/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/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:25:29,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:25:29,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:25:29,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:25:29,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:25:29,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:25:29,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:25:29,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:25:29,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:25:29,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:25:29,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:25:29,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:25:29,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:25:29,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:25:29,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:25:29,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:25:29,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:25:29,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:25:29,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:25:29,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:25:29,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:25:29,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:25:29,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:25:29,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:25:29,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:25:29,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:25:29,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:25:29,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:25:29,278 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 21:25:29,310 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:25:29,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:25:29,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:25:29,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:25:29,312 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:25:29,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:25:29,315 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:25:29,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:25:29,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:25:29,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:25:29,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:25:29,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:25:29,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:25:29,317 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:25:29,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:25:29,320 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:25:29,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:25:29,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:25:29,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:25:29,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:25:29,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:25:29,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:25:29,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:25:29,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:25:29,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:25:29,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:25:29,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:25:29,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:25:29,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:25:29,621 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:25:29,638 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:25:29,643 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:25:29,645 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:25:29,645 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:25:29,646 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2019-11-06 21:25:29,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00ea63836/a5c6d9d21feb47858ca00366db5d44de/FLAG48c890adf [2019-11-06 21:25:30,136 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:25:30,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2019-11-06 21:25:30,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00ea63836/a5c6d9d21feb47858ca00366db5d44de/FLAG48c890adf [2019-11-06 21:25:30,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00ea63836/a5c6d9d21feb47858ca00366db5d44de [2019-11-06 21:25:30,531 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:25:30,533 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:25:30,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:25:30,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:25:30,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:25:30,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:25:30" (1/1) ... [2019-11-06 21:25:30,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229e4b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:30, skipping insertion in model container [2019-11-06 21:25:30,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:25:30" (1/1) ... [2019-11-06 21:25:30,549 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:25:30,570 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:25:30,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:25:30,747 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:25:30,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:25:30,883 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:25:30,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:30 WrapperNode [2019-11-06 21:25:30,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:25:30,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:25:30,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:25:30,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:25:30,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:30" (1/1) ... [2019-11-06 21:25:30,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:30" (1/1) ... [2019-11-06 21:25:30,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:30" (1/1) ... [2019-11-06 21:25:30,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:30" (1/1) ... [2019-11-06 21:25:30,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:30" (1/1) ... [2019-11-06 21:25:30,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:30" (1/1) ... [2019-11-06 21:25:30,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:30" (1/1) ... [2019-11-06 21:25:30,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:25:30,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:25:30,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:25:30,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:25:30,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:30" (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 21:25:30,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:25:30,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:25:30,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:25:30,984 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:25:30,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:25:30,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:25:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-06 21:25:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:25:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 21:25:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-06 21:25:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:25:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:25:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:25:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:25:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:25:31,347 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:25:31,348 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 21:25:31,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:25:31 BoogieIcfgContainer [2019-11-06 21:25:31,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:25:31,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:25:31,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:25:31,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:25:31,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:25:30" (1/3) ... [2019-11-06 21:25:31,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2bb3d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:25:31, skipping insertion in model container [2019-11-06 21:25:31,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:30" (2/3) ... [2019-11-06 21:25:31,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2bb3d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:25:31, skipping insertion in model container [2019-11-06 21:25:31,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:25:31" (3/3) ... [2019-11-06 21:25:31,372 INFO L109 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2019-11-06 21:25:31,382 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:25:31,392 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:25:31,403 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:25:31,438 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:25:31,438 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:25:31,438 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:25:31,438 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:25:31,439 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:25:31,439 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:25:31,439 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:25:31,439 