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/sorting_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:42:35,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:42:35,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:42:35,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:42:35,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:42:35,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:42:35,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:42:35,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:42:35,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:42:35,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:42:35,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:42:35,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:42:35,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:42:35,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:42:35,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:42:35,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:42:35,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:42:35,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:42:35,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:42:35,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:42:35,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:42:35,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:42:35,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:42:35,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:42:35,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:42:35,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:42:35,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:42:35,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:42:35,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:42:35,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:42:35,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:42:35,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:42:35,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:42:35,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:42:35,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:42:35,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:42:35,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:42:35,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:42:35,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:42:35,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:42:35,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:42:35,643 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:42:35,675 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:42:35,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:42:35,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:42:35,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:42:35,677 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:42:35,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:42:35,677 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:42:35,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:42:35,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:42:35,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:42:35,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:42:35,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:42:35,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:42:35,680 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:42:35,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:42:35,681 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:42:35,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:42:35,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:42:35,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:42:35,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:42:35,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:42:35,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:35,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:42:35,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:42:35,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:42:35,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:42:35,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:42:35,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:42:35,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:42:35,963 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:42:35,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:42:35,979 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:42:35,981 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:42:35,981 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:42:35,982 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2019-10-14 21:42:36,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2296de0ed/ce4f9c8e80e346da97bf218c7bc890d3/FLAG277be311d [2019-10-14 21:42:36,482 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:42:36,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2019-10-14 21:42:36,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2296de0ed/ce4f9c8e80e346da97bf218c7bc890d3/FLAG277be311d [2019-10-14 21:42:36,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2296de0ed/ce4f9c8e80e346da97bf218c7bc890d3 [2019-10-14 21:42:36,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:42:36,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:42:36,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:36,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:42:36,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:42:36,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:36" (1/1) ... [2019-10-14 21:42:36,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc525ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:36, skipping insertion in model container [2019-10-14 21:42:36,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:36" (1/1) ... [2019-10-14 21:42:36,932 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:42:36,950 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:42:37,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:37,146 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:42:37,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:37,187 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:42:37,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37 WrapperNode [2019-10-14 21:42:37,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:37,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:42:37,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:42:37,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:42:37,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:42:37,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:42:37,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:42:37,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:42:37,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:37,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:42:37,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:42:37,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:42:37,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:42:37,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:42:37,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:42:37,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:42:37,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:42:37,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:42:37,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:42:37,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:42:37,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:42:37,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:42:37,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:42:37,661 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:42:37,662 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 21:42:37,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:37 BoogieIcfgContainer [2019-10-14 21:42:37,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:42:37,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:42:37,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:42:37,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:42:37,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:42:36" (1/3) ... [2019-10-14 21:42:37,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8d431f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:37, skipping insertion in model container [2019-10-14 21:42:37,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (2/3) ... [2019-10-14 21:42:37,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8d431f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:37, skipping insertion in model container [2019-10-14 21:42:37,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:37" (3/3) ... [2019-10-14 21:42:37,671 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2019-10-14 21:42:37,681 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:42:37,690 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:42:37,701 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:42:37,721 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:42:37,721 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:42:37,722 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:42:37,722 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:42:37,722 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:42:37,722 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:42:37,722 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:42:37,722 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:42:37,737 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 21:42:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:42:37,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:37,743 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:37,744 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:37,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1296691801, now seen corresponding path program 1 times [2019-10-14 21:42:37,756 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:37,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360647280] [2019-10-14 21:42:37,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:37,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:37,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:37,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360647280] [2019-10-14 21:42:37,913 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:37,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:42:37,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679483250] [2019-10-14 21:42:37,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:42:37,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:37,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:42:37,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:37,937 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 21:42:38,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:38,047 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2019-10-14 21:42:38,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:42:38,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:42:38,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:38,058 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:42:38,058 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:42:38,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:42:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:42:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:42:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-14 21:42:38,096 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-10-14 21:42:38,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:38,096 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-14 21:42:38,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:42:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-14 21:42:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:42:38,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:38,098 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:38,099 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:38,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:38,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1547542812, now seen corresponding path program 1 times [2019-10-14 21:42:38,100 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:38,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3548748] [2019-10-14 21:42:38,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,101 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:38,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3548748] [2019-10-14 21:42:38,222 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:38,223 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:38,223 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200287464] [2019-10-14 21:42:38,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:38,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:38,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:38,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:38,227 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-14 21:42:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:38,344 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-14 21:42:38,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:38,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:42:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:38,346 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:42:38,346 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:42:38,347 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:42:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 21:42:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:42:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 21:42:38,362 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-10-14 21:42:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:38,363 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 21:42:38,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 21:42:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:42:38,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:38,367 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:38,367 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:38,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1387426810, now seen corresponding path