/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:39:36,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:39:36,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:39:36,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:39:36,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:39:36,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:39:36,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:39:36,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:39:36,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:39:36,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:39:36,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:39:36,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:39:36,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:39:36,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:39:36,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:39:36,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:39:36,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:39:36,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:39:36,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:39:36,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:39:36,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:39:36,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:39:36,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:39:36,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:39:36,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:39:36,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:39:36,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:39:36,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:39:36,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:39:36,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:39:36,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:39:36,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:39:36,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:39:36,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:39:36,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:39:36,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:39:36,267 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:39:36,280 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:39:36,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:39:36,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:39:36,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:39:36,282 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:39:36,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:39:36,282 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:39:36,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:39:36,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:39:36,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:39:36,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:39:36,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:39:36,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:39:36,284 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:39:36,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:39:36,284 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:39:36,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:39:36,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:39:36,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:39:36,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:39:36,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:39:36,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:39:36,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:39:36,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:39:36,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:39:36,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:39:36,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:39:36,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:39:36,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:39:36,563 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:39:36,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:39:36,579 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:39:36,581 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:39:36,581 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:39:36,582 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2019-11-06 18:39:36,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce1f47591/b543bc5312ec4512aaeeee4cd5ca04d8/FLAG6d4d5839c [2019-11-06 18:39:37,121 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:39:37,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2019-11-06 18:39:37,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce1f47591/b543bc5312ec4512aaeeee4cd5ca04d8/FLAG6d4d5839c [2019-11-06 18:39:37,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce1f47591/b543bc5312ec4512aaeeee4cd5ca04d8 [2019-11-06 18:39:37,523 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:39:37,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:39:37,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:39:37,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:39:37,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:39:37,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:39:37" (1/1) ... [2019-11-06 18:39:37,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcc3485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:37, skipping insertion in model container [2019-11-06 18:39:37,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:39:37" (1/1) ... [2019-11-06 18:39:37,543 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:39:37,560 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:39:37,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:39:37,739 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:39:37,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:39:37,782 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:39:37,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:37 WrapperNode [2019-11-06 18:39:37,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:39:37,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:39:37,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:39:37,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:39:37,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:37" (1/1) ... [2019-11-06 18:39:37,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:37" (1/1) ... [2019-11-06 18:39:37,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:37" (1/1) ... [2019-11-06 18:39:37,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:37" (1/1) ... [2019-11-06 18:39:37,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:37" (1/1) ... [2019-11-06 18:39:37,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:37" (1/1) ... [2019-11-06 18:39:37,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:37" (1/1) ... [2019-11-06 18:39:37,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:39:37,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:39:37,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:39:37,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:39:37,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:37" (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 [2019-11-06 18:39:37,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:39:37,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:39:37,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:39:37,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:39:37,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:39:37,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:39:37,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:39:37,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:39:37,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:39:37,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:39:37,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:39:37,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:39:37,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:39:37,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:39:38,254 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:39:38,254 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:39:38,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:39:38 BoogieIcfgContainer [2019-11-06 18:39:38,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:39:38,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:39:38,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:39:38,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:39:38,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:39:37" (1/3) ... [2019-11-06 18:39:38,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc70f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:39:38, skipping insertion in model container [2019-11-06 18:39:38,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:37" (2/3) ... [2019-11-06 18:39:38,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc70f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:39:38, skipping insertion in model container [2019-11-06 18:39:38,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:39:38" (3/3) ... [2019-11-06 18:39:38,272 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2019-11-06 18:39:38,288 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:39:38,294 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:39:38,304 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:39:38,324 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:39:38,324 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:39:38,325 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:39:38,325 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:39:38,325 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:39:38,325 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:39:38,325 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:39:38,325 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:39:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-06 18:39:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:39:38,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:38,346 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:38,348 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:38,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1998025284, now seen corresponding path program 1 times [2019-11-06 18:39:38,359 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:38,360 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405213712] [2019-11-06 18:39:38,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:38,536 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405213712] [2019-11-06 18:39:38,536 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:38,537 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:39:38,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009206672] [2019-11-06 18:39:38,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:39:38,542 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:38,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:39:38,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:39:38,561 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-11-06 18:39:38,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:38,684 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2019-11-06 18:39:38,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:39:38,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:39:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:38,697 INFO L225 Difference]: With dead ends: 48 [2019-11-06 18:39:38,698 INFO L226 Difference]: Without dead ends: 23 [2019-11-06 18:39:38,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:39:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-06 18:39:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-06 18:39:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-06 18:39:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-06 18:39:38,751 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2019-11-06 18:39:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:38,751 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-06 18:39:38,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:39:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-06 