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:25:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-06 21:25:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 21:25:31,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:31,478 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 21:25:31,479 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:31,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:31,484 INFO L82 PathProgramCache]: Analyzing trace with hash 907546272, now seen corresponding path program 1 times [2019-11-06 21:25:31,490 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:31,491 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798765876] [2019-11-06 21:25:31,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:31,675 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 21:25:31,676 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798765876] [2019-11-06 21:25:31,679 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:25:31,679 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 21:25:31,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833821021] [2019-11-06 21:25:31,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 21:25:31,689 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:31,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 21:25:31,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:25:31,706 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2019-11-06 21:25:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:31,848 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2019-11-06 21:25:31,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:25:31,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-06 21:25:31,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:31,859 INFO L225 Difference]: With dead ends: 64 [2019-11-06 21:25:31,859 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 21:25:31,862 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 21:25:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 21:25:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-06 21:25:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 21:25:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-11-06 21:25:31,903 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2019-11-06 21:25:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:31,904 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-11-06 21:25:31,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 21:25:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-11-06 21:25:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 21:25:31,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:31,906 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:31,906 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:31,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:31,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1455815888, now seen corresponding path program 1 times [2019-11-06 21:25:31,907 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:31,907 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157339821] [2019-11-06 21:25:31,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:32,037 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 21:25:32,041 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157339821] [2019-11-06 21:25:32,042 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:25:32,042 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:25:32,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009969141] [2019-11-06 21:25:32,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:25:32,044 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:32,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:25:32,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:25:32,045 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 4 states. [2019-11-06 21:25:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:32,206 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2019-11-06 21:25:32,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:25:32,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-06 21:25:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:32,211 INFO L225 Difference]: With dead ends: 65 [2019-11-06 21:25:32,211 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 21:25:32,214 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 21:25:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 21:25:32,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2019-11-06 21:25:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 21:25:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-06 21:25:32,231 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2019-11-06 21:25:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:32,232 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-06 21:25:32,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:25:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-06 21:25:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 21:25:32,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:32,234 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:32,235 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:32,236 INFO L82 PathProgramCache]: Analyzing trace with hash -941161554, now seen corresponding path program 1 times [2019-11-06 21:25:32,237 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:32,237 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105342439] [2019-11-06 21:25:32,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:32,363 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105342439] [2019-11-06 21:25:32,363 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052179955] [2019-11-06 21:25:32,363 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 21:25:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:32,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 21:25:32,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:32,516 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 21:25:32,517 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:32,517 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2019-11-06 21:25:32,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142345750] [2019-11-06 21:25:32,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:25:32,518 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:32,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:25:32,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:32,521 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 6 states. [2019-11-06 21:25:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:32,570 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2019-11-06 21:25:32,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:25:32,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-06 21:25:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:32,572 INFO L225 Difference]: With dead ends: 54 [2019-11-06 21:25:32,572 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 21:25:32,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:25:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 21:25:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2019-11-06 21:25:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 21:25:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2019-11-06 21:25:32,581 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2019-11-06 21:25:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:32,582 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2019-11-06 21:25:32,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:25:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2019-11-06 21:25:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 21:25:32,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:32,583 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:32,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:32,787 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:32,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1722235897, now seen corresponding path program 1 times [2019-11-06 21:25:32,788 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:32,788 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883579059] [2019-11-06 21:25:32,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 21:25:32,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883579059] [2019-11-06 21:25:32,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091896767] [2019-11-06 21:25:32,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:25:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:32,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 21:25:33,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 21:25:33,028 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:33,029 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-11-06 21:25:33,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111244239] [2019-11-06 21:25:33,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:25:33,031 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:33,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:25:33,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:25:33,032 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 4 states. [2019-11-06 21:25:33,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:33,109 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2019-11-06 21:25:33,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:25:33,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-06 