program 1 times [2019-10-14 21:42:38,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:38,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816287653] [2019-10-14 21:42:38,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:38,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816287653] [2019-10-14 21:42:38,478 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:38,482 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:38,482 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812887176] [2019-10-14 21:42:38,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:38,483 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:38,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:38,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:38,484 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-10-14 21:42:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:38,559 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-10-14 21:42:38,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:38,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 21:42:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:38,561 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:42:38,561 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:42:38,562 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:38,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:42:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 21:42:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:42:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-10-14 21:42:38,569 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2019-10-14 21:42:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:38,570 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-10-14 21:42:38,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-10-14 21:42:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:42:38,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:38,571 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:38,571 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:38,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1108929549, now seen corresponding path program 1 times [2019-10-14 21:42:38,572 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:38,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015021738] [2019-10-14 21:42:38,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,573 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:38,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015021738] [2019-10-14 21:42:38,651 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:38,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:38,651 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644451755] [2019-10-14 21:42:38,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:38,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:38,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:38,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:38,653 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 4 states. [2019-10-14 21:42:38,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:38,735 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2019-10-14 21:42:38,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:38,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-14 21:42:38,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:38,737 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:42:38,737 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:42:38,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:42:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-10-14 21:42:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:42:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-10-14 21:42:38,745 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2019-10-14 21:42:38,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:38,745 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-10-14 21:42:38,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:38,746 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-10-14 21:42:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:42:38,747 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:38,747 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:38,748 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:38,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:38,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2055572838, now seen corresponding path program 1 times [2019-10-14 21:42:38,748 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:38,749 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109097187] [2019-10-14 21:42:38,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:42:38,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109097187] [2019-10-14 21:42:38,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020279454] [2019-10-14 21:42:38,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:38,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:42:38,958 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:38,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:42:38,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202596329] [2019-10-14 21:42:38,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:42:38,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:38,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:42:38,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:38,960 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2019-10-14 21:42:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:39,026 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2019-10-14 21:42:39,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:42:39,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-14 21:42:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:39,027 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:42:39,027 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:42:39,028 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:42:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 21:42:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:42:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-14 21:42:39,034 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2019-10-14 21:42:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:39,034 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-14 21:42:39,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:42:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-14 21:42:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:42:39,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:39,036 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:39,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:39,240 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash 442145592, now seen corresponding path program 2 times [2019-10-14 21:42:39,241 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:39,241 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649102276] [2019-10-14 21:42:39,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:42:39,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649102276] [2019-10-14 21:42:39,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061313716] [2019-10-14 21:42:39,343 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:39,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:39,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:39,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:39,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:42:39,424 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:39,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:42:39,428 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292410430] [2019-10-14 21:42:39,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:42:39,428 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:39,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:42:39,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:39,435 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2019-10-14 21:42:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:39,513 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-10-14 21:42:39,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:42:39,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-14 21:42:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:39,515 INFO L225 Difference]: With dead ends: 60 [2019-10-14 21:42:39,515 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:42:39,516 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:42:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-14 21:42:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:42:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-10-14 21:42:39,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2019-10-14 21:42:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:39,526 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-10-14 21:42:39,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:42:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-10-14 21:42:39,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:42:39,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:39,528 INFO L380 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] [2019-10-14 21:42:39,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:39,732 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:39,732 INFO L82 PathProgramCache]: Analyzing trace with hash -137161642, now seen corresponding path program 3 times [2019-10-14 21:42:39,733 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:39,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431285007] [2019-10-14 21:42:39,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:42:39,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431285007] [2019-10-14 21:42:39,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946989627] [2019-10-14 21:42:39,821 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:39,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:42:39,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:39,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:39,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:42:39,890 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:39,890 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 21:42:39,890 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222059482] [2019-10-14 21:42:39,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:42:39,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:39,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:42:39,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:39,892 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 9 states. [2019-10-14 21:42:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:40,018 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2019-10-14 21:42:40,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:42:40,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-10-14 21:42:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:40,020 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:42:40,020 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:42:40,022 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:42:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2019-10-14 21:42:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:42:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2019-10-14 21:42:40,033 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2019-10-14 21:42:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:40,034 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2019-10-14 21:42:40,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:42:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2019-10-14 21:42:40,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:42:40,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:40,036 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:40,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,237 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:40,237 INFO L82 PathProgramCache]: Analyzing trace with hash -890436781, now seen corresponding path program 4 times [2019-10-14 21:42:40,238 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:40,238 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432684926] [2019-10-14 21:42:40,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:42:40,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432684926] [2019-10-14 21:42:40,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963055430] [2019-10-14 21:42:40,336 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,383 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:40,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:40,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:40,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:42:40,411 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:40,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:42:40,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931422979] [2019-10-14 21:42:40,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:42:40,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:40,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:42:40,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:40,415 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 9 states. [2019-10-14 21:42:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:40,524 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2019-10-14 21:42:40,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:42:40,525 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-10-14 21:42:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:40,526 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:42:40,526 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:42:40,527 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:42:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-10-14 21:42:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:42:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2019-10-14 21:42:40,543 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 32 [2019-10-14 21:42:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:40,544 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2019-10-14 21:42:40,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:42:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2019-10-14 