/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:41:54,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:41:54,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:41:54,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:41:54,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:41:54,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:41:54,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:41:54,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:41:54,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:41:54,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:41:54,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:41:54,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:41:54,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:41:54,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:41:54,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:41:54,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:41:54,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:41:54,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:41:54,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:41:54,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:41:54,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:41:54,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:41:54,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:41:54,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:41:54,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:41:54,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:41:54,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:41:54,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:41:54,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:41:54,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:41:54,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:41:54,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:41:54,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:41:54,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:41:54,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:41:54,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:41:54,468 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 18:41:54,497 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:41:54,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:41:54,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:41:54,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:41:54,499 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:41:54,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:41:54,499 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:41:54,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:41:54,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:41:54,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:41:54,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:41:54,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:41:54,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:41:54,502 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:41:54,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:41:54,503 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:41:54,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:41:54,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:41:54,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:41:54,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:41:54,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:41:54,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:41:54,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:41:54,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:41:54,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:41:54,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:41:54,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:41:54,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:41:54,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:41:54,802 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:41:54,816 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:41:54,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:41:54,821 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:41:54,821 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:41:54,822 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2019-11-06 18:41:54,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e174429e8/cdc22b0060de4ace801a8f758cb2acc8/FLAG745bbdee4 [2019-11-06 18:41:55,340 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:41:55,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2019-11-06 18:41:55,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e174429e8/cdc22b0060de4ace801a8f758cb2acc8/FLAG745bbdee4 [2019-11-06 18:41:55,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e174429e8/cdc22b0060de4ace801a8f758cb2acc8 [2019-11-06 18:41:55,733 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:41:55,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:41:55,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:55,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:41:55,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:41:55,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:55" (1/1) ... [2019-11-06 18:41:55,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632ced85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:55, skipping insertion in model container [2019-11-06 18:41:55,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:55" (1/1) ... [2019-11-06 18:41:55,755 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:41:55,773 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:41:55,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:55,954 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:41:55,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:56,003 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:41:56,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:56 WrapperNode [2019-11-06 18:41:56,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:56,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:41:56,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:41:56,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:41:56,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:56" (1/1) ... [2019-11-06 18:41:56,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:56" (1/1) ... [2019-11-06 18:41:56,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:56" (1/1) ... [2019-11-06 18:41:56,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:56" (1/1) ... [2019-11-06 18:41:56,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:56" (1/1) ... [2019-11-06 18:41:56,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:56" (1/1) ... [2019-11-06 18:41:56,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:56" (1/1) ... [2019-11-06 18:41:56,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:41:56,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:41:56,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:41:56,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:41:56,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:56" (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 18:41:56,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:41:56,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:41:56,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:41:56,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:41:56,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:41:56,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:41:56,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:41:56,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:41:56,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:41:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:41:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:41:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:41:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:41:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:41:56,603 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:41:56,603 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-06 18:41:56,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:41:56 BoogieIcfgContainer [2019-11-06 18:41:56,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:41:56,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:41:56,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:41:56,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:41:56,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:41:55" (1/3) ... [2019-11-06 18:41:56,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1424a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:41:56, skipping insertion in model container [2019-11-06 18:41:56,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:56" (2/3) ... [2019-11-06 18:41:56,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1424a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:41:56, skipping insertion in model container [2019-11-06 18:41:56,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:41:56" (3/3) ... [2019-11-06 18:41:56,613 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2019-11-06 18:41:56,623 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:41:56,631 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:41:56,641 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:41:56,664 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:41:56,664 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:41:56,665 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:41:56,665 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:41:56,665 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:41:56,665 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:41:56,665 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:41:56,665 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:41:56,682 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-11-06 18:41:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:41:56,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:56,690 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 18:41:56,691 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:56,696 INFO L82 PathProgramCache]: Analyzing trace with hash -2029657296, now seen corresponding path program 1 times [2019-11-06 18:41:56,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:56,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950442422] [2019-11-06 18:41:56,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:56,923 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 18:41:56,924 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950442422] [2019-11-06 18:41:56,925 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:56,925 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:41:56,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278226993] [2019-11-06 18:41:56,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:41:56,932 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:56,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:41:56,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:41:56,950 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-11-06 18:41:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:57,144 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2019-11-06 18:41:57,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:41:57,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-11-06 18:41:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:57,156 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:41:57,156 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:41:57,160 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 18:41:57,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:41:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 18:41:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:41:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-11-06 18:41:57,205 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2019-11-06 18:41:57,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:57,206 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-11-06 18:41:57,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:41:57,206 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-11-06 18:41:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:41:57,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:57,208 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 18:41:57,208 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:57,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:57,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2073025378, now seen corresponding path program 1 times [2019-11-06 18:41:57,209 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:57,210 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791979239] [2019-11-06 18:41:57,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:57,304 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 18:41:57,307 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791979239] [2019-11-06 18:41:57,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:57,307 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:57,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779956776] [2019-11-06 18:41:57,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:57,311 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:57,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:57,312 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2019-11-06 18:41:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:57,469 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2019-11-06 18:41:57,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:57,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-06 18:41:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:57,472 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:41:57,472 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:41:57,473 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 18:41:57,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:41:57,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:41:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:41:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2019-11-06 18:41:57,491 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2019-11-06 18:41:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:57,492 