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-crafted/zero_sum_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:41:41,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:41:41,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:41:41,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:41:41,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:41:41,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:41:41,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:41:41,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:41:41,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:41:41,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:41:41,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:41:41,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:41:41,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:41:41,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:41:41,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:41:41,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:41:41,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:41:41,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:41:41,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:41:41,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:41:41,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:41:41,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:41:41,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:41:41,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:41:41,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:41:41,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:41:41,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:41:41,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:41:41,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:41:41,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:41:41,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:41:41,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:41:41,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:41:41,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:41:41,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:41:41,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:41:41,468 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:41:41,504 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:41:41,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:41:41,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:41:41,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:41:41,509 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:41:41,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:41:41,510 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:41:41,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:41:41,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:41:41,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:41:41,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:41:41,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:41:41,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:41:41,512 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:41:41,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:41:41,512 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:41:41,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:41:41,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:41:41,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:41:41,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:41:41,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:41:41,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:41,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:41:41,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:41:41,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:41:41,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:41:41,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:41:41,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:41:41,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:41:41,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:41:41,818 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:41:41,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:41:41,825 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:41:41,825 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:41:41,826 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-10-14 21:41:41,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e297520/9aaf756f95f04caaa56faa2973f6761a/FLAG7ba836787 [2019-10-14 21:41:42,411 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:42,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-10-14 21:41:42,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e297520/9aaf756f95f04caaa56faa2973f6761a/FLAG7ba836787 [2019-10-14 21:41:42,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e297520/9aaf756f95f04caaa56faa2973f6761a [2019-10-14 21:41:42,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:42,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:42,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:42,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:42,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:42,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:42" (1/1) ... [2019-10-14 21:41:42,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af8c95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42, skipping insertion in model container [2019-10-14 21:41:42,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:42" (1/1) ... [2019-10-14 21:41:42,849 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:42,874 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:43,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:43,185 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:43,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:43,351 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:43,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:43 WrapperNode [2019-10-14 21:41:43,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:43,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:43,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:43,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:43,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:43" (1/1) ... [2019-10-14 21:41:43,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:43" (1/1) ... [2019-10-14 21:41:43,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:43" (1/1) ... [2019-10-14 21:41:43,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:43" (1/1) ... [2019-10-14 21:41:43,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:43" (1/1) ... [2019-10-14 21:41:43,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:43" (1/1) ... [2019-10-14 21:41:43,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:43" (1/1) ... [2019-10-14 21:41:43,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:43,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:43,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:43,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:43,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:43" (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 21:41:43,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:43,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:43,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:43,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:43,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:43,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:41:43,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:43,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-14 21:41:43,496 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:41:43,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:43,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:41:43,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:43,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:43,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:43,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:43,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:43,877 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:43,877 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-14 21:41:43,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:43 BoogieIcfgContainer [2019-10-14 21:41:43,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:43,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:43,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:43,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:43,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:42" (1/3) ... [2019-10-14 21:41:43,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5497bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:43, skipping insertion in model container [2019-10-14 21:41:43,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:43" (2/3) ... [2019-10-14 21:41:43,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5497bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:43, skipping insertion in model container [2019-10-14 21:41:43,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:43" (3/3) ... [2019-10-14 21:41:43,887 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2019-10-14 21:41:43,896 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:43,904 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:43,917 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:43,951 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:43,951 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:43,951 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:43,951 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:43,952 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:43,952 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:43,952 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:43,952 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2019-10-14 21:41:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:43,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:43,977 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:43,979 