21:42:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:42:40,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:40,550 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:40,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,751 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:40,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:40,751 INFO L82 PathProgramCache]: Analyzing trace with hash -250762123, now seen corresponding path program 5 times [2019-10-14 21:42:40,751 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:40,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149807588] [2019-10-14 21:42:40,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:42:40,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149807588] [2019-10-14 21:42:40,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607156167] [2019-10-14 21:42:40,863 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 [2019-10-14 21:42:40,900 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 21:42:40,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:40,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:40,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:42:40,933 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:40,933 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:42:40,933 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114315853] [2019-10-14 21:42:40,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:42:40,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:40,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:42:40,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:40,935 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 12 states. [2019-10-14 21:42:41,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,023 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-10-14 21:42:41,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:42:41,024 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2019-10-14 21:42:41,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,025 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:42:41,025 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:42:41,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:41,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:42:41,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-10-14 21:42:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:42:41,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-10-14 21:42:41,032 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 34 [2019-10-14 21:42:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,032 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-10-14 21:42:41,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:42:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-10-14 21:42:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:42:41,033 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,034 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,235 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1537034928, now seen corresponding path program 6 times [2019-10-14 21:42:41,235 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039798111] [2019-10-14 21:42:41,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,236 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:42:41,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039798111] [2019-10-14 21:42:41,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669204056] [2019-10-14 21:42:41,358 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,410 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:42:41,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:41,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:41,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:42:41,456 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:41,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 21:42:41,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029653199] [2019-10-14 21:42:41,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:41,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:41,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:41,458 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 14 states. [2019-10-14 21:42:41,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,591 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2019-10-14 21:42:41,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:42:41,592 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-10-14 21:42:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,593 INFO L225 Difference]: With dead ends: 100 [2019-10-14 21:42:41,593 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:42:41,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:42:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2019-10-14 21:42:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:42:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2019-10-14 21:42:41,607 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 39 [2019-10-14 21:42:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,607 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2019-10-14 21:42:41,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2019-10-14 21:42:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 21:42:41,608 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,608 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,810 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,811 INFO L82 PathProgramCache]: Analyzing trace with hash 747611417, now seen corresponding path program 7 times [2019-10-14 21:42:41,811 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289075896] [2019-10-14 21:42:41,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-14 21:42:41,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289075896] [2019-10-14 21:42:41,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843272735] [2019-10-14 21:42:41,920 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:42:41,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-14 21:42:41,992 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:41,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:42:41,993 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439103140] [2019-10-14 21:42:41,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:42:41,994 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:42:41,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:41,994 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 12 states. [2019-10-14 21:42:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:42,084 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2019-10-14 21:42:42,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:42:42,085 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2019-10-14 21:42:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:42,085 INFO L225 Difference]: With dead ends: 104 [2019-10-14 21:42:42,086 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:42:42,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:42:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-10-14 21:42:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 21:42:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2019-10-14 21:42:42,092 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 44 [2019-10-14 21:42:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:42,093 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2019-10-14 21:42:42,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:42:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2019-10-14 21:42:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:42:42,094 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:42,094 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:42,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,299 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:42,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1331800891, now seen corresponding path program 8 times [2019-10-14 21:42:42,300 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:42,300 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336402106] [2019-10-14 21:42:42,300 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-14 21:42:42,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336402106] [2019-10-14 21:42:42,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924415573] [2019-10-14 21:42:42,439 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:42,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:42,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:42,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-14 21:42:42,522 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:42,522 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:42:42,523 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075619638] [2019-10-14 21:42:42,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:42:42,524 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:42,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:42:42,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:42,525 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 13 states. [2019-10-14 21:42:42,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:42,592 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2019-10-14 21:42:42,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:42:42,592 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2019-10-14 21:42:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:42,593 INFO L225 Difference]: With dead ends: 106 [2019-10-14 21:42:42,593 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:42:42,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:42:42,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-10-14 21:42:42,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:42:42,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2019-10-14 21:42:42,608 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 46 [2019-10-14 21:42:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:42,609 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2019-10-14 21:42:42,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:42:42,609 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2019-10-14 21:42:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:42:42,610 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:42,610 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:42,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,814 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:42,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:42,814 INFO L82 PathProgramCache]: Analyzing trace with hash 97169629, now seen corresponding path program 9 times [2019-10-14 21:42:42,815 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:42,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506613568] [2019-10-14 21:42:42,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,816 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-14 21:42:42,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506613568] [2019-10-14 21:42:42,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977755901] [2019-10-14 21:42:42,966 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:42:43,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:43,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:43,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:42:43,104 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:43,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2019-10-14 21:42:43,105 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039493524] [2019-10-14 21:42:43,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:42:43,105 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:43,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:42:43,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:43,106 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 18 states. [2019-10-14 21:42:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:43,304 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2019-10-14 21:42:43,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:42:43,305 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2019-10-14 21:42:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:43,306 INFO L225 Difference]: With dead ends: 118 [2019-10-14 21:42:43,306 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 21:42:43,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:43,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 21:42:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2019-10-14 21:42:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:42:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2019-10-14 21:42:43,325 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 48 [2019-10-14 21:42:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:43,326 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2019-10-14 21:42:43,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:42:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2019-10-14 21:42:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:42:43,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:43,327 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:43,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,531 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:43,531 INFO L82 PathProgramCache]: Analyzing trace with hash 830729064, now seen corresponding path program 10 times [2019-10-14 21:42:43,531 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:43,532 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995271] [2019-10-14 21:42:43,532 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:42:43,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995271] [2019-10-14 21:42:43,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469549243] [2019-10-14 21:42:43,689 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:43,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:43,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:42:43,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:42:43,769 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:43,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:42:43,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596856913] [2019-10-14 