18:39:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:39:38,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:38,753 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:38,754 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:38,754 INFO L82 PathProgramCache]: Analyzing trace with hash -915838997, now seen corresponding path program 1 times [2019-11-06 18:39:38,755 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:38,755 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021075618] [2019-11-06 18:39:38,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:38,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021075618] [2019-11-06 18:39:38,833 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:38,834 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:39:38,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285248199] [2019-11-06 18:39:38,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:39:38,841 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:38,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:39:38,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:38,843 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2019-11-06 18:39:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:38,930 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-11-06 18:39:38,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:39:38,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 18:39:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:38,932 INFO L225 Difference]: With dead ends: 40 [2019-11-06 18:39:38,932 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 18:39:38,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 18:39:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-06 18:39:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:39:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-06 18:39:38,941 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2019-11-06 18:39:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:38,941 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-06 18:39:38,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:39:38,942 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-06 18:39:38,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:39:38,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:38,943 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:38,943 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:38,944 INFO L82 PathProgramCache]: Analyzing trace with hash 203688137, now seen corresponding path program 1 times [2019-11-06 18:39:38,944 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:38,944 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69210115] [2019-11-06 18:39:38,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:39,012 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69210115] [2019-11-06 18:39:39,013 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:39,013 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:39:39,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950756027] [2019-11-06 18:39:39,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:39:39,014 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:39,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:39:39,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:39,015 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-11-06 18:39:39,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:39,079 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-06 18:39:39,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:39:39,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-06 18:39:39,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:39,081 INFO L225 Difference]: With dead ends: 38 [2019-11-06 18:39:39,081 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 18:39:39,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:39,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 18:39:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-11-06 18:39:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 18:39:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-11-06 18:39:39,087 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2019-11-06 18:39:39,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:39,088 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-11-06 18:39:39,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:39:39,088 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-11-06 18:39:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:39:39,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:39,089 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:39,089 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:39,090 INFO L82 PathProgramCache]: Analyzing trace with hash -990062782, now seen corresponding path program 1 times [2019-11-06 18:39:39,090 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:39,090 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260919174] [2019-11-06 18:39:39,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:39,180 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260919174] [2019-11-06 18:39:39,180 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024319374] [2019-11-06 18:39:39,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:39:39,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:39,273 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:39,273 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:39:39,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970283337] [2019-11-06 18:39:39,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:39:39,275 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:39,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:39:39,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:39:39,276 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-11-06 18:39:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:39,376 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2019-11-06 18:39:39,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:39:39,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-06 18:39:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:39,378 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:39:39,378 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:39:39,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:39:39,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:39:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-06 18:39:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:39:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-06 18:39:39,385 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2019-11-06 18:39:39,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:39,385 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-06 18:39:39,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:39:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-06 18:39:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:39:39,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:39,387 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:39,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:39,592 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:39,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1464200924, now seen corresponding path program 2 times [2019-11-06 18:39:39,593 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:39,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621967808] [2019-11-06 18:39:39,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:39,693 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621967808] [2019-11-06 18:39:39,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546661585] [2019-11-06 18:39:39,694 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:39,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:39:39,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:39,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:39:39,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:39,813 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-06 18:39:39,814 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:39,817 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:39,817 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:39,818 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-06 18:39:39,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:39:39,866 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:39:39,866 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-11-06 18:39:39,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432411884] [2019-11-06 18:39:39,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:39:39,867 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:39,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:39:39,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:39:39,868 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 8 states. [2019-11-06 18:39:39,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:39,994 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2019-11-06 18:39:39,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:39:39,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-06 18:39:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:39,997 INFO L225 Difference]: With dead ends: 45 [2019-11-06 18:39:39,998 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:39:39,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:39:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:39:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2019-11-06 18:39:40,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 18:39:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2019-11-06 18:39:40,026 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2019-11-06 18:39:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:40,027 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2019-11-06 18:39:40,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:39:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2019-11-06 18:39:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:39:40,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:40,030 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:40,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:40,233 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:40,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2144259294, now seen corresponding path program 1 times [2019-11-06 18:39:40,234 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:40,234 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286386847] [2019-11-06 18:39:40,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:40,315 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286386847] [2019-11-06 18:39:40,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812565501] [2019-11-06 18:39:40,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:40,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:39:40,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:40,383 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:40,383 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:39:40,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629400442] [2019-11-06 18:39:40,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:39:40,384 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:40,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:39:40,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:40,386 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2019-11-06 18:39:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:40,466 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2019-11-06 18:39:40,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:39:40,466 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-11-06 18:39:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:40,469 INFO L225 Difference]: With dead ends: 75 [2019-11-06 18:39:40,469 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 18:39:40,470 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:40,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 18:39:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2019-11-06 