21:25:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:33,115 INFO L225 Difference]: With dead ends: 99 [2019-11-06 21:25:33,115 INFO L226 Difference]: Without dead ends: 70 [2019-11-06 21:25:33,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:25:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-06 21:25:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2019-11-06 21:25:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 21:25:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2019-11-06 21:25:33,130 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2019-11-06 21:25:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:33,130 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2019-11-06 21:25:33,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:25:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2019-11-06 21:25:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:25:33,137 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:33,137 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:33,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:33,351 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:33,353 INFO L82 PathProgramCache]: Analyzing trace with hash 322541692, now seen corresponding path program 1 times [2019-11-06 21:25:33,353 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:33,354 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166317255] [2019-11-06 21:25:33,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:25:33,466 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166317255] [2019-11-06 21:25:33,466 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777294828] [2019-11-06 21:25:33,466 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 21:25:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:33,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 21:25:33,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:33,671 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 21:25:33,672 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:25:33,684 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:25:33,685 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 21:25:33,685 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-06 21:25:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:25:33,702 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:33,702 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2019-11-06 21:25:33,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002485635] [2019-11-06 21:25:33,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:25:33,703 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:33,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:25:33,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:25:33,704 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 12 states. [2019-11-06 21:25:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:34,053 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2019-11-06 21:25:34,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:25:34,054 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-11-06 21:25:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:34,055 INFO L225 Difference]: With dead ends: 137 [2019-11-06 21:25:34,055 INFO L226 Difference]: Without dead ends: 95 [2019-11-06 21:25:34,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2019-11-06 21:25:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-06 21:25:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2019-11-06 21:25:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 21:25:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2019-11-06 21:25:34,071 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 28 [2019-11-06 21:25:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:34,072 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2019-11-06 21:25:34,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:25:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2019-11-06 21:25:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 21:25:34,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:34,074 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:34,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:34,279 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:34,280 INFO L82 PathProgramCache]: Analyzing trace with hash -494939968, now seen corresponding path program 1 times [2019-11-06 21:25:34,281 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:34,281 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028687407] [2019-11-06 21:25:34,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:25:34,386 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028687407] [2019-11-06 21:25:34,387 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750969375] [2019-11-06 21:25:34,387 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 21:25:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:34,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 21:25:34,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:34,542 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 16 treesize of output 8 [2019-11-06 21:25:34,543 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:25:34,544 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:25:34,545 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 21:25:34,545 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-11-06 21:25:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:25:34,559 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:34,560 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2019-11-06 21:25:34,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243296403] [2019-11-06 21:25:34,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 21:25:34,561 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:34,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 21:25:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:25:34,561 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 13 states. [2019-11-06 21:25:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:34,913 INFO L93 Difference]: Finished difference Result 156 states and 212 transitions. [2019-11-06 21:25:34,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 21:25:34,915 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2019-11-06 21:25:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:34,917 INFO L225 Difference]: With dead ends: 156 [2019-11-06 21:25:34,917 INFO L226 Difference]: Without dead ends: 121 [2019-11-06 21:25:34,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2019-11-06 21:25:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-06 21:25:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 50. [2019-11-06 21:25:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 21:25:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2019-11-06 21:25:34,940 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 31 [2019-11-06 21:25:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:34,940 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2019-11-06 21:25:34,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 21:25:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2019-11-06 21:25:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 21:25:34,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:34,943 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:35,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:35,144 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:35,144 INFO L82 PathProgramCache]: Analyzing trace with hash 746697925, now seen corresponding path program 1 times [2019-11-06 21:25:35,145 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:35,145 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788878535] [2019-11-06 21:25:35,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:35,264 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 21:25:35,265 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788878535] [2019-11-06 21:25:35,265 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655506847] [2019-11-06 21:25:35,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:25:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:35,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 21:25:35,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:25:35,365 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:35,365 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2019-11-06 21:25:35,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699894977] [2019-11-06 21:25:35,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:25:35,366 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:35,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:25:35,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:35,367 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 9 states. [2019-11-06 21:25:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:35,928 INFO L93 Difference]: Finished difference Result 303 states and 447 transitions. [2019-11-06 21:25:35,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 21:25:35,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-11-06 21:25:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:35,930 INFO L225 Difference]: With dead ends: 303 [2019-11-06 21:25:35,930 INFO L226 Difference]: Without dead ends: 266 [2019-11-06 21:25:35,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-11-06 21:25:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-11-06 