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2019-11-06 18:41:57,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2019-11-06 18:41:57,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:41:57,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:57,496 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 18:41:57,496 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash -55785284, now seen corresponding path program 1 times [2019-11-06 18:41:57,499 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:57,499 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374240621] [2019-11-06 18:41:57,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:57,608 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 18:41:57,609 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374240621] [2019-11-06 18:41:57,609 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:57,609 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:57,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966545929] [2019-11-06 18:41:57,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:57,611 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:57,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:57,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:57,612 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 4 states. [2019-11-06 18:41:57,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:57,803 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2019-11-06 18:41:57,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:57,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-11-06 18:41:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:57,805 INFO L225 Difference]: With dead ends: 84 [2019-11-06 18:41:57,805 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 18:41:57,806 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 18:41:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 18:41:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2019-11-06 18:41:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:41:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-11-06 18:41:57,814 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 29 [2019-11-06 18:41:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:57,815 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-11-06 18:41:57,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-11-06 18:41:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:41:57,816 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:57,817 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 18:41:57,817 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1132383374, now seen corresponding path program 1 times [2019-11-06 18:41:57,818 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:57,818 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566661516] [2019-11-06 18:41:57,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:57,968 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 18:41:57,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566661516] [2019-11-06 18:41:57,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660773998] [2019-11-06 18:41:57,969 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 18:41:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:58,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:58,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:58,107 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 18:41:58,109 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:58,109 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:41:58,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608370102] [2019-11-06 18:41:58,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:41:58,110 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:58,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:41:58,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:58,111 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2019-11-06 18:41:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:58,238 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-11-06 18:41:58,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:41:58,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2019-11-06 18:41:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:58,240 INFO L225 Difference]: With dead ends: 90 [2019-11-06 18:41:58,240 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:41:58,241 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 18:41:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:41:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-06 18:41:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 18:41:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-11-06 18:41:58,249 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 43 [2019-11-06 18:41:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:58,249 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-11-06 18:41:58,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:41:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-11-06 18:41:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:41:58,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:58,251 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 18:41:58,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:58,456 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash 165377196, now seen corresponding path program 2 times [2019-11-06 18:41:58,458 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:58,458 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408618447] [2019-11-06 18:41:58,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:58,615 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 18:41:58,615 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408618447] [2019-11-06 18:41:58,616 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873267900] [2019-11-06 18:41:58,617 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 18:41:58,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:41:58,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:58,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:58,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:58,734 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 18:41:58,735 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:58,736 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:41:58,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863553300] [2019-11-06 18:41:58,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:41:58,738 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:58,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:41:58,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:58,739 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 6 states. [2019-11-06 18:41:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:58,967 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2019-11-06 18:41:58,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:41:58,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-11-06 18:41:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:58,969 INFO L225 Difference]: With dead ends: 106 [2019-11-06 18:41:58,969 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:41:58,970 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 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 18:41:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:41:58,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2019-11-06 18:41:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 18:41:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2019-11-06 18:41:58,989 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 45 [2019-11-06 18:41:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:58,989 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2019-11-06 18:41:58,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:41:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2019-11-06 18:41:58,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 18:41:58,997 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:58,998 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:59,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:59,199 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:59,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:59,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1415468158, now seen corresponding path program 3 times [2019-11-06 18:41:59,201 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:59,201 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571134811] [2019-11-06 18:41:59,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 18:41:59,360 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571134811] [2019-11-06 18:41:59,361 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272616994] [2019-11-06 18:41:59,361 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 18:41:59,455 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:41:59,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:59,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:41:59,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 18:41:59,483 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:59,484 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:41:59,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991635912] [2019-11-06 18:41:59,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:41:59,486 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:59,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:41:59,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:41:59,488 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 7 states. [2019-11-06 18:41:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:59,709 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2019-11-06 18:41:59,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:41:59,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2019-11-06 18:41:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:59,713 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:41:59,713 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:41:59,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 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 18:41:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:41:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2019-11-06 18:41:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-06 18:41:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2019-11-06 18:41:59,731 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 59 [2019-11-06 18:41:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:59,733 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2019-11-06 18:41:59,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:41:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2019-11-06 18:41:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-06 18:41:59,735 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:59,738 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:59,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:59,945 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:59,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1535075120, now seen corresponding path program 4 times [2019-11-06 18:41:59,946 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:59,946 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177131137] [2019-11-06 18:41:59,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-06 18:42:00,120 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177131137] [2019-11-06 18:42:00,120 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796184845] [2019-11-06 18:42:00,120 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 18:42:00,202 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:42:00,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:00,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:42:00,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-06 18:42:00,254 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:00,254 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:42:00,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249253518] [2019-11-06 18:42:00,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:42:00,255 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:00,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:42:00,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:00,257 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 8 states. [2019-11-06 18:42:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:00,513 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2019-11-06 18:42:00,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:42:00,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2019-11-06 18:42:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:00,515 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:42:00,515 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 18:42:00,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 74 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 18:42:00,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 18:42:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2019-11-06 18:42:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-06 18:42:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2019-11-06 18:42:00,525 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 73 [2019-11-06 18:42:00,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:00,526 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2019-11-06 18:42:00,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:42:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2019-11-06 18:42:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 18:42:00,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:00,528 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 18:42:00,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:00,732 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1208914526, now seen corresponding path program 5 times [2019-11-06 18:42:00,733 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:00,734 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273185432] [2019-11-06 18:42:00,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 18:42:00,867 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273185432] [2019-11-06 18:42:00,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938694196] [2019-11-06 18:42:00,868 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