21:42:43,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:42:43,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:43,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:42:43,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:42:43,771 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 15 states. [2019-10-14 21:42:43,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:43,891 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2019-10-14 21:42:43,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:42:43,891 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2019-10-14 21:42:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:43,892 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:42:43,892 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:42:43,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:42:43,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:42:43,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-14 21:42:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 21:42:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2019-10-14 21:42:43,898 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 53 [2019-10-14 21:42:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:43,899 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2019-10-14 21:42:43,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:42:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2019-10-14 21:42:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:42:43,900 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:43,900 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:44,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:44,103 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:44,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1163504518, now seen corresponding path program 11 times [2019-10-14 21:42:44,104 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:44,104 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834116329] [2019-10-14 21:42:44,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:42:44,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834116329] [2019-10-14 21:42:44,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412608999] [2019-10-14 21:42:44,255 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:44,334 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-14 21:42:44,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:44,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:42:44,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 21:42:44,414 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:44,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-14 21:42:44,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773616689] [2019-10-14 21:42:44,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:42:44,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:44,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:42:44,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:44,416 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 21 states. [2019-10-14 21:42:44,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:44,561 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2019-10-14 21:42:44,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:42:44,562 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2019-10-14 21:42:44,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:44,563 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:42:44,563 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 21:42:44,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 21:42:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2019-10-14 21:42:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 21:42:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2019-10-14 21:42:44,569 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 55 [2019-10-14 21:42:44,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:44,569 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2019-10-14 21:42:44,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:42:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2019-10-14 21:42:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:42:44,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:44,571 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:44,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:44,775 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash -264767709, now seen corresponding path program 12 times [2019-10-14 21:42:44,776 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:44,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704636229] [2019-10-14 21:42:44,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-14 21:42:44,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704636229] [2019-10-14 21:42:44,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478786884] [2019-10-14 21:42:44,954 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,071 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:42:45,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:45,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:42:45,162 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2019-10-14 21:42:45,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259283904] [2019-10-14 21:42:45,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:42:45,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:42:45,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:45,163 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 23 states. [2019-10-14 21:42:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:45,375 INFO L93 Difference]: Finished difference Result 148 states and 186 transitions. [2019-10-14 21:42:45,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:42:45,375 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2019-10-14 21:42:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:45,376 INFO L225 Difference]: With dead ends: 148 [2019-10-14 21:42:45,377 INFO L226 Difference]: Without dead ends: 96 [2019-10-14 21:42:45,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-14 21:42:45,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2019-10-14 21:42:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 21:42:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2019-10-14 21:42:45,383 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 60 [2019-10-14 21:42:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:45,383 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2019-10-14 21:42:45,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:42:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2019-10-14 21:42:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:42:45,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:45,385 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,593 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,594 INFO L82 PathProgramCache]: Analyzing trace with hash 980957794, now seen corresponding path program 13 times [2019-10-14 21:42:45,594 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920513797] [2019-10-14 21:42:45,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:42:45,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920513797] [2019-10-14 21:42:45,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552293619] [2019-10-14 21:42:45,747 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:42:45,859 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:42:45,859 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232024783] [2019-10-14 21:42:45,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:42:45,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:42:45,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:45,860 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 18 states. [2019-10-14 21:42:46,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,036 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2019-10-14 21:42:46,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:42:46,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2019-10-14 21:42:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,038 INFO L225 Difference]: With dead ends: 152 [2019-10-14 21:42:46,038 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 21:42:46,039 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 21:42:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-14 21:42:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-14 21:42:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2019-10-14 21:42:46,049 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 65 [2019-10-14 21:42:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,050 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2019-10-14 21:42:46,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:42:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2019-10-14 21:42:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:42:46,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,052 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:46,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,253 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:46,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1862843776, now seen corresponding path program 14 times [2019-10-14 21:42:46,254 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:46,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010721839] [2019-10-14 21:42:46,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:42:46,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010721839] [2019-10-14 21:42:46,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250943377] [2019-10-14 21:42:46,517 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:46,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:46,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:42:46,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:42:46,639 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:46,639 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:42:46,639 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915941605] [2019-10-14 21:42:46,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:46,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:46,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:46,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:46,641 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 19 states. [2019-10-14 21:42:46,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,797 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2019-10-14 21:42:46,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:42:46,798 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2019-10-14 21:42:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,799 INFO L225 Difference]: With dead ends: 154 [2019-10-14 21:42:46,799 INFO L226 Difference]: Without dead ends: 96 [2019-10-14 21:42:46,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:46,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-14 21:42:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-10-14 21:42:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 21:42:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2019-10-14 21:42:46,804 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 67 [2019-10-14 21:42:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,804 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2019-10-14 21:42:46,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2019-10-14 21:42:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 21:42:46,805 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,805 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:47,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,009 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:47,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1048252130, now seen corresponding path program 15 times [2019-10-14 21:42:47,011 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:47,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143882286] [2019-10-14 21:42:47,011 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:42:47,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143882286] [2019-10-14 21:42:47,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355274743] [2019-10-14 21:42:47,214 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,292 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:42:47,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:47,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:42:47,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-14 21:42:47,428 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:47,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2019-10-14 21:42:47,428 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037887656] [2019-10-14 21:42:47,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:42:47,429 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:42:47,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:42:47,430 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand 27 states. [2019-10-14 21:42:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:47,682 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2019-10-14 21:42:47,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:42:47,683 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2019-10-14 21:42:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:47,684 INFO L225 Difference]: With dead ends: 166 [2019-10-14 21:42:47,684 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 21:42:47,685 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:42:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 21:42:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2019-10-14 21:42:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-14 21:42:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2019-10-14 21:42:47,692 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 69 [2019-10-14 21:42:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:47,692 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2019-10-14 21:42:47,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:42:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2019-10-14 21:42:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:42:47,693 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:47,693 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:47,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,902 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1331337461, now