08,347 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672435957] [2019-10-14 23:17:08,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:17:08,348 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:08,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:17:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:08,350 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 12 states. [2019-10-14 23:17:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:08,662 INFO L93 Difference]: Finished difference Result 139 states and 186 transitions. [2019-10-14 23:17:08,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:17:08,662 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2019-10-14 23:17:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:08,664 INFO L225 Difference]: With dead ends: 139 [2019-10-14 23:17:08,664 INFO L226 Difference]: Without dead ends: 96 [2019-10-14 23:17:08,665 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:17:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-14 23:17:08,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 47. [2019-10-14 23:17:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:17:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2019-10-14 23:17:08,674 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 29 [2019-10-14 23:17:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:08,675 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2019-10-14 23:17:08,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:17:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2019-10-14 23:17:08,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:17:08,676 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:08,676 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:17:08,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:08,880 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:08,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1890057515, now seen corresponding path program 1 times [2019-10-14 23:17:08,882 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:08,882 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526620979] [2019-10-14 23:17:08,883 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:08,883 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:08,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:09,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526620979] [2019-10-14 23:17:09,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365909149] [2019-10-14 23:17:09,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:17:09,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:09,221 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-10-14 23:17:09,222 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:09,224 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:09,225 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:09,225 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-10-14 23:17:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:09,238 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:09,239 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2019-10-14 23:17:09,239 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666070533] [2019-10-14 23:17:09,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:17:09,240 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:09,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:17:09,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:09,240 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 13 states. [2019-10-14 23:17:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:09,628 INFO L93 Difference]: Finished difference Result 158 states and 214 transitions. [2019-10-14 23:17:09,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:17:09,628 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-10-14 23:17:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:09,630 INFO L225 Difference]: With dead ends: 158 [2019-10-14 23:17:09,631 INFO L226 Difference]: Without dead ends: 122 [2019-10-14 23:17:09,632 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:17:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-14 23:17:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 51. [2019-10-14 23:17:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:17:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2019-10-14 23:17:09,642 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 32 [2019-10-14 23:17:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:09,643 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2019-10-14 23:17:09,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:17:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2019-10-14 23:17:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:17:09,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:09,644 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:09,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:09,849 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:09,850 INFO L82 PathProgramCache]: Analyzing trace with hash 174857530, now seen corresponding path program 1 times [2019-10-14 23:17:09,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:09,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778508837] [2019-10-14 23:17:09,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:09,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:09,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:17:09,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778508837] [2019-10-14 23:17:09,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464610415] [2019-10-14 23:17:09,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:10,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:17:10,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:17:10,075 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:10,075 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2019-10-14 23:17:10,075 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705091729] [2019-10-14 23:17:10,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:10,076 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:10,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:10,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:10,079 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 10 states. [2019-10-14 23:17:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:10,533 INFO L93 Difference]: Finished difference Result 267 states and 365 transitions. [2019-10-14 23:17:10,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:17:10,534 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-10-14 23:17:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:10,535 INFO L225 Difference]: With dead ends: 267 [2019-10-14 23:17:10,536 INFO L226 Difference]: Without dead ends: 229 [2019-10-14 23:17:10,536 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:10,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-10-14 23:17:10,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 67. [2019-10-14 23:17:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-14 23:17:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2019-10-14 23:17:10,549 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 35 [2019-10-14 23:17:10,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:10,550 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2019-10-14 23:17:10,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:10,550 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2019-10-14 23:17:10,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:17:10,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:10,552 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:10,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:10,756 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1178503325, now seen corresponding path program 2 times [2019-10-14 23:17:10,758 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:10,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779722322] [2019-10-14 23:17:10,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:10,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:10,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:17:10,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779722322] [2019-10-14 