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:43,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1272746570, now seen corresponding path program 1 times [2019-10-14 21:41:43,994 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:43,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639820866] [2019-10-14 21:41:43,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:43,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:43,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:44,189 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 21:41:44,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639820866] [2019-10-14 21:41:44,193 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:44,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:44,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508010679] [2019-10-14 21:41:44,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:44,204 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:44,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:44,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:44,218 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2019-10-14 21:41:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:44,409 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-10-14 21:41:44,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:44,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:41:44,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:44,421 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:41:44,422 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:41:44,425 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 21:41:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:41:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 21:41:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:41:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-10-14 21:41:44,470 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2019-10-14 21:41:44,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:44,470 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-10-14 21:41:44,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-10-14 21:41:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:44,472 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:44,473 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:44,473 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:44,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1923539238, now seen corresponding path program 1 times [2019-10-14 21:41:44,474 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:44,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442322787] [2019-10-14 21:41:44,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:44,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:44,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:44,671 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 21:41:44,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442322787] [2019-10-14 21:41:44,672 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:44,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:41:44,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420960142] [2019-10-14 21:41:44,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:44,674 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:44,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:44,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:44,675 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 6 states. [2019-10-14 21:41:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:44,931 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2019-10-14 21:41:44,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:44,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-10-14 21:41:44,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:44,933 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:41:44,934 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:41:44,935 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:41:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-14 21:41:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 21:41:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2019-10-14 21:41:44,958 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2019-10-14 21:41:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:44,958 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2019-10-14 21:41:44,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:44,959 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2019-10-14 21:41:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:41:44,961 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:44,962 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:44,962 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:44,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:44,962 INFO L82 PathProgramCache]: Analyzing trace with hash -772301532, now seen corresponding path program 1 times [2019-10-14 21:41:44,963 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:44,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071315943] [2019-10-14 21:41:44,963 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:44,964 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:44,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,057 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 21:41:45,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071315943] [2019-10-14 21:41:45,057 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:45,058 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:45,058 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010585443] [2019-10-14 21:41:45,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:45,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:45,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:45,062 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2019-10-14 21:41:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:45,220 INFO L93 Difference]: Finished difference Result 119 states and 157 transitions. [2019-10-14 21:41:45,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:45,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-10-14 21:41:45,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:45,222 INFO L225 Difference]: With dead ends: 119 [2019-10-14 21:41:45,222 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:41:45,223 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 21:41:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:41:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-14 21:41:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:41:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-10-14 21:41:45,243 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 34 [2019-10-14 21:41:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:45,243 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-10-14 21:41:45,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-10-14 21:41:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:41:45,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:45,245 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:45,245 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:45,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:45,246 INFO L82 PathProgramCache]: Analyzing trace with hash -213249118, now seen corresponding path program 1 times [2019-10-14 21:41:45,246 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:45,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354373043] [2019-10-14 21:41:45,247 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,247 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:41:45,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354373043] [2019-10-14 21:41:45,327 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:45,327 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:45,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62787856] [2019-10-14 21:41:45,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:45,328 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:45,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:45,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:45,330 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 5 states. [2019-10-14 21:41:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:45,537 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2019-10-14 21:41:45,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:45,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-14 21:41:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:45,538 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:41:45,539 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:41:45,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 21:41:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:41:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2019-10-14 21:41:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:41:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-10-14 21:41:45,548 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 36 [2019-10-14 21:41:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:45,548 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-10-14 21:41:45,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-10-14 21:41:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:41:45,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:45,551 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:45,551 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:45,551 INFO L82 PathProgramCache]: Analyzing trace with hash 25817296, now seen corresponding path program 1 times [2019-10-14 21:41:45,552 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:45,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963344642] [2019-10-14 21:41:45,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:41:45,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963344642] [2019-10-14 21:41:45,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475598844] [2019-10-14 21:41:45,678 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 