seen corresponding path program 16 times [2019-10-14 21:42:47,903 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:47,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819884338] [2019-10-14 21:42:47,904 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,904 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-14 21:42:48,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819884338] [2019-10-14 21:42:48,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383766067] [2019-10-14 21:42:48,120 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:48,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:48,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:48,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:48,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-14 21:42:48,318 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:48,318 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2019-10-14 21:42:48,318 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966393700] [2019-10-14 21:42:48,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:42:48,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:48,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:42:48,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:42:48,320 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand 29 states. [2019-10-14 21:42:48,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:48,452 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2019-10-14 21:42:48,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:42:48,452 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 74 [2019-10-14 21:42:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:48,453 INFO L225 Difference]: With dead ends: 180 [2019-10-14 21:42:48,454 INFO L226 Difference]: Without dead ends: 116 [2019-10-14 21:42:48,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:42:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-14 21:42:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2019-10-14 21:42:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-14 21:42:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2019-10-14 21:42:48,459 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 74 [2019-10-14 21:42:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:48,459 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2019-10-14 21:42:48,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:42:48,459 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2019-10-14 21:42:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 21:42:48,460 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:48,460 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:48,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:48,664 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash 261485818, now seen corresponding path program 17 times [2019-10-14 21:42:48,665 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:48,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101460620] [2019-10-14 21:42:48,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-14 21:42:48,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101460620] [2019-10-14 21:42:48,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165869461] [2019-10-14 21:42:48,895 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,159 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 21:42:49,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:49,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:42:49,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-14 21:42:49,346 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:49,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2019-10-14 21:42:49,346 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191382316] [2019-10-14 21:42:49,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:42:49,347 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:49,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:42:49,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:42:49,348 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand 31 states. [2019-10-14 21:42:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:49,613 INFO L93 Difference]: Finished difference Result 194 states and 244 transitions. [2019-10-14 21:42:49,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:42:49,613 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 79 [2019-10-14 21:42:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:49,614 INFO L225 Difference]: With dead ends: 194 [2019-10-14 21:42:49,614 INFO L226 Difference]: Without dead ends: 124 [2019-10-14 21:42:49,615 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:42:49,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-10-14 21:42:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2019-10-14 21:42:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-14 21:42:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 143 transitions. [2019-10-14 21:42:49,622 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 143 transitions. Word has length 79 [2019-10-14 21:42:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:49,622 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 143 transitions. [2019-10-14 21:42:49,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:42:49,623 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2019-10-14 21:42:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-14 21:42:49,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:49,624 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:49,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,830 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:49,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:49,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1674935505, now seen corresponding path program 18 times [2019-10-14 21:42:49,831 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:49,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130833113] [2019-10-14 21:42:49,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-14 21:42:50,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130833113] [2019-10-14 21:42:50,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687423673] [2019-10-14 21:42:50,049 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:50,446 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 21:42:50,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:50,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:42:50,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-14 21:42:50,500 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:50,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-14 21:42:50,502 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614264023] [2019-10-14 21:42:50,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:42:50,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:50,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:42:50,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:50,503 INFO L87 Difference]: Start difference. First operand 119 states and 143 transitions. Second operand 23 states. [2019-10-14 21:42:50,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:50,667 INFO L93 Difference]: Finished difference Result 198 states and 246 transitions. [2019-10-14 21:42:50,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:42:50,669 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2019-10-14 21:42:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:50,670 INFO L225 Difference]: With dead ends: 198 [2019-10-14 21:42:50,670 INFO L226 Difference]: Without dead ends: 122 [2019-10-14 21:42:50,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-14 21:42:50,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-10-14 21:42:50,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 21:42:50,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2019-10-14 21:42:50,675 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 84 [2019-10-14 21:42:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:50,677 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2019-10-14 21:42:50,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:42:50,677 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2019-10-14 21:42:50,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 21:42:50,678 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:50,678 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:50,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:50,879 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:50,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1933852497, now seen corresponding path program 19 times [2019-10-14 21:42:50,880 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:50,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826881584] [2019-10-14 21:42:50,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:50,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:50,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-14 21:42:51,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826881584] [2019-10-14 21:42:51,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900446460] [2019-10-14 21:42:51,120 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:42:51,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-14 21:42:51,212 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:51,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:42:51,213 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704707528] [2019-10-14 21:42:51,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:42:51,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:51,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:42:51,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:42:51,214 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand 24 states. [2019-10-14 21:42:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:51,329 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2019-10-14 21:42:51,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:42:51,329 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2019-10-14 21:42:51,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:51,330 INFO L225 Difference]: With dead ends: 200 [2019-10-14 21:42:51,331 INFO L226 Difference]: Without dead ends: 124 [2019-10-14 21:42:51,332 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:42:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-10-14 21:42:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2019-10-14 21:42:51,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-10-14 21:42:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 147 transitions. [2019-10-14 21:42:51,337 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 147 transitions. Word has length 86 [2019-10-14 21:42:51,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:51,337 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 147 transitions. [2019-10-14 21:42:51,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:42:51,337 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 147 transitions. [2019-10-14 21:42:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 21:42:51,338 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:51,338 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:51,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:51,541 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:51,542 INFO L82 PathProgramCache]: Analyzing trace with hash -354452749, now seen corresponding path program 20 times [2019-10-14 21:42:51,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:51,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964866175] [2019-10-14 21:42:51,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:51,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:51,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-14 21:42:51,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964866175] [2019-10-14 21:42:51,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676778296] [2019-10-14 21:42:51,825 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:51,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:51,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:51,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:42:51,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-14 21:42:51,919 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:51,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:42:51,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732086915] [2019-10-14 21:42:51,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:42:51,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:51,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:42:51,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:51,929 INFO L87 Difference]: Start difference. First operand 123 states and 147 transitions. Second operand 25 states. [2019-10-14 21:42:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:52,085 INFO L93 Difference]: Finished difference Result 202 states and 250 transitions. [2019-10-14 21:42:52,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:42:52,086 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 88 [2019-10-14 21:42:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:52,087 INFO L225 Difference]: With dead ends: 202 [2019-10-14 21:42:52,087 INFO L226 Difference]: Without dead ends: 126 [2019-10-14 21:42:52,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-14 21:42:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2019-10-14 21:42:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 21:42:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2019-10-14 21:42:52,096 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 88 [2019-10-14 21:42:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:52,096 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2019-10-14 21:42:52,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:42:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2019-10-14 21:42:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 21:42:52,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:52,097 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:52,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:52,309 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:52,310 INFO L82 PathProgramCache]: Analyzing trace with hash -392538603, now seen corresponding path program 21 times [2019-10-14 