/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_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:41:42,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:41:42,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:41:42,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:41:42,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:41:42,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:41:42,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:41:42,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:41:42,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:41:42,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:41:42,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:41:42,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:41:42,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:41:42,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:41:42,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:41:42,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:41:42,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:41:42,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:41:42,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:41:42,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:41:42,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:41:42,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:41:42,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:41:42,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:41:42,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:41:42,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:41:42,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:41:42,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:41:42,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:41:42,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:41:42,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:41:42,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:41:42,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:41:42,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:41:42,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:41:42,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:41:42,695 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 18:41:42,734 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:41:42,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:41:42,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:41:42,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:41:42,735 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:41:42,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:41:42,740 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:41:42,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:41:42,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:41:42,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:41:42,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:41:42,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:41:42,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:41:42,742 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:41:42,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:41:42,742 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:41:42,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:41:42,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:41:42,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:41:42,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:41:42,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:41:42,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:41:42,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:41:42,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:41:42,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:41:42,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:41:42,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:41:42,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:41:42,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:41:43,012 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:41:43,021 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:41:43,028 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:41:43,030 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:41:43,030 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:41:43,031 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2019-11-06 18:41:43,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e0b6dcf/1270690b41ac48af866a5d6ab81cb628/FLAG4128ef505 [2019-11-06 18:41:43,588 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:41:43,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2019-11-06 18:41:43,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e0b6dcf/1270690b41ac48af866a5d6ab81cb628/FLAG4128ef505 [2019-11-06 18:41:44,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e0b6dcf/1270690b41ac48af866a5d6ab81cb628 [2019-11-06 18:41:44,023 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:41:44,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:41:44,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:44,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:41:44,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:41:44,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:44" (1/1) ... [2019-11-06 18:41:44,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@369fef27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:44, skipping insertion in model container [2019-11-06 18:41:44,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:44" (1/1) ... [2019-11-06 18:41:44,042 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:41:44,062 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:41:44,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:44,233 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:41:44,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:44,281 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:41:44,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:44 WrapperNode [2019-11-06 18:41:44,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:44,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:41:44,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:41:44,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:41:44,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:44" (1/1) ... [2019-11-06 18:41:44,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:44" (1/1) ... [2019-11-06 18:41:44,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:44" (1/1) ... [2019-11-06 18:41:44,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:44" (1/1) ... [2019-11-06 18:41:44,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:44" (1/1) ... [2019-11-06 18:41:44,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:44" (1/1) ... [2019-11-06 18:41:44,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:44" (1/1) ... [2019-11-06 18:41:44,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:41:44,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:41:44,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:41:44,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:41:44,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:44" (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 18:41:44,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:41:44,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:41:44,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:41:44,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:41:44,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:41:44,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:41:44,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:41:44,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:41:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:41:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:41:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:41:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:41:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:41:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:41:44,844 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:41:44,845 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-06 18:41:44,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:41:44 BoogieIcfgContainer [2019-11-06 18:41:44,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:41:44,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:41:44,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:41:44,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:41:44,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:41:44" (1/3) ... [2019-11-06 18:41:44,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f18c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:41:44, skipping insertion in model container [2019-11-06 18:41:44,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:44" (2/3) ... [2019-11-06 18:41:44,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f18c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:41:44, skipping insertion in model container [2019-11-06 18:41:44,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:41:44" (3/3) ... [2019-11-06 18:41:44,855 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2019-11-06 18:41:44,865 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:41:44,872 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:41:44,884 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:41:44,910 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:41:44,910 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:41:44,910 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:41:44,910 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:41:44,911 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:41:44,911 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:41:44,911 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:41:44,911 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:41:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-11-06 18:41:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:41:44,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:44,938 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] [2019-11-06 18:41:44,940 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:44,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2095174276, now seen corresponding path program 1 times [2019-11-06 18:41:44,952 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:44,953 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30322730] [2019-11-06 18:41:44,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:45,135 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 18:41:45,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30322730] [2019-11-06 18:41:45,137 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:45,138 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:41:45,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497390354] [2019-11-06 18:41:45,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:41:45,144 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:41:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:41:45,161 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-11-06 18:41:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:45,314 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-11-06 18:41:45,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:41:45,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-06 18:41:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:45,325 INFO L225 Difference]: With dead ends: 70 [2019-11-06 18:41:45,325 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:41:45,329 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 18:41:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:41:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-06 18:41:45,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:41:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-06 18:41:45,374 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-11-06 18:41:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:45,375 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-06 18:41:45,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:41:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-06 18:41:45,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:41:45,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:45,377 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] [2019-11-06 18:41:45,377 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:45,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1625097866, now seen corresponding path program 1 times [2019-11-06 18:41:45,378 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:45,379 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903203894] [2019-11-06 18:41:45,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:45,520 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 18:41:45,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903203894] [2019-11-06 18:41:45,521 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:45,521 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:45,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570327649] [2019-11-06 18:41:45,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:45,524 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:45,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:45,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:45,525 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 4 states. [2019-11-06 18:41:45,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:45,640 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2019-11-06 18:41:45,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:45,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-06 18:41:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:45,642 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:41:45,642 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:41:45,644 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 18:41:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:41:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:41:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:41:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-11-06 18:41:45,652 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2019-11-06 18:41:45,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:45,652 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-11-06 