21:41:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:45,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:41:45,824 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:45,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:41:45,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245340919] [2019-10-14 21:41:45,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:41:45,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:45,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:41:45,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:45,828 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 7 states. [2019-10-14 21:41:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:46,038 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2019-10-14 21:41:46,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:46,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2019-10-14 21:41:46,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:46,039 INFO L225 Difference]: With dead ends: 103 [2019-10-14 21:41:46,039 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:41:46,040 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:41:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-14 21:41:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:41:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2019-10-14 21:41:46,048 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2019-10-14 21:41:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:46,048 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2019-10-14 21:41:46,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:41:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2019-10-14 21:41:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:41:46,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:46,050 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:46,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:46,251 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:46,252 INFO L82 PathProgramCache]: Analyzing trace with hash -95536050, now seen corresponding path program 2 times [2019-10-14 21:41:46,252 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:46,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12946130] [2019-10-14 21:41:46,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:41:46,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12946130] [2019-10-14 21:41:46,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088284893] [2019-10-14 21:41:46,372 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 21:41:46,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:46,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:46,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:46,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:41:46,471 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:46,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 21:41:46,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300219463] [2019-10-14 21:41:46,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:46,473 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:46,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:46,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:46,473 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 8 states. [2019-10-14 21:41:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:46,740 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2019-10-14 21:41:46,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:41:46,740 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-10-14 21:41:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:46,742 INFO L225 Difference]: With dead ends: 129 [2019-10-14 21:41:46,742 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 21:41:46,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 21:41:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2019-10-14 21:41:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:41:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-10-14 21:41:46,752 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56 [2019-10-14 21:41:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:46,752 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-10-14 21:41:46,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-10-14 21:41:46,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:41:46,754 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:46,755 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:46,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:46,957 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:46,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1296186118, now seen corresponding path program 3 times [2019-10-14 21:41:46,959 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:46,959 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198959581] [2019-10-14 21:41:46,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:48,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198959581] [2019-10-14 21:41:48,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512895748] [2019-10-14 21:41:48,758 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 21:41:48,821 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:41:48,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:48,824 WARN L254 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-14 21:41:48,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:48,932 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 21:41:48,933 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:48,944 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:48,945 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:41:48,945 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-10-14 21:41:50,663 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:41:50,674 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:50,675 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2019-10-14 21:41:50,676 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:50,706 INFO L567 ElimStorePlain]: treesize reduction 16, result has 70.9 percent of original size [2019-10-14 21:41:50,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:50,711 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:41:50,711 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:36 [2019-10-14 21:41:50,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:50,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:50,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:50,997 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:50,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 41 [2019-10-14 21:41:50,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903246812] [2019-10-14 21:41:51,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-14 21:41:51,000 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:51,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-14 21:41:51,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 21:41:51,003 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 41 states. [2019-10-14 21:41:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:54,166 INFO L93 Difference]: Finished difference Result 212 states and 242 transitions. [2019-10-14 21:41:54,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:41:54,167 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 76 [2019-10-14 21:41:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:54,171 INFO L225 Difference]: With dead ends: 212 [2019-10-14 21:41:54,171 INFO L226 Difference]: Without dead ends: 206 [2019-10-14 21:41:54,173 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 45 SyntacticMatches, 50 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=255, Invalid=2607, Unknown=0, NotChecked=0, Total=2862 [2019-10-14 21:41:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-10-14 21:41:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 130. [2019-10-14 21:41:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-14 21:41:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2019-10-14 21:41:54,192 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2019-10-14 21:41:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:54,192 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2019-10-14 21:41:54,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-14 21:41:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2019-10-14 21:41:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:41:54,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:54,195 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:54,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:54,399 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash -862553096, now seen corresponding path program 4 times [2019-10-14 21:41:54,400 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:54,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406454779] [2019-10-14 21:41:54,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:54,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:54,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:41:54,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406454779] [2019-10-14 21:41:54,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289400427] [2019-10-14 21:41:54,512 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 21:41:54,577 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:54,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:54,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:54,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:41:54,669 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:54,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:41:54,670 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070961360] [2019-10-14 21:41:54,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:41:54,677 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:54,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:41:54,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:54,678 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand 14 states. [2019-10-14 21:41:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:55,331 