18:39:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:39:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-11-06 18:39:40,477 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 22 [2019-11-06 18:39:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:40,478 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-11-06 18:39:40,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:39:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-11-06 18:39:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:39:40,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:40,479 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:40,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:40,680 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:40,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1680863843, now seen corresponding path program 1 times [2019-11-06 18:39:40,681 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:40,681 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617026545] [2019-11-06 18:39:40,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:39:40,786 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617026545] [2019-11-06 18:39:40,786 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65951790] [2019-11-06 18:39:40,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:40,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:39:40,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:39:40,847 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:40,847 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:39:40,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635174521] [2019-11-06 18:39:40,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:39:40,848 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:40,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:39:40,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:39:40,850 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2019-11-06 18:39:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:40,969 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2019-11-06 18:39:40,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:39:40,970 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-11-06 18:39:40,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:40,971 INFO L225 Difference]: With dead ends: 88 [2019-11-06 18:39:40,971 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:39:40,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:39:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:39:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2019-11-06 18:39:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:39:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2019-11-06 18:39:40,981 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2019-11-06 18:39:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:40,981 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2019-11-06 18:39:40,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:39:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2019-11-06 18:39:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:39:40,983 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:40,983 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:41,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:41,193 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:41,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:41,194 INFO L82 PathProgramCache]: Analyzing trace with hash 927761286, now seen corresponding path program 2 times [2019-11-06 18:39:41,194 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:41,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596464910] [2019-11-06 18:39:41,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:39:41,271 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596464910] [2019-11-06 18:39:41,272 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235669500] [2019-11-06 18:39:41,272 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 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 [2019-11-06 18:39:41,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:41,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:41,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:39:41,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:39:41,351 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:41,351 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:39:41,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17969412] [2019-11-06 18:39:41,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:39:41,354 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:41,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:39:41,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:39:41,355 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 9 states. [2019-11-06 18:39:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:41,455 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2019-11-06 18:39:41,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:39:41,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-06 18:39:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:41,457 INFO L225 Difference]: With dead ends: 102 [2019-11-06 18:39:41,457 INFO L226 Difference]: Without dead ends: 65 [2019-11-06 18:39:41,458 INFO L630 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 [2019-11-06 18:39:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-06 18:39:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2019-11-06 18:39:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 18:39:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2019-11-06 18:39:41,466 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 32 [2019-11-06 18:39:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:41,466 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2019-11-06 18:39:41,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:39:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2019-11-06 18:39:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:39:41,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:41,468 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:41,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:41,673 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:41,673 INFO L82 PathProgramCache]: Analyzing trace with hash 793377279, now seen corresponding path program 3 times [2019-11-06 18:39:41,674 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:41,674 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659486266] [2019-11-06 18:39:41,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-06 18:39:41,750 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659486266] [2019-11-06 18:39:41,750 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393253961] [2019-11-06 18:39:41,750 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 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 [2019-11-06 18:39:41,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:39:41,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:41,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:39:41,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:41,964 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:41,964 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2019-11-06 18:39:41,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:41,967 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:41,972 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:41,973 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:41,973 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-11-06 18:39:41,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 18:39:42,027 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:39:42,027 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2019-11-06 18:39:42,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088565737] [2019-11-06 18:39:42,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:39:42,028 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:39:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:39:42,029 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 10 states. [2019-11-06 18:39:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:42,250 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2019-11-06 18:39:42,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:39:42,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-11-06 18:39:42,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:42,251 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:39:42,251 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:39:42,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:39:42,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:39:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2019-11-06 18:39:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:39:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2019-11-06 18:39:42,273 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2019-11-06 18:39:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:42,276 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2019-11-06 18:39:42,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:39:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2019-11-06 18:39:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:39:42,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:42,277 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:42,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:42,491 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:42,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:42,491 INFO L82 PathProgramCache]: Analyzing trace with hash -587199816, now seen corresponding path program 1 times [2019-11-06 18:39:42,492 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:42,492 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153629653] [2019-11-06 18:39:42,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:39:42,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153629653] [2019-11-06 18:39:42,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507481575] [2019-11-06 18:39:42,572 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2019-11-06 18:39:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:42,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:39:42,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-06 18:39:42,656 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:42,656 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:39:42,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040211969] [2019-11-06 18:39:42,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:39:42,657 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:42,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:39:42,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:39:42,657 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 10 states. [2019-11-06 18:39:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:42,757 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2019-11-06 18:39:42,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:39:42,758 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-11-06 18:39:42,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:42,759 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:39:42,759 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 18:39:42,760 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:39:42,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 18:39:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-11-06 18:39:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:39:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-11-06 18:39:42,779 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 45 [2019-11-06 18:39:42,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:42,780 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-11-06 18:39:42,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:39:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-11-06 18:39:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:39:42,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:42,784 