18:41:45,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:45,652 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-11-06 18:41:45,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:41:45,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:45,654 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] [2019-11-06 18:41:45,654 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:45,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1623092332, now seen corresponding path program 1 times [2019-11-06 18:41:45,655 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:45,655 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163225944] [2019-11-06 18:41:45,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:45,716 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 18:41:45,716 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163225944] [2019-11-06 18:41:45,717 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:45,717 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:45,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422179033] [2019-11-06 18:41:45,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:45,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:45,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:45,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:45,719 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2019-11-06 18:41:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:45,869 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2019-11-06 18:41:45,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:45,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-06 18:41:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:45,871 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:41:45,872 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:41:45,872 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 18:41:45,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:41:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2019-11-06 18:41:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:41:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-11-06 18:41:45,880 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2019-11-06 18:41:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:45,881 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-11-06 18:41:45,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-11-06 18:41:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:41:45,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:45,883 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] [2019-11-06 18:41:45,883 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1928668694, now seen corresponding path program 1 times [2019-11-06 18:41:45,884 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:45,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977102548] [2019-11-06 18:41:45,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:41:46,049 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977102548] [2019-11-06 18:41:46,049 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094155044] [2019-11-06 18:41:46,050 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 18:41:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:46,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:46,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:41:46,157 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:46,157 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:41:46,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691042450] [2019-11-06 18:41:46,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:41:46,158 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:46,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:41:46,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:46,159 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2019-11-06 18:41:46,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:46,254 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-11-06 18:41:46,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:41:46,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-06 18:41:46,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:46,256 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:41:46,256 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:41:46,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 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 18:41:46,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:41:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-06 18:41:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:41:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-11-06 18:41:46,264 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 35 [2019-11-06 18:41:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:46,264 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-11-06 18:41:46,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:41:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-11-06 18:41:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:41:46,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:46,266 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] [2019-11-06 18:41:46,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:46,471 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:46,471 INFO L82 PathProgramCache]: Analyzing trace with hash 359479048, now seen corresponding path program 2 times [2019-11-06 18:41:46,472 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:46,472 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803331609] [2019-11-06 18:41:46,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:41:46,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803331609] [2019-11-06 18:41:46,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933475691] [2019-11-06 18:41:46,646 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 18:41:46,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:41:46,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:46,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:41:46,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:41:46,742 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:46,744 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:41:46,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827949216] [2019-11-06 18:41:46,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:41:46,746 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:46,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:41:46,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:41:46,746 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 7 states. [2019-11-06 18:41:46,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:46,860 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2019-11-06 18:41:46,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:41:46,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2019-11-06 18:41:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:46,862 INFO L225 Difference]: With dead ends: 76 [2019-11-06 18:41:46,862 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:41:46,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 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 18:41:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:41:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-06 18:41:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:41:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-11-06 18:41:46,877 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 37 [2019-11-06 18:41:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:46,878 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-11-06 18:41:46,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:41:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-11-06 18:41:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:41:46,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:46,879 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:47,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:47,092 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:47,092 INFO L82 PathProgramCache]: Analyzing trace with hash 246203558, now seen corresponding path program 3 times [2019-11-06 18:41:47,093 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:47,093 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197519458] [2019-11-06 18:41:47,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:41:47,189 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197519458] [2019-11-06 18:41:47,189 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467337119] [2019-11-06 18:41:47,189 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 18:41:47,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:41:47,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:47,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:47,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:41:47,314 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:47,315 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 18:41:47,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489756326] [2019-11-06 18:41:47,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:41:47,317 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:47,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:41:47,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:41:47,318 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 9 states. [2019-11-06 18:41:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:47,579 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2019-11-06 18:41:47,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:41:47,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-11-06 18:41:47,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:47,582 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:41:47,582 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 18:41:47,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:41:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 18:41:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2019-11-06 18:41:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:41:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-11-06 18:41:47,591 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 39 [2019-11-06 18:41:47,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:47,591 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-11-06 18:41:47,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:41:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-11-06 18:41:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:41:47,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:47,593 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 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] [2019-11-06 18:41:47,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:47,798 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:47,798 INFO L82 PathProgramCache]: Analyzing trace with hash 575548698, now seen corresponding path program 4 times [2019-11-06 18:41:47,798 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:47,799 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891053499] [2019-11-06 18:41:47,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-06 18:41:47,896 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891053499] [2019-11-06 18:41:47,896 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131773760] [2019-11-06 18:41:47,896 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 18:41:47,955 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:41:47,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:47,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:41:47,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-06 18:41:48,022 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:48,022 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2019-11-06 18:41:48,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569444823] [2019-11-06 18:41:48,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:41:48,023 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:48,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:41:48,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:41:48,024 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 11 states. [2019-11-06 18:41:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:48,212 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2019-11-06 18:41:48,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:41:48,212 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2019-11-06 18:41:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:48,214 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:41:48,214 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:41:48,215 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:41:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:41:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2019-11-06 18:41:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-06 18:41:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2019-11-06 18:41:48,223 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 51 [2019-11-06 18:41:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:48,224 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2019-11-06 18:41:48,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:41:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2019-11-06 18:41:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 18:41:48,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:48,225 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 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] [2019-11-06 18:41:48,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:48,429 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:48,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:48,430 INFO L82 PathProgramCache]: Analyzing trace with hash 186079118, now seen corresponding path program 5 times [2019-11-06 18:41:48,430 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:48,430 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040081544] [2019-11-06 18:41:48,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-06 18:41:48,573 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040081544] [2019-11-06 18:41:48,573 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584426442] [2019-11-06 18:41:48,573 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