21:25:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 68. [2019-11-06 21:25:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-06 21:25:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2019-11-06 21:25:35,944 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 34 [2019-11-06 21:25:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:35,944 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2019-11-06 21:25:35,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:25:35,944 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2019-11-06 21:25:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 21:25:35,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:35,946 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:36,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:36,152 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:36,152 INFO L82 PathProgramCache]: Analyzing trace with hash 108624021, now seen corresponding path program 2 times [2019-11-06 21:25:36,153 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:36,153 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809279260] [2019-11-06 21:25:36,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 21:25:36,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809279260] [2019-11-06 21:25:36,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77468431] [2019-11-06 21:25:36,302 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 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 21:25:36,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:36,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:36,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 21:25:36,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:25:36,416 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:36,416 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2019-11-06 21:25:36,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642733569] [2019-11-06 21:25:36,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:25:36,417 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:36,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:25:36,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:36,417 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 11 states. [2019-11-06 21:25:37,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:37,304 INFO L93 Difference]: Finished difference Result 442 states and 618 transitions. [2019-11-06 21:25:37,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 21:25:37,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-11-06 21:25:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:37,308 INFO L225 Difference]: With dead ends: 442 [2019-11-06 21:25:37,308 INFO L226 Difference]: Without dead ends: 389 [2019-11-06 21:25:37,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2019-11-06 21:25:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2019-11-06 21:25:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 82. [2019-11-06 21:25:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-06 21:25:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2019-11-06 21:25:37,323 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 39 [2019-11-06 21:25:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:37,324 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2019-11-06 21:25:37,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:25:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2019-11-06 21:25:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 21:25:37,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:37,325 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:37,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:37,538 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:37,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:37,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2007709385, now seen corresponding path program 3 times [2019-11-06 21:25:37,539 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:37,540 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119120493] [2019-11-06 21:25:37,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 21:25:37,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119120493] [2019-11-06 21:25:37,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131013346] [2019-11-06 21:25:37,665 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 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 21:25:37,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:25:37,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:37,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 21:25:37,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:37,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:25:37,854 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 21:25:37,858 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2019-11-06 21:25:37,859 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:25:37,863 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 21:25:37,863 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:25:37,869 INFO L567 ElimStorePlain]: treesize reduction 6, result has 33.3 percent of original size [2019-11-06 21:25:37,870 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 21:25:37,870 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:64, output treesize:3 [2019-11-06 21:25:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 21:25:37,906 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:37,906 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-06 21:25:37,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624127780] [2019-11-06 21:25:37,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 21:25:37,910 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:37,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 21:25:37,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:25:37,911 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand 16 states. [2019-11-06 21:25:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:38,871 INFO L93 Difference]: Finished difference Result 677 states and 901 transitions. [2019-11-06 21:25:38,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 21:25:38,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2019-11-06 21:25:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:38,876 INFO L225 Difference]: With dead ends: 677 [2019-11-06 21:25:38,876 INFO L226 Difference]: Without dead ends: 612 [2019-11-06 21:25:38,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2019-11-06 21:25:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-06 21:25:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 110. [2019-11-06 21:25:38,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-06 21:25:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 138 transitions. [2019-11-06 21:25:38,897 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 138 transitions. Word has length 44 [2019-11-06 21:25:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:38,898 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 138 transitions. [2019-11-06 21:25:38,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 21:25:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 138 transitions. [2019-11-06 21:25:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 21:25:38,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:38,900 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:39,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:39,103 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:39,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:39,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1232135728, now seen corresponding path program 4 times [2019-11-06 21:25:39,104 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:39,104 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843925273] [2019-11-06 21:25:39,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-06 21:25:39,250 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843925273] [2019-11-06 21:25:39,251 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399114983] [2019-11-06 21:25:39,251 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 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 21:25:39,331 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:25:39,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:39,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 21:25:39,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:25:39,406 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:39,406 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2019-11-06 21:25:39,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637837114] [2019-11-06 21:25:39,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 21:25:39,407 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:39,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 21:25:39,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:25:39,408 INFO L87 Difference]: Start difference. First operand 110 states and 138 transitions. Second operand 14 states. [2019-11-06 21:25:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:41,273 INFO L93 Difference]: Finished difference Result 738 states and 1026 transitions. [2019-11-06 21:25:41,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 21:25:41,273 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2019-11-06 21:25:41,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:41,277 INFO L225 Difference]: With dead