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:42,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:42,990 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash -924407389, now seen corresponding path program 2 times [2019-11-06 18:39:42,991 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:42,991 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19285238] [2019-11-06 18:39:42,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 18:39:43,116 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19285238] [2019-11-06 18:39:43,116 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467808708] [2019-11-06 18:39:43,116 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 [2019-11-06 18:39:43,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:43,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:43,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:39:43,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-06 18:39:43,188 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:43,188 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:39:43,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443077500] [2019-11-06 18:39:43,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:39:43,189 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:43,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:39:43,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:39:43,190 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 11 states. [2019-11-06 18:39:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:43,315 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2019-11-06 18:39:43,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:39:43,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2019-11-06 18:39:43,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:43,317 INFO L225 Difference]: With dead ends: 95 [2019-11-06 18:39:43,317 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:39:43,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:39:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:39:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-11-06 18:39:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:39:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-11-06 18:39:43,325 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 50 [2019-11-06 18:39:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:43,325 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-11-06 18:39:43,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:39:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-11-06 18:39:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 18:39:43,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:43,327 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:43,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:43,536 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:43,536 INFO L82 PathProgramCache]: Analyzing trace with hash -881740204, now seen corresponding path program 3 times [2019-11-06 18:39:43,537 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:43,537 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262788284] [2019-11-06 18:39:43,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-06 18:39:43,663 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262788284] [2019-11-06 18:39:43,663 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328954603] [2019-11-06 18:39:43,663 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 [2019-11-06 18:39:43,722 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:39:43,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:43,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:39:43,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:43,854 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-06 18:39:43,855 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:43,856 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:43,856 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:43,856 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-06 18:39:43,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 18:39:43,917 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:43,917 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2019-11-06 18:39:43,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163364567] [2019-11-06 18:39:43,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:39:43,918 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:43,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:39:43,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:39:43,919 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 22 states. [2019-11-06 18:39:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:44,807 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2019-11-06 18:39:44,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-06 18:39:44,807 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2019-11-06 18:39:44,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:44,809 INFO L225 Difference]: With dead ends: 139 [2019-11-06 18:39:44,809 INFO L226 Difference]: Without dead ends: 102 [2019-11-06 18:39:44,811 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=1645, Unknown=0, NotChecked=0, Total=1980 [2019-11-06 18:39:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-06 18:39:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2019-11-06 18:39:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:39:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2019-11-06 18:39:44,823 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 55 [2019-11-06 18:39:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:44,823 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2019-11-06 18:39:44,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:39:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2019-11-06 18:39:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 18:39:44,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:44,826 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:45,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:45,030 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:45,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:45,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1530684923, now seen corresponding path program 1 times [2019-11-06 18:39:45,031 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:45,031 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411559758] [2019-11-06 18:39:45,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:39:45,176 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411559758] [2019-11-06 18:39:45,177 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801300866] [2019-11-06 18:39:45,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:39:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:39:45,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-06 18:39:45,274 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:45,274 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:39:45,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321103342] [2019-11-06 18:39:45,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:39:45,275 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:45,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:39:45,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:39:45,276 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 13 states. [2019-11-06 18:39:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:45,439 INFO L93 Difference]: Finished difference Result 172 states and 210 transitions. [2019-11-06 18:39:45,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:39:45,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2019-11-06 18:39:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:45,440 INFO L225 Difference]: With dead ends: 172 [2019-11-06 18:39:45,441 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 18:39:45,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:39:45,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 18:39:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2019-11-06 18:39:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-06 18:39:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2019-11-06 18:39:45,452 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 60 [2019-11-06 18:39:45,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:45,452 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2019-11-06 18:39:45,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:39:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2019-11-06 18:39:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 18:39:45,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:45,454 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:45,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:45,658 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:45,659 INFO L82 PathProgramCache]: Analyzing trace with hash 486565358, now seen corresponding path program 2 times [2019-11-06 18:39:45,659 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:45,660 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893631241] [2019-11-06 18:39:45,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 18:39:45,811 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893631241] [2019-11-06 18:39:45,811 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470713680] [2019-11-06 18:39:45,811 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 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 [2019-11-06 18:39:45,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:45,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:45,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:39:45,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-06 18:39:45,915 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:45,915 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:39:45,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901961478] [2019-11-06 18:39:45,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:39:45,916 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:45,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:39:45,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:39:45,918 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 14 states. [2019-11-06 18:39:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:46,068 INFO L93 Difference]: Finished difference Result 186 states and 228 transitions. [2019-11-06 18:39:46,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:39:46,068 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2019-11-06 18:39:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:46,070 INFO L225 Difference]: With dead ends: 186 [2019-11-06 18:39:46,071 INFO L226 Difference]: Without dead ends: 112 [2019-11-06 18:39:46,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:39:46,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-06 18:39:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2019-11-06 18:39:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:39:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2019-11-06 18:39:46,082 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 65 [2019-11-06 18:39:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:46,082 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2019-11-06 18:39:46,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:39:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2019-11-06 18:39:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-06 18:39:46,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:46,084 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:46,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:46,295 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:46,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1479059049, now seen corresponding path program 3 times [2019-11-06 18:39:46,296 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:46,296 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484251419] [2019-11-06 18:39:46,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-06 18:39:46,440 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484251419] [2019-11-06 18:39:46,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892836501] [2019-11-06 