java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:43:26,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:43:26,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:43:26,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:43:26,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:43:26,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:43:26,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:43:26,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:43:26,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:43:26,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:43:26,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:43:26,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:43:26,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:43:26,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:43:26,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:43:26,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:43:26,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:43:26,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:43:26,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:43:26,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:43:26,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:43:26,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:43:26,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:43:26,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:43:26,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:43:26,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:43:26,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:43:26,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:43:26,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:43:26,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:43:26,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:43:26,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:43:26,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:43:26,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:43:26,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:43:26,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:43:26,920 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:43:26,952 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:43:26,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:43:26,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:43:26,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:43:26,958 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:43:26,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:43:26,959 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:43:26,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:43:26,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:43:26,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:43:26,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:43:26,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:43:26,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:43:26,962 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:43:26,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:43:26,962 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:43:26,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:43:26,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:43:26,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:43:26,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:43:26,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:43:26,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:26,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:43:26,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:43:26,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:43:26,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:43:26,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:43:26,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:43:26,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:43:27,271 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:43:27,289 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:43:27,292 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:43:27,294 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:43:27,294 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:43:27,295 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2019-10-14 21:43:27,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4a95069/e11a2cf66cca41bc8d40dd94dd8e699a/FLAGe6b573efd [2019-10-14 21:43:27,778 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:43:27,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2019-10-14 21:43:27,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4a95069/e11a2cf66cca41bc8d40dd94dd8e699a/FLAGe6b573efd [2019-10-14 21:43:28,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4a95069/e11a2cf66cca41bc8d40dd94dd8e699a [2019-10-14 21:43:28,182 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:43:28,183 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:43:28,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:28,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:43:28,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:43:28,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:28" (1/1) ... [2019-10-14 21:43:28,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@247dfb19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:28, skipping insertion in model container [2019-10-14 21:43:28,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:28" (1/1) ... [2019-10-14 21:43:28,202 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:43:28,219 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:43:28,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:28,424 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:43:28,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:28,472 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:43:28,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:28 WrapperNode [2019-10-14 21:43:28,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:28,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:43:28,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:43:28,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:43:28,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:28" (1/1) ... [2019-10-14 21:43:28,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:28" (1/1) ... [2019-10-14 21:43:28,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:28" (1/1) ... [2019-10-14 21:43:28,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:28" (1/1) ... [2019-10-14 21:43:28,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:28" (1/1) ... [2019-10-14 21:43:28,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:28" (1/1) ... [2019-10-14 21:43:28,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:28" (1/1) ... [2019-10-14 21:43:28,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:43:28,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:43:28,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:43:28,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:43:28,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:28,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:43:28,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:43:28,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:43:28,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:43:28,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:43:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:43:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:43:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:43:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:43:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:43:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:43:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:43:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:43:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:43:29,038 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:43:29,038 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-14 21:43:29,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:29 BoogieIcfgContainer [2019-10-14 21:43:29,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:43:29,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:43:29,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:43:29,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:43:29,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:43:28" (1/3) ... [2019-10-14 21:43:29,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b29943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:29, skipping insertion in model container [2019-10-14 21:43:29,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:28" (2/3) ... [2019-10-14 21:43:29,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b29943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:29, skipping insertion in model container [2019-10-14 21:43:29,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:29" (3/3) ... [2019-10-14 21:43:29,046 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2019-10-14 21:43:29,054 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:43:29,061 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:43:29,073 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:43:29,106 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:43:29,106 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:43:29,106 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:43:29,107 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:43:29,107 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:43:29,107 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:43:29,107 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:43:29,107 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:43:29,132 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-10-14 21:43:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:43:29,140 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:29,142 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] [2019-10-14 21:43:29,145 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:29,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:29,151 INFO L82 PathProgramCache]: Analyzing trace with hash 772526198, now seen corresponding path program 1 times [2019-10-14 21:43:29,161 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:29,162 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024986530] [2019-10-14 21:43:29,162 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,162 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:29,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024986530] [2019-10-14 21:43:29,411 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:29,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:43:29,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197189326] [2019-10-14 21:43:29,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:43:29,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:43:29,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:29,430 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2019-10-14 21:43:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:29,576 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-10-14 21:43:29,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:43:29,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-14 21:43:29,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:29,586 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:43:29,587 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:43:29,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:43:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-14 21:43:29,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:43:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-10-14 21:43:29,629 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2019-10-14 21:43:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:29,629 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-10-14 21:43:29,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:43:29,630 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-10-14 21:43:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:43:29,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:29,631 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] [2019-10-14 21:43:29,632 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:29,632 INFO L82 PathProgramCache]: Analyzing trace with hash 514335338, now seen corresponding path program 1 times [2019-10-14 21:43:29,633 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:29,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442421712] [2019-10-14 21:43:29,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:29,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442421712] [2019-10-14 21:43:29,725 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:29,725 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:29,725 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215815346] [2019-10-14 21:43:29,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:29,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:29,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:29,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:29,728 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 4 states. [2019-10-14 21:43:29,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:29,860 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-10-14 21:43:29,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:29,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-14 21:43:29,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:29,863 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:43:29,863 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:43:29,865 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:43:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-10-14 21:43:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:43:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-10-14 21:43:29,878 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2019-10-14 21:43:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:29,878 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-10-14 21:43:29,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-10-14 