23:17:10,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144419627] [2019-10-14 23:17:10,875 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:10,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:10,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:10,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 23:17:10,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:11,115 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-10-14 23:17:11,116 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:11,119 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:11,119 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:11,119 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-10-14 23:17:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:17:11,139 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:11,139 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2019-10-14 23:17:11,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170102569] [2019-10-14 23:17:11,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:17:11,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:11,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:17:11,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:17:11,145 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand 18 states. [2019-10-14 23:17:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:12,235 INFO L93 Difference]: Finished difference Result 320 states and 436 transitions. [2019-10-14 23:17:12,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:17:12,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-10-14 23:17:12,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:12,237 INFO L225 Difference]: With dead ends: 320 [2019-10-14 23:17:12,237 INFO L226 Difference]: Without dead ends: 268 [2019-10-14 23:17:12,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:17:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-10-14 23:17:12,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 82. [2019-10-14 23:17:12,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 23:17:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2019-10-14 23:17:12,252 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 39 [2019-10-14 23:17:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:12,253 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2019-10-14 23:17:12,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:17:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2019-10-14 23:17:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:17:12,254 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:12,254 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 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] [2019-10-14 23:17:12,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:12,459 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:12,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash 580109070, now seen corresponding path program 1 times [2019-10-14 23:17:12,460 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:12,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724080473] [2019-10-14 23:17:12,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 23:17:12,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724080473] [2019-10-14 23:17:12,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507275633] [2019-10-14 23:17:12,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:17:12,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 23:17:12,647 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:12,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 23:17:12,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305535536] [2019-10-14 23:17:12,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:17:12,648 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:12,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:17:12,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:12,649 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand 3 states. [2019-10-14 23:17:12,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:12,679 INFO L93 Difference]: Finished difference Result 149 states and 198 transitions. [2019-10-14 23:17:12,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:17:12,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2019-10-14 23:17:12,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:12,681 INFO L225 Difference]: With dead ends: 149 [2019-10-14 23:17:12,681 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 23:17:12,682 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:12,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 23:17:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2019-10-14 23:17:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 23:17:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 110 transitions. [2019-10-14 23:17:12,697 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 110 transitions. Word has length 42 [2019-10-14 23:17:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:12,698 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 110 transitions. [2019-10-14 23:17:12,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:17:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 110 transitions. [2019-10-14 23:17:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:17:12,702 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:12,703 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 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 23:17:12,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:12,904 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:12,905 INFO L82 PathProgramCache]: Analyzing trace with hash 46196989, now seen corresponding path program 1 times [2019-10-14 23:17:12,905 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:12,906 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909364627] [2019-10-14 23:17:12,906 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,906 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-14 23:17:13,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909364627] [2019-10-14 23:17:13,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582315062] [2019-10-14 23:17:13,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:13,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:17:13,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 23:17:13,154 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:13,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2019-10-14 23:17:13,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897654877] [2019-10-14 23:17:13,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:17:13,156 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:13,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:17:13,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:13,157 INFO L87 Difference]: Start difference. First operand 89 states and 110 transitions. Second operand 12 states. [2019-10-14 23:17:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:13,892 INFO L93 Difference]: Finished difference Result 378 states and 520 transitions. [2019-10-14 23:17:13,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:17:13,893 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-10-14 23:17:13,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:13,895 INFO L225 Difference]: With dead ends: 378 [2019-10-14 23:17:13,895 INFO L226 Difference]: Without dead ends: 321 [2019-10-14 23:17:13,897 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:17:13,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-10-14 23:17:13,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 150. [2019-10-14 23:17:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-10-14 23:17:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 191 transitions. [2019-10-14 23:17:13,919 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 191 transitions. Word has length 45 [2019-10-14 23:17:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:13,920 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 191 transitions. [2019-10-14 23:17:13,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:17:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 