18:39:46,441 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 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 [2019-11-06 18:39:46,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:39:46,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:46,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:39:46,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:46,778 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:46,779 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2019-11-06 18:39:46,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:46,781 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:46,784 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:46,785 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:46,785 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-11-06 18:39:46,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-06 18:39:46,847 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:46,847 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2019-11-06 18:39:46,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914887014] [2019-11-06 18:39:46,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:39:46,848 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:46,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:39:46,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:39:46,849 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand 28 states. [2019-11-06 18:39:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:49,704 INFO L93 Difference]: Finished difference Result 224 states and 270 transitions. [2019-11-06 18:39:49,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-11-06 18:39:49,705 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2019-11-06 18:39:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:49,706 INFO L225 Difference]: With dead ends: 224 [2019-11-06 18:39:49,706 INFO L226 Difference]: Without dead ends: 144 [2019-11-06 18:39:49,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1260, Invalid=5382, Unknown=0, NotChecked=0, Total=6642 [2019-11-06 18:39:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-06 18:39:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 86. [2019-11-06 18:39:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-06 18:39:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2019-11-06 18:39:49,719 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 70 [2019-11-06 18:39:49,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:49,719 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2019-11-06 18:39:49,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:39:49,719 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2019-11-06 18:39:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-06 18:39:49,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:49,720 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:49,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:49,924 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:49,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1699579203, now seen corresponding path program 4 times [2019-11-06 18:39:49,924 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:49,924 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144646365] [2019-11-06 18:39:49,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-11-06 18:39:50,069 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144646365] [2019-11-06 18:39:50,070 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226426091] [2019-11-06 18:39:50,070 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 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 [2019-11-06 18:39:50,137 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:39:50,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:50,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:39:50,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2019-11-06 18:39:50,168 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:50,168 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:39:50,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252200384] [2019-11-06 18:39:50,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:39:50,169 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:50,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:39:50,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:39:50,170 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 16 states. [2019-11-06 18:39:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:50,322 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2019-11-06 18:39:50,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:39:50,322 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 83 [2019-11-06 18:39:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:50,324 INFO L225 Difference]: With dead ends: 151 [2019-11-06 18:39:50,324 INFO L226 Difference]: Without dead ends: 94 [2019-11-06 18:39:50,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:39:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-06 18:39:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2019-11-06 18:39:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:39:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2019-11-06 18:39:50,334 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 83 [2019-11-06 18:39:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:50,334 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2019-11-06 18:39:50,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:39:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2019-11-06 18:39:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 18:39:50,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:50,335 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:50,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:50,539 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:50,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1566010490, now seen corresponding path program 5 times [2019-11-06 18:39:50,540 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:50,540 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859678648] [2019-11-06 18:39:50,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 18:39:50,712 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859678648] [2019-11-06 18:39:50,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648085628] [2019-11-06 18:39:50,713 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 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 [2019-11-06 18:39:51,018 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-06 18:39:51,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:51,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:39:51,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-06 18:39:51,035 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:51,035 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2019-11-06 18:39:51,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216106721] [2019-11-06 18:39:51,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:39:51,036 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:51,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:39:51,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:39:51,037 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 16 states. [2019-11-06 18:39:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:51,182 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2019-11-06 18:39:51,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:39:51,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2019-11-06 18:39:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:51,184 INFO L225 Difference]: With dead ends: 159 [2019-11-06 18:39:51,184 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 18:39:51,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:39:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 18:39:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2019-11-06 18:39:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-06 18:39:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2019-11-06 18:39:51,192 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 88 [2019-11-06 18:39:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:51,194 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2019-11-06 18:39:51,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:39:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2019-11-06 18:39:51,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-06 18:39:51,195 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:51,195 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:51,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:51,408 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:51,408 INFO L82 PathProgramCache]: Analyzing trace with hash 32199903, now seen corresponding path program 6 times [2019-11-06 18:39:51,408 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:51,408 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351422638] [2019-11-06 18:39:51,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 4 proven. 169 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-06 18:39:51,583 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351422638] [2019-11-06 18:39:51,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848719909] [2019-11-06 18:39:51,584 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 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 [2019-11-06 18:39:51,726 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-06 18:39:51,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:51,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:39:51,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:51,954 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-06 18:39:51,955 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:51,958 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:51,958 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:51,958 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-06 18:39:51,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-06 18:39:52,039 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:52,039 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2019-11-06 18:39:52,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112268903] [2019-11-06 18:39:52,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:39:52,040 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:52,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:39:52,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:39:52,041 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 30 states. [2019-11-06 18:39:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:53,482 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2019-11-06 18:39:53,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-06 18:39:53,482 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2019-11-06 18:39:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:53,484 INFO L225 Difference]: With dead ends: 222 [2019-11-06 18:39:53,484 INFO L226 Difference]: Without dead ends: 159 [2019-11-06 18:39:53,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=3287, Unknown=0, NotChecked=0, Total=4032 [2019-11-06 18:39:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-06 18:39:53,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2019-11-06 18:39:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-06 18:39:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 176 transitions. [2019-11-06 18:39:53,501 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 176 transitions. Word has length 93 [2019-11-06 18:39:53,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:53,502 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 176 transitions. [2019-11-06 18:39:53,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:39:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 176 transitions. [2019-11-06 18:39:53,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:39:53,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:53,503 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:53,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:53,708 