21:43:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:43:29,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:29,880 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] [2019-10-14 21:43:29,880 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:29,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:29,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1148318088, now seen corresponding path program 1 times [2019-10-14 21:43:29,881 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:29,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226928030] [2019-10-14 21:43:29,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:43:29,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226928030] [2019-10-14 21:43:29,978 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:29,978 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:29,978 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650822685] [2019-10-14 21:43:29,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:29,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:29,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:29,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:29,980 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 4 states. [2019-10-14 21:43:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:30,135 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-10-14 21:43:30,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:30,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-14 21:43:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:30,137 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:43:30,137 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:43:30,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:30,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:43:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2019-10-14 21:43:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:43:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-10-14 21:43:30,163 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 27 [2019-10-14 21:43:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:30,164 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-10-14 21:43:30,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-10-14 21:43:30,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:43:30,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:30,165 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:30,166 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:30,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:30,166 INFO L82 PathProgramCache]: Analyzing trace with hash 342802812, now seen corresponding path program 1 times [2019-10-14 21:43:30,166 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:30,167 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025452349] [2019-10-14 21:43:30,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:30,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:30,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:43:30,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025452349] [2019-10-14 21:43:30,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486680477] [2019-10-14 21:43:30,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:30,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:30,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:43:30,411 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:30,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:30,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253984128] [2019-10-14 21:43:30,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:30,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:30,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:30,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:30,414 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 6 states. [2019-10-14 21:43:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:30,526 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2019-10-14 21:43:30,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:30,527 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2019-10-14 21:43:30,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:30,528 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:43:30,528 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:43:30,529 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:30,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:43:30,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-10-14 21:43:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:43:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-10-14 21:43:30,536 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 39 [2019-10-14 21:43:30,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:30,536 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-10-14 21:43:30,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-10-14 21:43:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:43:30,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:30,538 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:30,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:30,743 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:30,744 INFO L82 PathProgramCache]: Analyzing trace with hash -652688358, now seen corresponding path program 2 times [2019-10-14 21:43:30,744 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:30,745 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708171165] [2019-10-14 21:43:30,745 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:30,745 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:30,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:43:30,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708171165] [2019-10-14 21:43:30,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110701819] [2019-10-14 21:43:30,842 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:30,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:30,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:30,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:30,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:43:30,936 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:30,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:30,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643151480] [2019-10-14 21:43:30,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:30,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:30,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:30,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:30,940 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2019-10-14 21:43:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:31,125 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2019-10-14 21:43:31,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:31,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2019-10-14 21:43:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:31,130 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:43:31,130 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:43:31,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:43:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2019-10-14 21:43:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:43:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-10-14 21:43:31,149 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 41 [2019-10-14 21:43:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:31,149 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-10-14 21:43:31,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-10-14 21:43:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:43:31,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:31,151 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:31,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:31,358 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:31,359 INFO L82 PathProgramCache]: Analyzing trace with hash -291170034, now seen corresponding path program 3 times [2019-10-14 21:43:31,359 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:31,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435952264] [2019-10-14 21:43:31,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:31,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:31,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:43:31,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435952264] [2019-10-14 21:43:31,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515430613] [2019-10-14 21:43:31,456 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:31,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:43:31,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:31,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:31,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:43:31,568 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:31,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-10-14 21:43:31,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717449495] [2019-10-14 21:43:31,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:43:31,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:31,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:43:31,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:31,570 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 9 states. [2019-10-14 21:43:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:31,796 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2019-10-14 21:43:31,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:43:31,796 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2019-10-14 21:43:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:31,797 INFO L225 Difference]: With dead ends: 126 [2019-10-14 21:43:31,797 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:43:31,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:43:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2019-10-14 21:43:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:43:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2019-10-14 21:43:31,817 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 53 [2019-10-14 21:43:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:31,818 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2019-10-14 21:43:31,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:43:31,818 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2019-10-14 21:43:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:43:31,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:31,820 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:32,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:32,026 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:32,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1009666336, now seen corresponding path program 4 times [2019-10-14 21:43:32,027 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:32,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142874975] [2019-10-14 21:43:32,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:32,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:32,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-14 21:43:32,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142874975] [2019-10-14 21:43:32,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463307781] [2019-10-14 21:43:32,187 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:32,252 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:32,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:32,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:43:32,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-14 21:43:32,314 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:32,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-10-14 21:43:32,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277827445] [2019-10-14 21:43:32,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:43:32,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:32,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:43:32,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:43:32,317 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 11 states. [2019-10-14 21:43:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:32,525 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2019-10-14 21:43:32,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:43:32,526 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2019-10-14 21:43:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:32,527 INFO L225 Difference]: With dead ends: 152 [2019-10-14 21:43:32,527 INFO L226 Difference]: Without dead ends: 93 [2019-10-14 21:43:32,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:43:32,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-14 21:43:32,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2019-10-14 21:43:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:43:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2019-10-14 21:43:32,539 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 67 [2019-10-14 21:43:32,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:32,539 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2019-10-14 21:43:32,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:43:32,539 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2019-10-14 21:43:32,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:43:32,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:32,541 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:32,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:32,744 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:32,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:32,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1140158898, now seen corresponding path program 5 times [2019-10-14 21:43:32,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:32,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804297016] [2019-10-14 21:43:32,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:32,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:32,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-14 21:43:32,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804297016] [2019-10-14 21:43:32,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313434677] [2019-10-14 21:43:32,895 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true