191 transitions. [2019-10-14 23:17:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 23:17:13,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:13,922 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 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] [2019-10-14 23:17:14,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:14,125 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:14,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:14,126 INFO L82 PathProgramCache]: Analyzing trace with hash -57035726, now seen corresponding path program 2 times [2019-10-14 23:17:14,126 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:14,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65823220] [2019-10-14 23:17:14,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 23:17:14,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65823220] [2019-10-14 23:17:14,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026170452] [2019-10-14 23:17:14,466 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:14,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:14,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:14,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:17:14,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:14,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 23:17:14,672 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:14,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2019-10-14 23:17:14,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434921884] [2019-10-14 23:17:14,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:17:14,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:14,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:17:14,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:17:14,674 INFO L87 Difference]: Start difference. First operand 150 states and 191 transitions. Second operand 17 states. [2019-10-14 23:17:16,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:16,245 INFO L93 Difference]: Finished difference Result 540 states and 716 transitions. [2019-10-14 23:17:16,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:17:16,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2019-10-14 23:17:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:16,249 INFO L225 Difference]: With dead ends: 540 [2019-10-14 23:17:16,249 INFO L226 Difference]: Without dead ends: 534 [2019-10-14 23:17:16,251 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 23:17:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2019-10-14 23:17:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 188. [2019-10-14 23:17:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-10-14 23:17:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 242 transitions. [2019-10-14 23:17:16,279 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 242 transitions. Word has length 51 [2019-10-14 23:17:16,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:16,280 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 242 transitions. [2019-10-14 23:17:16,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:17:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 242 transitions. [2019-10-14 23:17:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 23:17:16,281 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:16,282 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 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] [2019-10-14 23:17:16,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,493 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:16,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash -450062736, now seen corresponding path program 1 times [2019-10-14 23:17:16,494 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:16,494 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947750169] [2019-10-14 23:17:16,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:17,177 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 48 [2019-10-14 23:17:17,423 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 47 [2019-10-14 23:17:17,733 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 43 [2019-10-14 23:17:17,893 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 30 [2019-10-14 23:17:18,461 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 62 [2019-10-14 23:17:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 23:17:18,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947750169] [2019-10-14 23:17:18,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953470289] [2019-10-14 23:17:18,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:18,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 41 conjunts are in the unsatisfiable core [2019-10-14 23:17:18,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:18,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:18,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:18,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:19,091 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2019-10-14 23:17:19,433 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-10-14 23:17:22,800 WARN L191 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2019-10-14 23:17:23,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:23,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:23,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:23,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:23,121 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:23,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:23,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:23,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:23,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:23,137 INFO L392 ElimStorePlain]: Different costs {10=[v_prenex_9], 18=[|#memory_int|]} [2019-10-14 23:17:23,200 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:23,200 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 106 [2019-10-14 23:17:23,201 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:23,272 INFO L567 ElimStorePlain]: treesize reduction 88, result has 51.4 percent of original size [2019-10-14 23:17:23,329 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:17:23,329 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 112 [2019-10-14 23:17:23,331 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:17:23,371 INFO L567 ElimStorePlain]: treesize reduction 52, result has 35.8 percent of original size [2019-10-14 23:17:23,375 INFO L496 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:17:23,375 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 12 variables, input treesize:241, output treesize:3 [2019-10-14 23:17:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 23:17:23,440 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:23,440 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2019-10-14 23:17:23,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521835431] [2019-10-14 23:17:23,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:17:23,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:23,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:17:23,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:17:23,443 INFO L87 Difference]: Start difference. First operand 188 states and 242 transitions. Second operand 31 states. [2019-10-14 23:17:31,087 WARN L191 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2019-10-14 23:17:31,315 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 52 [2019-10-14 23:17:31,487 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2019-10-14 23:17:31,651 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2019-10-14 23:17:32,063 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 54 [2019-10-14 23:17:32,812 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2019-10-14 23:17:39,086 WARN L191 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2019-10-14 23:17:46,165 WARN L191 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2019-10-14 23:17:46,897 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 52 [2019-10-14 23:17:47,212 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2019-10-14 23:17:47,532 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44