ends: 738 [2019-11-06 21:25:41,277 INFO L226 Difference]: Without dead ends: 647 [2019-11-06 21:25:41,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 21:25:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-11-06 21:25:41,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 130. [2019-11-06 21:25:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-06 21:25:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 164 transitions. [2019-11-06 21:25:41,300 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 164 transitions. Word has length 48 [2019-11-06 21:25:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:41,300 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 164 transitions. [2019-11-06 21:25:41,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 21:25:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 164 transitions. [2019-11-06 21:25:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 21:25:41,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:41,302 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:41,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:41,506 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:41,507 INFO L82 PathProgramCache]: Analyzing trace with hash -548204854, now seen corresponding path program 5 times [2019-11-06 21:25:41,507 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:41,507 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321970144] [2019-11-06 21:25:41,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 21:25:41,651 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321970144] [2019-11-06 21:25:41,651 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486613099] [2019-11-06 21:25:41,651 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 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 21:25:41,870 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 21:25:41,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:41,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 21:25:41,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 21:25:41,985 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:41,985 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2019-11-06 21:25:41,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732436029] [2019-11-06 21:25:41,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 21:25:41,986 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:41,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 21:25:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:25:41,991 INFO L87 Difference]: Start difference. First operand 130 states and 164 transitions. Second operand 16 states. [2019-11-06 21:25:44,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:44,945 INFO L93 Difference]: Finished difference Result 945 states and 1308 transitions. [2019-11-06 21:25:44,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-06 21:25:44,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2019-11-06 21:25:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:44,951 INFO L225 Difference]: With dead ends: 945 [2019-11-06 21:25:44,951 INFO L226 Difference]: Without dead ends: 836 [2019-11-06 21:25:44,954 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=2814, Unknown=0, NotChecked=0, Total=3080 [2019-11-06 21:25:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2019-11-06 21:25:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 150. [2019-11-06 21:25:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-06 21:25:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2019-11-06 21:25:44,977 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 53 [2019-11-06 21:25:44,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:44,978 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2019-11-06 21:25:44,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 21:25:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2019-11-06 21:25:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 21:25:44,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:44,979 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:45,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:45,184 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:45,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:45,185 INFO L82 PathProgramCache]: Analyzing trace with hash -791255820, now seen corresponding path program 6 times [2019-11-06 21:25:45,185 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:45,185 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991938925] [2019-11-06 21:25:45,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-06 21:25:45,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991938925] [2019-11-06 21:25:45,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292087612] [2019-11-06 21:25:45,348 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 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 21:25:45,414 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-06 21:25:45,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:45,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 21:25:45,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:45,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:25:45,695 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 21:25:45,698 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:25:45,698 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 17 treesize of output 10 [2019-11-06 21:25:45,699 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:25:45,707 INFO L567 ElimStorePlain]: treesize reduction 5, result has 64.3 percent of original size [2019-11-06 21:25:45,708 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 21:25:45,709 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-11-06 21:25:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-06 21:25:45,731 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:45,731 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2019-11-06 21:25:45,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264994900] [2019-11-06 21:25:45,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 21:25:45,732 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:45,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 21:25:45,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:25:45,733 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand 20 states. [2019-11-06 21:25:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:47,713 INFO L93 Difference]: Finished difference Result 968 states and 1288 transitions. [2019-11-06 21:25:47,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 21:25:47,713 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2019-11-06 21:25:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:47,717 INFO L225 Difference]: With dead ends: 968 [2019-11-06 21:25:47,717 INFO L226 Difference]: Without dead ends: 838 [2019-11-06 21:25:47,718 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 21:25:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2019-11-06 21:25:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 153. [2019-11-06 21:25:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-11-06 21:25:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 193 transitions. [2019-11-06 21:25:47,744 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 193 transitions. Word has length 58 [2019-11-06 21:25:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:47,744 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 193 transitions. [2019-11-06 21:25:47,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 21:25:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 193 transitions. [2019-11-06 21:25:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 21:25:47,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:47,745 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:47,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:47,949 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:47,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1011860072, now seen corresponding path program 1 times [2019-11-06 21:25:47,950 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:47,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297821308] [2019-11-06 21:25:47,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 21:25:48,179 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297821308] [2019-11-06 21:25:48,179 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340452549] [2019-11-06 21:25:48,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:25:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:48,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 21:25:48,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 21:25:48,426 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:48,426 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2019-11-06 21:25:48,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316496861] [2019-11-06 21:25:48,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 21:25:48,429 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:48,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 21:25:48,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2019-11-06 21:25:48,429 INFO L87 Difference]: Start difference. First operand 153 states and 193 transitions. Second operand 19 states. [2019-11-06 21:25:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:53,317 INFO L93 Difference]: Finished difference Result 1275 states and 1759 transitions. [2019-11-06 