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:53,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:53,708 INFO L82 PathProgramCache]: Analyzing trace with hash 499376616, now seen corresponding path program 4 times [2019-11-06 18:39:53,708 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:53,709 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409904436] [2019-11-06 18:39:53,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2019-11-06 18:39:53,941 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409904436] [2019-11-06 18:39:53,941 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579027194] [2019-11-06 18:39:53,941 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 [2019-11-06 18:39:54,023 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:39:54,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:54,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:39:54,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-11-06 18:39:54,043 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:54,043 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:39:54,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327361780] [2019-11-06 18:39:54,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:39:54,044 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:54,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:39:54,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:39:54,044 INFO L87 Difference]: Start difference. First operand 148 states and 176 transitions. Second operand 19 states. [2019-11-06 18:39:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:54,262 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2019-11-06 18:39:54,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:39:54,262 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2019-11-06 18:39:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:54,264 INFO L225 Difference]: With dead ends: 274 [2019-11-06 18:39:54,264 INFO L226 Difference]: Without dead ends: 161 [2019-11-06 18:39:54,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:39:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-06 18:39:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2019-11-06 18:39:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-06 18:39:54,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 186 transitions. [2019-11-06 18:39:54,277 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 186 transitions. Word has length 98 [2019-11-06 18:39:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:54,277 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 186 transitions. [2019-11-06 18:39:54,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:39:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 186 transitions. [2019-11-06 18:39:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 18:39:54,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:54,279 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 13, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:54,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:54,483 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1961194887, now seen corresponding path program 5 times [2019-11-06 18:39:54,484 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:54,484 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592384398] [2019-11-06 18:39:54,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 4 proven. 225 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2019-11-06 18:39:54,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592384398] [2019-11-06 18:39:54,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757291053] [2019-11-06 18:39:54,694 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 [2019-11-06 18:39:54,920 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-06 18:39:54,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:54,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:39:54,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-11-06 18:39:54,948 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:54,948 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-11-06 18:39:54,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82508706] [2019-11-06 18:39:54,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:39:54,955 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:54,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:39:54,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:39:54,956 INFO L87 Difference]: Start difference. First operand 156 states and 186 transitions. Second operand 20 states. [2019-11-06 18:39:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:55,175 INFO L93 Difference]: Finished difference Result 288 states and 354 transitions. [2019-11-06 18:39:55,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:39:55,175 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2019-11-06 18:39:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:55,177 INFO L225 Difference]: With dead ends: 288 [2019-11-06 18:39:55,177 INFO L226 Difference]: Without dead ends: 169 [2019-11-06 18:39:55,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:39:55,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-11-06 18:39:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2019-11-06 18:39:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-06 18:39:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2019-11-06 18:39:55,190 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 103 [2019-11-06 18:39:55,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:55,190 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2019-11-06 18:39:55,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:39:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2019-11-06 18:39:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-06 18:39:55,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:55,192 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 14, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:55,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:55,396 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -644683188, now seen corresponding path program 6 times [2019-11-06 18:39:55,397 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:55,397 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84963887] [2019-11-06 18:39:55,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 4 proven. 256 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-06 18:39:55,620 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84963887] [2019-11-06 18:39:55,620 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285007106] [2019-11-06 18:39:55,620 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 [2019-11-06 18:39:55,730 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-06 18:39:55,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:55,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 18:39:55,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:56,224 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:56,225 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2019-11-06 18:39:56,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:56,226 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:56,230 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:56,230 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:56,230 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-11-06 18:39:56,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2019-11-06 18:39:56,326 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:56,326 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2019-11-06 18:39:56,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546277773] [2019-11-06 18:39:56,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:39:56,327 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:56,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:39:56,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:39:56,328 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 36 states. [2019-11-06 18:39:59,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:59,973 INFO L93 Difference]: Finished difference Result 330 states and 399 transitions. [2019-11-06 18:39:59,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-11-06 18:39:59,973 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 108 [2019-11-06 18:39:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:59,975 INFO L225 Difference]: With dead ends: 330 [2019-11-06 18:39:59,976 INFO L226 Difference]: Without dead ends: 205 [2019-11-06 18:39:59,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4233 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2653, Invalid=10457, Unknown=0, NotChecked=0, Total=13110 [2019-11-06 18:39:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-11-06 18:39:59,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 124. [2019-11-06 18:39:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-06 18:39:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2019-11-06 18:39:59,989 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 108 [2019-11-06 18:39:59,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:59,990 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2019-11-06 18:39:59,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:39:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2019-11-06 18:39:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 18:39:59,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:59,991 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:00,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:00,195 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash -712675122, now seen corresponding path program 7 times [2019-11-06 18:40:00,195 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:00,195 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050809878] [2019-11-06 18:40:00,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 6 proven. 289 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-06 18:40:00,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050809878] [2019-11-06 18:40:00,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079511106] [2019-11-06 18:40:00,420 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 [2019-11-06 18:40:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:00,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:40:00,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2019-11-06 18:40:00,524 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:00,524 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-11-06 18:40:00,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096148072] [2019-11-06 18:40:00,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:40:00,525 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:00,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:40:00,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:40:00,525 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand 22 states. [2019-11-06 18:40:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:00,764 INFO L93 Difference]: Finished difference Result 215 states and 254 transitions. [2019-11-06 18:40:00,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:40:00,767 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2019-11-06 18:40:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:00,769 INFO L225 Difference]: With dead ends: 215 [2019-11-06 18:40:00,769 INFO L226 Difference]: Without dead ends: 132 [2019-11-06 18:40:00,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:40:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-06 18:40:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2019-11-06 18:40:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-06 18:40:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2019-11-06 18:40:00,777 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 121 [2019-11-06 18:40:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:00,778 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2019-11-06 18:40:00,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:40:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2019-11-06 18:40:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 18:40:00,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:00,779 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:00,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:00,981 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:00,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:00,982 INFO L82 PathProgramCache]: Analyzing trace with hash -110502295, now seen corresponding path program 8 times [2019-11-06 18:40:00,982 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:00,982 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010403265] [2019-11-06 18:40:00,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 6 proven. 