INFO L93 Difference]: Finished difference Result 293 states and 339 transitions. [2019-10-14 21:41:55,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:41:55,332 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 78 [2019-10-14 21:41:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:55,336 INFO L225 Difference]: With dead ends: 293 [2019-10-14 21:41:55,336 INFO L226 Difference]: Without dead ends: 171 [2019-10-14 21:41:55,338 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:41:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-10-14 21:41:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 145. [2019-10-14 21:41:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-14 21:41:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 163 transitions. [2019-10-14 21:41:55,353 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 163 transitions. Word has length 78 [2019-10-14 21:41:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:55,354 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 163 transitions. [2019-10-14 21:41:55,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:41:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 163 transitions. [2019-10-14 21:41:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 21:41:55,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:55,356 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:55,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:55,559 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:55,559 INFO L82 PathProgramCache]: Analyzing trace with hash -320389322, now seen corresponding path program 5 times [2019-10-14 21:41:55,559 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:55,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28091937] [2019-10-14 21:41:55,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:55,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:55,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 21:41:55,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28091937] [2019-10-14 21:41:55,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360963714] [2019-10-14 21:41:55,655 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 21:41:55,913 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:41:55,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:55,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:55,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 21:41:55,982 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:55,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:41:55,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245239938] [2019-10-14 21:41:55,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:41:55,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:55,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:41:55,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:55,984 INFO L87 Difference]: Start difference. First operand 145 states and 163 transitions. Second operand 14 states. [2019-10-14 21:41:56,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:56,548 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2019-10-14 21:41:56,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:41:56,549 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2019-10-14 21:41:56,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:56,551 INFO L225 Difference]: With dead ends: 162 [2019-10-14 21:41:56,551 INFO L226 Difference]: Without dead ends: 109 [2019-10-14 21:41:56,552 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:41:56,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-14 21:41:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2019-10-14 21:41:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 21:41:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2019-10-14 21:41:56,561 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 80 [2019-10-14 21:41:56,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:56,562 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2019-10-14 21:41:56,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:41:56,562 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2019-10-14 21:41:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:41:56,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:56,564 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:56,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:56,768 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:56,769 INFO L82 PathProgramCache]: Analyzing trace with hash -850657884, now seen corresponding path program 6 times [2019-10-14 21:41:56,769 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:56,769 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120661123] [2019-10-14 21:41:56,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:56,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:56,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,124 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2019-10-14 21:41:58,277 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2019-10-14 21:41:59,020 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2019-10-14 21:41:59,190 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2019-10-14 21:41:59,342 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-14 21:41:59,879 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2019-10-14 21:42:00,050 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2019-10-14 21:42:00,225 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-10-14 21:42:00,404 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-14 21:42:00,591 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-14 21:42:00,787 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2019-10-14 21:42:01,194 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2019-10-14 21:42:01,421 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2019-10-14 21:42:01,606 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-10-14 21:42:02,173 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2019-10-14 21:42:02,398 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-10-14 21:42:03,059 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2019-10-14 21:42:03,262 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2019-10-14 21:42:03,442 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2019-10-14 21:42:04,352 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2019-10-14 21:42:04,571 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2019-10-14 21:42:04,799 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2019-10-14 21:42:05,036 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2019-10-14 21:42:05,232 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2019-10-14 21:42:06,139 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2019-10-14 21:42:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:07,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120661123] [2019-10-14 21:42:07,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418371762] [2019-10-14 21:42:07,291 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 21:42:07,362 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:42:07,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:07,366 WARN L254 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 142 conjunts are in the unsatisfiable core [2019-10-14 21:42:07,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:07,455 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 21:42:07,455 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:07,464 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:07,464 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:07,464 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-14 21:42:07,576 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:07,577 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2019-10-14 21:42:07,577 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:07,588 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:07,589 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:07,589 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2019-10-14 21:42:12,761 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:12,762 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:12,762 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:42:12,769 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:42:12,770 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:42:12,771 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:42:12,802 INFO L341 Elim1Store]: treesize reduction 6, result has 68.4 percent of original size [2019-10-14 21:42:12,803 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 30 [2019-10-14 21:42:12,804 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:12,812 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:12,813 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:12,813 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:70, output treesize:3 [2019-10-14 21:42:12,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:13,191 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:13,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 43] total 102 [2019-10-14 21:42:13,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824527008] [2019-10-14 21:42:13,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-10-14 21:42:13,192 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:13,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-10-14 21:42:13,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=9544, Unknown=0, NotChecked=0, Total=10302 [2019-10-14 21:42:13,196 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 102 states. [2019-10-14 21:42:15,338 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 49 [2019-10-14 21:42:16,325 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2019-10-14 21:42:16,604 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2019-10-14 21:42:17,240 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 55 [2019-10-14 21:42:18,170 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 39 [2019-10-14 21:42:21,398 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 36