21:25:53,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-11-06 21:25:53,318 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2019-11-06 21:25:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:53,323 INFO L225 Difference]: With dead ends: 1275 [2019-11-06 21:25:53,323 INFO L226 Difference]: Without dead ends: 1147 [2019-11-06 21:25:53,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=392, Invalid=5770, Unknown=0, NotChecked=0, Total=6162 [2019-11-06 21:25:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2019-11-06 21:25:53,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 173. [2019-11-06 21:25:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-06 21:25:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 219 transitions. [2019-11-06 21:25:53,357 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 219 transitions. Word has length 76 [2019-11-06 21:25:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:53,357 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 219 transitions. [2019-11-06 21:25:53,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 21:25:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 219 transitions. [2019-11-06 21:25:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-06 21:25:53,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:53,359 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:53,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:53,563 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:53,564 INFO L82 PathProgramCache]: Analyzing trace with hash -958458641, now seen corresponding path program 2 times [2019-11-06 21:25:53,564 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:53,564 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781346261] [2019-11-06 21:25:53,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-11-06 21:25:53,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781346261] [2019-11-06 21:25:53,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308309360] [2019-11-06 21:25:53,733 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 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 21:25:53,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:53,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:53,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 21:25:53,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 2 proven. 139 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 21:25:53,946 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:53,946 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 18 [2019-11-06 21:25:53,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346775036] [2019-11-06 21:25:53,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 21:25:53,947 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:53,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 21:25:53,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:25:53,948 INFO L87 Difference]: Start difference. First operand 173 states and 219 transitions. Second operand 18 states. [2019-11-06 21:25:57,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:57,767 INFO L93 Difference]: Finished difference Result 1056 states and 1447 transitions. [2019-11-06 21:25:57,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-11-06 21:25:57,767 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2019-11-06 21:25:57,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:57,772 INFO L225 Difference]: With dead ends: 1056 [2019-11-06 21:25:57,772 INFO L226 Difference]: Without dead ends: 957 [2019-11-06 21:25:57,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=4137, Unknown=0, NotChecked=0, Total=4422 [2019-11-06 21:25:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2019-11-06 21:25:57,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 191. [2019-11-06 21:25:57,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-11-06 21:25:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 243 transitions. [2019-11-06 21:25:57,808 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 243 transitions. Word has length 84 [2019-11-06 21:25:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:57,809 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 243 transitions. [2019-11-06 21:25:57,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 21:25:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 243 transitions. [2019-11-06 21:25:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 21:25:57,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:57,810 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:58,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:58,014 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:58,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1787205274, now seen corresponding path program 3 times [2019-11-06 21:25:58,015 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:58,015 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208940927] [2019-11-06 21:25:58,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-11-06 21:25:58,191 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208940927] [2019-11-06 21:25:58,191 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581421709] [2019-11-06 21:25:58,192 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 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 21:25:58,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 21:25:58,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:58,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-06 21:25:58,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 21:25:59,195 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:59,196 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20] total 29 [2019-11-06 21:25:59,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699931540] [2019-11-06 21:25:59,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-06 21:25:59,197 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:59,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-06 21:25:59,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2019-11-06 21:25:59,197 INFO L87 Difference]: Start difference. First operand 191 states and 243 transitions. Second operand 29 states. [2019-11-06 21:26:10,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:10,137 INFO L93 Difference]: Finished difference Result 1159 states and 1580 transitions. [2019-11-06 21:26:10,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2019-11-06 21:26:10,138 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 90 [2019-11-06 21:26:10,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:10,142 INFO L225 Difference]: With dead ends: 1159 [2019-11-06 21:26:10,143 INFO L226 Difference]: Without dead ends: 1045 [2019-11-06 21:26:10,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8729 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1000, Invalid=24122, Unknown=0, NotChecked=0, Total=25122 [2019-11-06 21:26:10,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2019-11-06 21:26:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 677. [2019-11-06 21:26:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2019-11-06 21:26:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 904 transitions. [2019-11-06 21:26:10,249 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 904 transitions. Word has length 90 [2019-11-06 21:26:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:10,249 INFO L462 AbstractCegarLoop]: Abstraction has 677 states and 904 transitions. [2019-11-06 21:26:10,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-06 21:26:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 904 transitions. [2019-11-06 21:26:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-06 21:26:10,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:10,251 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:10,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:10,452 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:10,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1283842895, now seen corresponding path program 4 times [2019-11-06 21:26:10,453 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:10,454 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792270249] [2019-11-06 21:26:10,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-06 21:26:10,641 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792270249] [2019-11-06 21:26:10,642 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669813469] [2019-11-06 21:26:10,642 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 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 21:26:10,773 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:26:10,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:10,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-06 21:26:10,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 190 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-06 21:26:10,968 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:26:10,968 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 22 [2019-11-06 21:26:10,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092554266] [2019-11-06 21:26:10,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 21:26:10,969 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:10,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 21:26:10,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2019-11-06 21:26:10,969 INFO L87 Difference]: Start difference. First operand 677 states and 904 transitions. Second operand 22 states.