324 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2019-11-06 18:40:01,275 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010403265] [2019-11-06 18:40:01,276 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620902653] [2019-11-06 18:40:01,276 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 [2019-11-06 18:40:01,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:01,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:01,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-06 18:40:01,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2019-11-06 18:40:01,409 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:01,409 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-11-06 18:40:01,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868618478] [2019-11-06 18:40:01,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-06 18:40:01,412 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-06 18:40:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:40:01,413 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand 23 states. [2019-11-06 18:40:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:01,663 INFO L93 Difference]: Finished difference Result 223 states and 264 transitions. [2019-11-06 18:40:01,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:40:01,664 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 126 [2019-11-06 18:40:01,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:01,665 INFO L225 Difference]: With dead ends: 223 [2019-11-06 18:40:01,666 INFO L226 Difference]: Without dead ends: 137 [2019-11-06 18:40:01,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:40:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-06 18:40:01,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2019-11-06 18:40:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-06 18:40:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2019-11-06 18:40:01,676 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 126 [2019-11-06 18:40:01,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:01,677 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2019-11-06 18:40:01,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-06 18:40:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2019-11-06 18:40:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 18:40:01,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:01,678 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:01,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:01,882 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:01,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:01,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1997593494, now seen corresponding path program 9 times [2019-11-06 18:40:01,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:01,883 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280390776] [2019-11-06 18:40:01,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 6 proven. 361 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-11-06 18:40:02,151 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280390776] [2019-11-06 18:40:02,151 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789835866] [2019-11-06 18:40:02,152 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 [2019-11-06 18:40:02,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:40:02,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:02,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 18:40:02,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:02,482 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-06 18:40:02,482 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:40:02,484 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:40:02,484 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:40:02,485 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-06 18:40:02,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:40:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 11 proven. 151 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2019-11-06 18:40:02,580 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:02,580 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 38 [2019-11-06 18:40:02,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561987436] [2019-11-06 18:40:02,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-06 18:40:02,581 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:02,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-06 18:40:02,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:40:02,582 INFO L87 Difference]: Start difference. First operand 134 states and 154 transitions. Second operand 38 states. [2019-11-06 18:40:04,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:04,514 INFO L93 Difference]: Finished difference Result 305 states and 371 transitions. [2019-11-06 18:40:04,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-06 18:40:04,514 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 131 [2019-11-06 18:40:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:04,516 INFO L225 Difference]: With dead ends: 305 [2019-11-06 18:40:04,516 INFO L226 Difference]: Without dead ends: 216 [2019-11-06 18:40:04,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1337, Invalid=5469, Unknown=0, NotChecked=0, Total=6806 [2019-11-06 18:40:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-06 18:40:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 205. [2019-11-06 18:40:04,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-11-06 18:40:04,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 245 transitions. [2019-11-06 18:40:04,537 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 245 transitions. Word has length 131 [2019-11-06 18:40:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:04,538 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 245 transitions. [2019-11-06 18:40:04,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-06 18:40:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 245 transitions. [2019-11-06 18:40:04,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 18:40:04,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:04,541 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 18, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:04,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:04,745 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:04,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:04,745 INFO L82 PathProgramCache]: Analyzing trace with hash 459393739, now seen corresponding path program 7 times [2019-11-06 18:40:04,746 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:04,746 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016124176] [2019-11-06 18:40:04,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 6 proven. 400 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2019-11-06 18:40:05,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016124176] [2019-11-06 18:40:05,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628977248] [2019-11-06 18:40:05,032 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 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 [2019-11-06 18:40:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:05,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:40:05,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2019-11-06 18:40:05,236 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:05,237 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:40:05,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898815568] [2019-11-06 18:40:05,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:40:05,238 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:05,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:40:05,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:40:05,239 INFO L87 Difference]: Start difference. First operand 205 states and 245 transitions. Second operand 25 states. [2019-11-06 18:40:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:05,558 INFO L93 Difference]: Finished difference Result 376 states and 462 transitions. [2019-11-06 18:40:05,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:40:05,558 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2019-11-06 18:40:05,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:05,560 INFO L225 Difference]: With dead ends: 376 [2019-11-06 18:40:05,561 INFO L226 Difference]: Without dead ends: 218 [2019-11-06 18:40:05,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:40:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-11-06 18:40:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2019-11-06 18:40:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-11-06 18:40:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 255 transitions. [2019-11-06 18:40:05,586 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 255 transitions. Word has length 136 [2019-11-06 18:40:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:05,587 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 255 transitions. [2019-11-06 18:40:05,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:40:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 255 transitions. [2019-11-06 18:40:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 18:40:05,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:05,589 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 19, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:05,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:05,795 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:05,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:05,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1675845628, now seen corresponding path program 8 times [2019-11-06 18:40:05,795 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:05,795 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895057091] [2019-11-06 18:40:05,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 6 proven. 441 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2019-11-06 18:40:06,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895057091] [2019-11-06 18:40:06,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046992619] [2019-11-06 18:40:06,173 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 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 [2019-11-06 18:40:06,273 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:06,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:06,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 18:40:06,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2019-11-06 18:40:06,297 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:06,297 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-11-06 18:40:06,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909085154] [2019-11-06 18:40:06,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 18:40:06,297 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:06,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 18:40:06,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:40:06,298 INFO L87 Difference]: Start difference. First operand 213 states and 255 transitions. Second operand 26 states. [2019-11-06 18:40:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:06,597 INFO L93 Difference]: Finished difference Result 390 states and 480 transitions. [2019-11-06 18:40:06,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 18:40:06,598 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 141 [2019-11-06 18:40:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:06,600 INFO L225 Difference]: With dead ends: 390 [2019-11-06 18:40:06,600 INFO L226 Difference]: Without dead ends: 226 [2019-11-06 18:40:06,602 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:40:06,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-11-06 18:40:06,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 221. [2019-11-06 18:40:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-11-06 18:40:06,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 265 transitions. [2019-11-06 18:40:06,627 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 265 transitions. Word has length 141 [2019-11-06 18:40:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:06,627 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 265 transitions. [2019-11-06 18:40:06,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 18:40:06,628 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 265 transitions. [2019-11-06 18:40:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 18:40:06,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:06,630 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 20, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:06,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:06,836 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:06,836 INFO L82 PathProgramCache]: Analyzing trace with hash 528158511, now seen corresponding path program 9 times [2019-11-06 18:40:06,837 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:06,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594316790] [2019-11-06 18:40:06,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 6 proven. 