21:42:52,310 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:52,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248582724] [2019-10-14 21:42:52,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-14 21:42:52,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248582724] [2019-10-14 21:42:52,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559416748] [2019-10-14 21:42:52,669 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:52,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 21:42:52,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:52,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:42:52,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-14 21:42:53,049 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:53,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2019-10-14 21:42:53,049 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213015269] [2019-10-14 21:42:53,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:42:53,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:53,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:42:53,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:42:53,051 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand 36 states. [2019-10-14 21:42:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:53,401 INFO L93 Difference]: Finished difference Result 214 states and 268 transitions. [2019-10-14 21:42:53,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:42:53,401 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 90 [2019-10-14 21:42:53,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:53,403 INFO L225 Difference]: With dead ends: 214 [2019-10-14 21:42:53,403 INFO L226 Difference]: Without dead ends: 138 [2019-10-14 21:42:53,404 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:42:53,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-10-14 21:42:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2019-10-14 21:42:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-14 21:42:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 159 transitions. [2019-10-14 21:42:53,409 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 159 transitions. Word has length 90 [2019-10-14 21:42:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:53,410 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 159 transitions. [2019-10-14 21:42:53,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:42:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 159 transitions. [2019-10-14 21:42:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 21:42:53,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:53,411 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:53,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:53,616 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:53,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:53,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1768371632, now seen corresponding path program 22 times [2019-10-14 21:42:53,616 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:53,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047597024] [2019-10-14 21:42:53,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:53,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:53,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-10-14 21:42:53,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047597024] [2019-10-14 21:42:53,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969872263] [2019-10-14 21:42:53,948 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:54,026 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:54,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:54,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:42:54,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-10-14 21:42:54,051 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:54,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:42:54,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957759969] [2019-10-14 21:42:54,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:42:54,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:54,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:42:54,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:42:54,052 INFO L87 Difference]: Start difference. First operand 133 states and 159 transitions. Second operand 27 states. [2019-10-14 21:42:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:54,236 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2019-10-14 21:42:54,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:42:54,237 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 95 [2019-10-14 21:42:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:54,238 INFO L225 Difference]: With dead ends: 218 [2019-10-14 21:42:54,238 INFO L226 Difference]: Without dead ends: 136 [2019-10-14 21:42:54,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:42:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-10-14 21:42:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2019-10-14 21:42:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-14 21:42:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 161 transitions. [2019-10-14 21:42:54,244 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 161 transitions. Word has length 95 [2019-10-14 21:42:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:54,244 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 161 transitions. [2019-10-14 21:42:54,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:42:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 161 transitions. [2019-10-14 21:42:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-14 21:42:54,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:54,245 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:54,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:54,449 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:54,450 INFO L82 PathProgramCache]: Analyzing trace with hash -742920114, now seen corresponding path program 23 times [2019-10-14 21:42:54,450 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:54,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989120781] [2019-10-14 21:42:54,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-10-14 21:42:54,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989120781] [2019-10-14 21:42:54,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134034179] [2019-10-14 21:42:54,831 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:55,470 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-14 21:42:55,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:55,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:42:55,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-14 21:42:55,667 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:55,667 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2019-10-14 21:42:55,667 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880835517] [2019-10-14 21:42:55,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 21:42:55,668 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:55,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 21:42:55,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:42:55,668 INFO L87 Difference]: Start difference. First operand 135 states and 161 transitions. Second operand 39 states. [2019-10-14 21:42:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:55,978 INFO L93 Difference]: Finished difference Result 230 states and 288 transitions. [2019-10-14 21:42:55,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 21:42:55,979 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 97 [2019-10-14 21:42:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:55,980 INFO L225 Difference]: With dead ends: 230 [2019-10-14 21:42:55,981 INFO L226 Difference]: Without dead ends: 148 [2019-10-14 21:42:55,982 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:42:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-10-14 21:42:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2019-10-14 21:42:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-14 21:42:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 171 transitions. [2019-10-14 21:42:55,986 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 171 transitions. Word has length 97 [2019-10-14 21:42:55,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:55,987 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 171 transitions. [2019-10-14 21:42:55,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 21:42:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 171 transitions. [2019-10-14 21:42:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 21:42:55,987 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:55,988 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:56,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:56,190 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:56,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1743015205, now seen corresponding path program 24 times [2019-10-14 21:42:56,191 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:56,191 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324042] [2019-10-14 21:42:56,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:56,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:56,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-14 21:42:56,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324042] [2019-10-14 21:42:56,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99204906] [2019-10-14 21:42:56,582 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:57,834 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-14 21:42:57,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:57,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 21:42:57,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-14 21:42:57,863 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:57,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-10-14 21:42:57,864 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108725267] [2019-10-14 21:42:57,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:42:57,864 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:57,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:42:57,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:42:57,865 INFO L87 Difference]: Start difference. First operand 143 states and 171 transitions. Second operand 29 states. [2019-10-14 21:42:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:58,012 INFO L93 Difference]: Finished difference Result 234 states and 290 transitions. [2019-10-14 21:42:58,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:42:58,012 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 102 [2019-10-14 21:42:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:58,014 INFO L225 Difference]: With dead ends: 234 [2019-10-14 21:42:58,014 INFO L226 Difference]: Without dead ends: 146 [2019-10-14 21:42:58,014 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:42:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-14 21:42:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-10-14 21:42:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-14 21:42:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 173 transitions. [2019-10-14 21:42:58,019 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 173 transitions. Word has length 102 [2019-10-14 21:42:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:58,019 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 173 transitions. [2019-10-14 21:42:58,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:42:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 173 transitions. [2019-10-14 21:42:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 21:42:58,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:58,020 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:58,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:58,226 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:58,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:58,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1419810179, now seen corresponding path program 25 times [2019-10-14 21:42:58,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:58,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319716311] [2019-10-14 21:42:58,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:58,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:58,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-14 21:42:58,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319716311] [2019-10-14 21:42:58,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852610405] [2019-10-14 21:42:58,626 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:42:58,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-14 21:42:58,753 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:58,753 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:42:58,753 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369014583] [2019-10-14 21:42:58,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:42:58,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:42:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:42:58,754 INFO L87 Difference]: Start difference. First operand 145 states and 173 transitions. Second operand 30 states. [2019-10-14 21:42:58,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:58,981 INFO L93 Difference]: Finished difference Result 236 states and 292 transitions. [2019-10-14 21:42:58,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:42:58,982 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 104 [2019-10-14 21:42:58,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:58,983 INFO L225 Difference]: With dead ends: 236 [2019-10-14 21:42:58,983 INFO L226 Difference]: Without dead ends: 148 [2019-10-14 21:42:58,984 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:42:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-10-14 21:42:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2019-10-14 21:42:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-10-14 21:42:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2019-10-14 21:42:58,990 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 104 [2019-10-14 21:42:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:58,990 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2019-10-14 21:42:58,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:42:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2019-10-14 