/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:42:01,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:42:01,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:42:01,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:42:01,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:42:01,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:42:01,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:42:01,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:42:01,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:42:01,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:42:01,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:42:01,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:42:01,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:42:01,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:42:01,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:42:01,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:42:01,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:42:01,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:42:01,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:42:01,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:42:01,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:42:01,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:42:01,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:42:01,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:42:01,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 18:42:01,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 18:42:01,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 18:42:01,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 18:42:01,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 18:42:01,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 18:42:01,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:42:01,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:42:01,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:42:01,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:42:01,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:42:01,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:42:01,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:42:01,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:42:01,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:42:01,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:42:01,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:42:01,734 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:42:01,767 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:42:01,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:42:01,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:42:01,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:42:01,773 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:42:01,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:42:01,773 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:42:01,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:42:01,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:42:01,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:42:01,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:42:01,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:42:01,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:42:01,775 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:42:01,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:42:01,775 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:42:01,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:42:01,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:42:01,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:42:01,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:42:01,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:42:01,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:42:01,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:42:01,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:42:01,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:42:01,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:42:01,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:42:01,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:42:01,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:42:02,074 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:42:02,089 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:42:02,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:42:02,094 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:42:02,095 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:42:02,095 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2019-11-06 18:42:02,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ee973a5c/f2ae8b110cd24eaf8167a869f3d0e9b8/FLAGd1c8eac34 [2019-11-06 18:42:02,630 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:42:02,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2019-11-06 18:42:02,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ee973a5c/f2ae8b110cd24eaf8167a869f3d0e9b8/FLAGd1c8eac34 [2019-11-06 18:42:03,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ee973a5c/f2ae8b110cd24eaf8167a869f3d0e9b8 [2019-11-06 18:42:03,042 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:42:03,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:42:03,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:03,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:42:03,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:42:03,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:03" (1/1) ... [2019-11-06 18:42:03,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1f1580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:03, skipping insertion in model container [2019-11-06 18:42:03,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:03" (1/1) ... [2019-11-06 18:42:03,061 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:42:03,086 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:42:03,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:03,362 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:42:03,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:03,412 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:42:03,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:03 WrapperNode [2019-11-06 18:42:03,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:03,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:42:03,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:42:03,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:42:03,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:03" (1/1) ... [2019-11-06 18:42:03,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:03" (1/1) ... [2019-11-06 18:42:03,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:03" (1/1) ... [2019-11-06 18:42:03,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:03" (1/1) ... [2019-11-06 18:42:03,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:03" (1/1) ... [2019-11-06 18:42:03,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:03" (1/1) ... [2019-11-06 18:42:03,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:03" (1/1) ... [2019-11-06 18:42:03,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:42:03,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:42:03,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:42:03,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:42:03,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:42:03,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:42:03,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:42:03,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:42:03,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:42:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:42:03,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:42:03,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:42:03,611 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:42:03,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:42:03,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:42:03,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:42:03,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:42:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:42:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:42:04,041 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:42:04,041 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-06 18:42:04,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:04 BoogieIcfgContainer [2019-11-06 18:42:04,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:42:04,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:42:04,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:42:04,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:42:04,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:42:03" (1/3) ... [2019-11-06 18:42:04,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3800be5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:04, skipping insertion in model container [2019-11-06 18:42:04,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:03" (2/3) ... [2019-11-06 18:42:04,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3800be5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:04, skipping insertion in model container [2019-11-06 18:42:04,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:04" (3/3) ... [2019-11-06 18:42:04,051 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2019-11-06 18:42:04,070 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:42:04,080 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:42:04,092 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:42:04,117 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:42:04,117 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:42:04,118 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:42:04,118 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:42:04,118 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:42:04,118 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:42:04,118 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:42:04,119 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:42:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-11-06 18:42:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:42:04,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:04,142 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:04,144 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:04,148 INFO L82 PathProgramCache]: Analyzing trace with hash -2029657296, now seen corresponding path program 1 times [2019-11-06 18:42:04,155 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:04,155 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787474884] [2019-11-06 18:42:04,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:42:04,357 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787474884] [2019-11-06 18:42:04,362 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:04,362 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:42:04,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906970540] [2019-11-06 18:42:04,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:42:04,374 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:04,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:42:04,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:42:04,387 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-11-06 18:42:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:04,569 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2019-11-06 18:42:04,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:42:04,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-11-06 18:42:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:04,580 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:42:04,580 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:42:04,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:42:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:42:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 18:42:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:42:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-11-06 18:42:04,627 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2019-11-06 18:42:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:04,628 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-11-06 18:42:04,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:42:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-11-06 18:42:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:42:04,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:04,630 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:04,630 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:04,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:04,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2073025378, now seen corresponding path program 1 times [2019-11-06 18:42:04,631 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:04,631 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475565068] [2019-11-06 18:42:04,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:42:04,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475565068] [2019-11-06 18:42:04,744 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:04,744 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:42:04,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443075549] [2019-11-06 18:42:04,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:42:04,749 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:04,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:42:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:04,749 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2019-11-06 18:42:04,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:04,877 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2019-11-06 18:42:04,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:42:04,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-06 18:42:04,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:04,879 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:42:04,880 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:42:04,881 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:04,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:42:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:42:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:42:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2019-11-06 