484 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2019-11-06 18:40:07,150 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594316790] [2019-11-06 18:40:07,150 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870108418] [2019-11-06 18:40:07,150 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 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 [2019-11-06 18:40:07,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:40:07,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:07,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-06 18:40:07,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:07,822 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:40:07,823 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2019-11-06 18:40:07,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:40:07,825 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:40:07,832 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:40:07,833 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:40:07,833 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-11-06 18:40:07,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:40:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 59 proven. 180 refuted. 0 times theorem prover too weak. 932 trivial. 0 not checked. [2019-11-06 18:40:07,948 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:07,948 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 44 [2019-11-06 18:40:07,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753005249] [2019-11-06 18:40:07,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-06 18:40:07,949 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:07,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-06 18:40:07,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2019-11-06 18:40:07,950 INFO L87 Difference]: Start difference. First operand 221 states and 265 transitions. Second operand 44 states. [2019-11-06 18:40:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:13,046 INFO L93 Difference]: Finished difference Result 436 states and 528 transitions. [2019-11-06 18:40:13,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2019-11-06 18:40:13,047 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 146 [2019-11-06 18:40:13,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:13,048 INFO L225 Difference]: With dead ends: 436 [2019-11-06 18:40:13,048 INFO L226 Difference]: Without dead ends: 266 [2019-11-06 18:40:13,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7426 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4578, Invalid=17178, Unknown=0, NotChecked=0, Total=21756 [2019-11-06 18:40:13,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-11-06 18:40:13,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 162. [2019-11-06 18:40:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-06 18:40:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2019-11-06 18:40:13,067 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 146 [2019-11-06 18:40:13,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:13,067 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2019-11-06 18:40:13,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-06 18:40:13,067 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2019-11-06 18:40:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-06 18:40:13,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:13,069 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:13,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:13,273 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:13,273 INFO L82 PathProgramCache]: Analyzing trace with hash -45740711, now seen corresponding path program 10 times [2019-11-06 18:40:13,274 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:13,274 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973708796] [2019-11-06 18:40:13,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1308 backedges. 8 proven. 529 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2019-11-06 18:40:13,792 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973708796] [2019-11-06 18:40:13,792 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386526054] [2019-11-06 18:40:13,793 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 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 [2019-11-06 18:40:13,903 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:40:13,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:13,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:40:13,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1308 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2019-11-06 18:40:13,930 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:13,931 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-11-06 18:40:13,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019877401] [2019-11-06 18:40:13,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:40:13,931 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:13,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:40:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:40:13,932 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand 28 states. [2019-11-06 18:40:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:14,265 INFO L93 Difference]: Finished difference Result 279 states and 330 transitions. [2019-11-06 18:40:14,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 18:40:14,265 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2019-11-06 18:40:14,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:14,267 INFO L225 Difference]: With dead ends: 279 [2019-11-06 18:40:14,267 INFO L226 Difference]: Without dead ends: 170 [2019-11-06 18:40:14,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:40:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-06 18:40:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2019-11-06 18:40:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-11-06 18:40:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 192 transitions. [2019-11-06 18:40:14,280 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 192 transitions. Word has length 159 [2019-11-06 18:40:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:14,280 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 192 transitions. [2019-11-06 18:40:14,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:40:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 192 transitions. [2019-11-06 18:40:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-06 18:40:14,281 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:14,282 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:14,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:14,486 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash 52054604, now seen corresponding path program 11 times [2019-11-06 18:40:14,486 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:14,486 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387471995] [2019-11-06 18:40:14,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 8 proven. 576 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2019-11-06 18:40:14,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387471995] [2019-11-06 18:40:14,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752158062] [2019-11-06 18:40:14,868 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-06 18:40:15,798 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-06 18:40:15,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:15,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 18:40:15,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2019-11-06 18:40:15,858 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:15,858 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-11-06 18:40:15,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521087399] [2019-11-06 18:40:15,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-06 18:40:15,859 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-06 18:40:15,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:40:15,860 INFO L87 Difference]: Start difference. First operand 167 states and 192 transitions. Second operand 29 states. [2019-11-06 18:40:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:16,260 INFO L93 Difference]: Finished difference Result 287 states and 340 transitions. [2019-11-06 18:40:16,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:40:16,261 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 164 [2019-11-06 18:40:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:16,262 INFO L225 Difference]: With dead ends: 287 [2019-11-06 18:40:16,263 INFO L226 Difference]: Without dead ends: 175 [2019-11-06 18:40:16,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:40:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-06 18:40:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2019-11-06 18:40:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-06 18:40:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 198 transitions. [2019-11-06 18:40:16,289 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 198 transitions. Word has length 164 [2019-11-06 18:40:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:16,290 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 198 transitions. [2019-11-06 18:40:16,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-06 18:40:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 198 transitions. [2019-11-06 18:40:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-06 18:40:16,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:16,292 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:16,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:16,500 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:16,501 INFO L82 PathProgramCache]: Analyzing trace with hash 173761781, now seen corresponding path program 12 times [2019-11-06 18:40:16,501 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:16,501 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130532480] [2019-11-06 18:40:16,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 8 proven. 625 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2019-11-06 18:40:17,154 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130532480] [2019-11-06 18:40:17,155 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041911565] [2019-11-06 18:40:17,155 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 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 [2019-11-06 18:40:18,045 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-11-06 18:40:18,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:18,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-06 18:40:18,050 INFO L279 TraceCheckSpWp]: Computing forward predicates...