21:42:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 21:42:58,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:58,991 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:59,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:59,194 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:59,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:59,195 INFO L82 PathProgramCache]: Analyzing trace with hash -57425505, now seen corresponding path program 26 times [2019-10-14 21:42:59,195 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:59,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776262233] [2019-10-14 21:42:59,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:59,196 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:59,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-14 21:42:59,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776262233] [2019-10-14 21:42:59,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294945604] [2019-10-14 21:42:59,632 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:59,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:59,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:59,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:42:59,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-14 21:42:59,768 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:59,768 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:42:59,768 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907601695] [2019-10-14 21:42:59,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:42:59,769 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:42:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:42:59,770 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand 31 states. [2019-10-14 21:42:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:59,979 INFO L93 Difference]: Finished difference Result 238 states and 294 transitions. [2019-10-14 21:42:59,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:42:59,980 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 106 [2019-10-14 21:42:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:59,981 INFO L225 Difference]: With dead ends: 238 [2019-10-14 21:42:59,981 INFO L226 Difference]: Without dead ends: 150 [2019-10-14 21:42:59,982 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:42:59,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-14 21:42:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2019-10-14 21:42:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-10-14 21:42:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 177 transitions. [2019-10-14 21:42:59,987 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 177 transitions. Word has length 106 [2019-10-14 21:42:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:59,988 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 177 transitions. [2019-10-14 21:42:59,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:42:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 177 transitions. [2019-10-14 21:42:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-14 21:42:59,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:59,989 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:00,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:00,193 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:00,194 INFO L82 PathProgramCache]: Analyzing trace with hash -770779071, now seen corresponding path program 27 times [2019-10-14 21:43:00,194 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:00,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855626735] [2019-10-14 21:43:00,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:00,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:00,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-14 21:43:00,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855626735] [2019-10-14 21:43:00,614 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258016487] [2019-10-14 21:43:00,614 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:00,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-10-14 21:43:00,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:00,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:43:00,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-10-14 21:43:01,044 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:01,044 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15] total 44 [2019-10-14 21:43:01,044 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084025648] [2019-10-14 21:43:01,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-14 21:43:01,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-14 21:43:01,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=1351, Unknown=0, NotChecked=0, Total=1892 [2019-10-14 21:43:01,045 INFO L87 Difference]: Start difference. First operand 149 states and 177 transitions. Second operand 44 states. [2019-10-14 21:43:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:01,405 INFO L93 Difference]: Finished difference Result 250 states and 312 transitions. [2019-10-14 21:43:01,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-14 21:43:01,405 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 108 [2019-10-14 21:43:01,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:01,406 INFO L225 Difference]: With dead ends: 250 [2019-10-14 21:43:01,406 INFO L226 Difference]: Without dead ends: 162 [2019-10-14 21:43:01,407 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=541, Invalid=1351, Unknown=0, NotChecked=0, Total=1892 [2019-10-14 21:43:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-10-14 21:43:01,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2019-10-14 21:43:01,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-14 21:43:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2019-10-14 21:43:01,413 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 108 [2019-10-14 21:43:01,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:01,413 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2019-10-14 21:43:01,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-14 21:43:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2019-10-14 21:43:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 21:43:01,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:01,414 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:01,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:01,618 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:01,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1597532292, now seen corresponding path program 28 times [2019-10-14 21:43:01,619 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:01,619 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727255011] [2019-10-14 21:43:01,620 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:01,620 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:01,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-10-14 21:43:02,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727255011] [2019-10-14 21:43:02,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059705067] [2019-10-14 21:43:02,029 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:02,119 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:02,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:02,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:43:02,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-10-14 21:43:02,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:02,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 21:43:02,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409832240] [2019-10-14 21:43:02,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:43:02,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:02,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:43:02,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:43:02,148 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand 33 states. [2019-10-14 21:43:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:02,348 INFO L93 Difference]: Finished difference Result 254 states and 314 transitions. [2019-10-14 21:43:02,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:43:02,349 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 113 [2019-10-14 21:43:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:02,350 INFO L225 Difference]: With dead ends: 254 [2019-10-14 21:43:02,350 INFO L226 Difference]: Without dead ends: 160 [2019-10-14 21:43:02,351 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:43:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-10-14 21:43:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2019-10-14 21:43:02,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-10-14 21:43:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 189 transitions. [2019-10-14 21:43:02,360 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 189 transitions. Word has length 113 [2019-10-14 21:43:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:02,361 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 189 transitions. [2019-10-14 21:43:02,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 21:43:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 189 transitions. [2019-10-14 21:43:02,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-14 21:43:02,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:02,362 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:02,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:02,565 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1883834462, now seen corresponding path program 29 times [2019-10-14 21:43:02,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:02,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824249790] [2019-10-14 21:43:02,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:02,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:02,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-10-14 21:43:03,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824249790] [2019-10-14 21:43:03,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479419795] [2019-10-14 21:43:03,291 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:04,315 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2019-10-14 21:43:04,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:04,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:43:04,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-10-14 21:43:04,600 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:04,600 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 16] total 47 [2019-10-14 21:43:04,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858774789] [2019-10-14 21:43:04,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-10-14 21:43:04,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:04,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-10-14 21:43:04,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2019-10-14 21:43:04,602 INFO L87 Difference]: Start difference. First operand 159 states and 189 transitions. Second operand 47 states. [2019-10-14 21:43:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:04,871 INFO L93 Difference]: Finished difference Result 266 states and 332 transitions. [2019-10-14 21:43:04,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-10-14 21:43:04,871 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 115 [2019-10-14 21:43:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:04,873 INFO L225 Difference]: With dead ends: 266 [2019-10-14 21:43:04,873 INFO L226 Difference]: Without dead ends: 172 [2019-10-14 21:43:04,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2019-10-14 21:43:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-10-14 21:43:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2019-10-14 21:43:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-10-14 21:43:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 199 transitions. [2019-10-14 21:43:04,880 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 199 transitions. Word has length 115 [2019-10-14 21:43:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:04,880 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 199 transitions. [2019-10-14 21:43:04,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-10-14 21:43:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 199 transitions. [2019-10-14 21:43:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 21:43:04,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:04,882 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:05,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:05,088 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:05,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:05,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1764460921, now seen corresponding path program 30 times [2019-10-14 21:43:05,089 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:05,089 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768192260] [2019-10-14 21:43:05,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:05,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:05,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-14 21:43:05,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768192260] [2019-10-14 21:43:05,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032150957] [2019-10-14 21:43:05,748 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:09,051 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-10-14 21:43:09,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:09,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 21:43:09,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-14 21:43:09,100 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:09,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2019-10-14 21:43:09,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665322797] [2019-10-14 21:43:09,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:43:09,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:09,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:43:09,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:43:09,102 INFO L87 Difference]: Start difference. First operand 167 states and 199 transitions. Second operand 35 states. [2019-10-14 21:43:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:09,336 INFO L93 Difference]: Finished difference Result 270 states and 334 