18:42:04,890 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2019-11-06 18:42:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:04,891 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2019-11-06 18:42:04,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:42:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2019-11-06 18:42:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:42:04,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:04,893 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:04,893 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:04,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:04,894 INFO L82 PathProgramCache]: Analyzing trace with hash -55785284, now seen corresponding path program 1 times [2019-11-06 18:42:04,894 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:04,894 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537250972] [2019-11-06 18:42:04,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:42:05,002 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537250972] [2019-11-06 18:42:05,002 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:05,002 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:42:05,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158621393] [2019-11-06 18:42:05,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:42:05,003 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:05,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:42:05,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:05,004 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 4 states. [2019-11-06 18:42:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:05,178 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2019-11-06 18:42:05,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:42:05,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-11-06 18:42:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:05,180 INFO L225 Difference]: With dead ends: 84 [2019-11-06 18:42:05,180 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 18:42:05,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 18:42:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2019-11-06 18:42:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:42:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-11-06 18:42:05,189 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 29 [2019-11-06 18:42:05,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:05,190 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-11-06 18:42:05,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:42:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-11-06 18:42:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:42:05,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:05,192 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:05,192 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:05,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1132383374, now seen corresponding path program 1 times [2019-11-06 18:42:05,193 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:05,193 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168474861] [2019-11-06 18:42:05,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:42:05,328 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168474861] [2019-11-06 18:42:05,328 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750161934] [2019-11-06 18:42:05,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:05,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:42:05,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:42:05,447 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:05,447 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:42:05,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505563037] [2019-11-06 18:42:05,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:42:05,449 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:05,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:42:05,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:42:05,449 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2019-11-06 18:42:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:05,573 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-11-06 18:42:05,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:42:05,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2019-11-06 18:42:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:05,575 INFO L225 Difference]: With dead ends: 90 [2019-11-06 18:42:05,575 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:42:05,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:42:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:42:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-06 18:42:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 18:42:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-11-06 18:42:05,584 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 43 [2019-11-06 18:42:05,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:05,584 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-11-06 18:42:05,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:42:05,585 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-11-06 18:42:05,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:42:05,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:05,586 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:05,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:05,801 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:05,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:05,802 INFO L82 PathProgramCache]: Analyzing trace with hash 165377196, now seen corresponding path program 2 times [2019-11-06 18:42:05,802 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:05,802 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754778231] [2019-11-06 18:42:05,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:42:05,903 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754778231] [2019-11-06 18:42:05,903 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436683913] [2019-11-06 18:42:05,903 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 [2019-11-06 18:42:05,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:42:05,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:05,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:42:05,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:42:05,999 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:05,999 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 18:42:05,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421192018] [2019-11-06 18:42:06,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:42:06,001 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:06,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:42:06,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:06,002 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 8 states. [2019-11-06 18:42:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:06,237 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2019-11-06 18:42:06,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:42:06,238 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2019-11-06 18:42:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:06,240 INFO L225 Difference]: With dead ends: 113 [2019-11-06 18:42:06,240 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:42:06,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:42:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2019-11-06 18:42:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-06 18:42:06,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2019-11-06 18:42:06,258 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 45 [2019-11-06 18:42:06,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:06,258 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2019-11-06 18:42:06,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:42:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2019-11-06 18:42:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 18:42:06,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:06,264 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:06,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:06,477 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:06,478 INFO L82 PathProgramCache]: Analyzing trace with hash -799866724, now seen corresponding path program 3 times [2019-11-06 18:42:06,479 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:06,479 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107987173] [2019-11-06 18:42:06,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 18:42:06,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107987173] [2019-11-06 18:42:06,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990884172] [2019-11-06 18:42:06,636 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 [2019-11-06 18:42:06,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:42:06,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:06,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:42:06,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 18:42:06,768 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:06,768 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:42:06,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961000560] [2019-11-06 18:42:06,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:42:06,770 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:06,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:42:06,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:42:06,770 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 7 states. [2019-11-06 18:42:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:06,976 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2019-11-06 18:42:06,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:42:06,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2019-11-06 18:42:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:06,977 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:42:06,977 INFO L226 Difference]: Without dead ends: 87 [2019-11-06 18:42:06,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:42:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-06 18:42:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2019-11-06 18:42:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-06 18:42:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2019-11-06 18:42:06,998 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 61 [2019-11-06 18:42:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:06,998 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2019-11-06 18:42:06,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:42:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2019-11-06 18:42:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-06 18:42:07,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:07,000 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:07,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:07,201 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:07,202 INFO L82 PathProgramCache]: Analyzing trace with hash 412007534, now seen corresponding path program 4 times [2019-11-06 18:42:07,202 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:07,203 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637649347] [2019-11-06 18:42:07,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 18:42:07,330 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637649347] [2019-11-06 18:42:07,330 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28814227] [2019-11-06 18:42:07,330 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 [2019-11-06 18:42:07,410 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:42:07,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:07,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:42:07,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 18:42:07,471 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:07,472 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:42:07,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98310954] [2019-11-06 18:42:07,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:42:07,475 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:07,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:42:07,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:07,476 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 8 states. [2019-11-06 18:42:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:07,706 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2019-11-06 18:42:07,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:42:07,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2019-11-06 18:42:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:07,708 INFO L225 Difference]: With dead ends: 160 [2019-11-06 18:42:07,708 INFO L226 Difference]: Without dead ends: 101 [2019-11-06 18:42:07,709 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-06 18:42:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2019-11-06 18:42:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-06 18:42:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2019-11-06 18:42:07,719 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 75 [2019-11-06 18:42:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:07,719 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2019-11-06 18:42:07,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:42:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2019-11-06 18:42:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 18:42:07,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:07,721 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:07,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:07,926 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash 46719168, now seen corresponding path program 5 times [2019-11-06 18:42:07,926 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:07,927 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428281192] [2019-11-06 18:42:07,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-06 18:42:08,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428281192] [2019-11-06 18:42:08,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354495948] [2019-11-06 18:42:08,044 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