transitions. [2019-10-14 21:43:09,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:43:09,337 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2019-10-14 21:43:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:09,339 INFO L225 Difference]: With dead ends: 270 [2019-10-14 21:43:09,339 INFO L226 Difference]: Without dead ends: 170 [2019-10-14 21:43:09,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:43:09,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-10-14 21:43:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-10-14 21:43:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-10-14 21:43:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 201 transitions. [2019-10-14 21:43:09,347 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 201 transitions. Word has length 120 [2019-10-14 21:43:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:09,348 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 201 transitions. [2019-10-14 21:43:09,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:43:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 201 transitions. [2019-10-14 21:43:09,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 21:43:09,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:09,351 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:09,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:09,560 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:09,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1896499625, now seen corresponding path program 31 times [2019-10-14 21:43:09,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:09,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391225895] [2019-10-14 21:43:09,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:09,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:09,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-14 21:43:10,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391225895] [2019-10-14 21:43:10,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238248928] [2019-10-14 21:43:10,340 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 21:43:10,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-14 21:43:10,467 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:10,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-10-14 21:43:10,467 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428240396] [2019-10-14 21:43:10,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:43:10,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:10,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:43:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:43:10,469 INFO L87 Difference]: Start difference. First operand 169 states and 201 transitions. Second operand 36 states. [2019-10-14 21:43:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:10,737 INFO L93 Difference]: Finished difference Result 272 states and 336 transitions. [2019-10-14 21:43:10,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:43:10,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 122 [2019-10-14 21:43:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:10,739 INFO L225 Difference]: With dead ends: 272 [2019-10-14 21:43:10,739 INFO L226 Difference]: Without dead ends: 172 [2019-10-14 21:43:10,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:43:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-10-14 21:43:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2019-10-14 21:43:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-10-14 21:43:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2019-10-14 21:43:10,746 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 122 [2019-10-14 21:43:10,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:10,746 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2019-10-14 21:43:10,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:43:10,746 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2019-10-14 21:43:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 21:43:10,747 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:10,747 INFO L380 BasicCegarLoop]: trace histogram [32, 32, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:10,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:10,951 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:10,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:10,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1793598389, now seen corresponding path program 32 times [2019-10-14 21:43:10,952 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:10,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189805039] [2019-10-14 21:43:10,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:10,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:10,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-14 21:43:11,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189805039] [2019-10-14 21:43:11,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871950014] [2019-10-14 21:43:11,465 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:11,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:11,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:11,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 21:43:11,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-14 21:43:11,623 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:11,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-10-14 21:43:11,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181058740] [2019-10-14 21:43:11,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 21:43:11,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:11,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 21:43:11,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:43:11,626 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand 37 states. [2019-10-14 21:43:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:11,878 INFO L93 Difference]: Finished difference Result 274 states and 338 transitions. [2019-10-14 21:43:11,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:43:11,879 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 124 [2019-10-14 21:43:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:11,880 INFO L225 Difference]: With dead ends: 274 [2019-10-14 21:43:11,880 INFO L226 Difference]: Without dead ends: 174 [2019-10-14 21:43:11,881 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:43:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-10-14 21:43:11,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2019-10-14 21:43:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-10-14 21:43:11,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 205 transitions. [2019-10-14 21:43:11,886 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 205 transitions. Word has length 124 [2019-10-14 21:43:11,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:11,887 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 205 transitions. [2019-10-14 21:43:11,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 21:43:11,887 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 205 transitions. [2019-10-14 21:43:11,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:43:11,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:11,888 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:12,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:12,092 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:12,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:12,092 INFO L82 PathProgramCache]: Analyzing trace with hash -334803347, now seen corresponding path program 33 times [2019-10-14 21:43:12,092 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:12,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744126774] [2019-10-14 21:43:12,093 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:12,093 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:12,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-14 21:43:12,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744126774] [2019-10-14 21:43:12,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790128379] [2019-10-14 21:43:12,713 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:13,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-14 21:43:13,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:13,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:43:13,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-10-14 21:43:13,318 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:13,318 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 17] total 52 [2019-10-14 21:43:13,318 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059476815] [2019-10-14 21:43:13,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-10-14 21:43:13,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-10-14 21:43:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=1885, Unknown=0, NotChecked=0, Total=2652 [2019-10-14 21:43:13,320 INFO L87 Difference]: Start difference. First operand 173 states and 205 transitions. Second operand 52 states. [2019-10-14 21:43:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:13,892 INFO L93 Difference]: Finished difference Result 286 states and 356 transitions. [2019-10-14 21:43:13,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-10-14 21:43:13,893 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 126 [2019-10-14 21:43:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:13,895 INFO L225 Difference]: With dead ends: 286 [2019-10-14 21:43:13,895 INFO L226 Difference]: Without dead ends: 186 [2019-10-14 21:43:13,897 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=767, Invalid=1885, Unknown=0, NotChecked=0, Total=2652 [2019-10-14 21:43:13,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-10-14 21:43:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 181. [2019-10-14 21:43:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-10-14 21:43:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2019-10-14 21:43:13,904 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 126 [2019-10-14 21:43:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:13,904 INFO L462 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2019-10-14 21:43:13,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-10-14 21:43:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2019-10-14 21:43:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 21:43:13,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:13,905 INFO L380 BasicCegarLoop]: trace histogram [34, 34, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:14,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:14,110 INFO L410 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:14,111 INFO L82 PathProgramCache]: Analyzing trace with hash 912852824, now seen corresponding path program 34 times [2019-10-14 21:43:14,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:14,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586956321] [2019-10-14 21:43:14,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1487 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 21:43:14,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586956321] [2019-10-14 21:43:14,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557723901] [2019-10-14 21:43:14,694 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:14,804 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:14,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:14,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 21:43:14,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1487 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 21:43:14,852 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:14,852 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2019-10-14 21:43:14,852 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926147639] [2019-10-14 21:43:14,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 21:43:14,853 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:14,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 21:43:14,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:43:14,854 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand 39 states. [2019-10-14 21:43:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:15,119 INFO L93 Difference]: Finished difference Result 290 states and 358 transitions. [2019-10-14 21:43:15,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 21:43:15,119 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 131 [2019-10-14 21:43:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:15,121 INFO L225 Difference]: With dead ends: 290 [2019-10-14 21:43:15,121 INFO L226 Difference]: Without dead ends: 184 [2019-10-14 21:43:15,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:43:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-10-14 21:43:15,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2019-10-14 21:43:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-10-14 21:43:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 217 transitions. [2019-10-14 21:43:15,127 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 217 transitions. Word has length 131 [2019-10-14 21:43:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:15,128 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 217 transitions. [2019-10-14 21:43:15,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 21:43:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 217 transitions. [2019-10-14 21:43:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-14 21:43:15,129 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:15,129 INFO L380 BasicCegarLoop]: trace histogram [35, 35, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:15,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:15,331 INFO L410 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:15,332 INFO L82 PathProgramCache]: Analyzing trace with hash -906409226, now seen corresponding path program 35 times [2019-10-14 21:43:15,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:15,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702231230] [2019-10-14 21:43:15,332 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1556 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 21:43:16,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702231230] [2019-10-14 21:43:16,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084191651] [2019-10-14 21:43:16,158 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true