/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:46:01,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:46:01,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:46:01,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:46:01,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:46:01,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:46:01,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:46:01,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:46:01,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:46:01,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:46:01,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:46:01,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:46:01,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:46:01,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:46:01,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:46:01,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:46:01,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:46:01,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:46:01,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:46:01,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:46:01,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:46:01,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:46:01,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:46:01,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:46:01,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:46:01,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:46:01,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:46:01,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:46:01,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:46:01,945 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:46:01,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:46:01,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:46:01,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:46:01,948 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:46:01,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:46:01,948 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:46:01,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:46:01,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:46:01,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:46:01,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:46:01,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:46:01,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:46:01,951 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:46:01,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:46:01,951 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:46:01,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:46:01,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:46:01,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:46:01,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:46:01,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:46:01,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:46:01,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:46:01,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:46:01,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:46:01,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:46:01,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:46:01,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:46:01,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:46:02,212 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:46:02,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:46:02,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:46:02,229 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:46:02,230 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:46:02,230 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2019-11-06 18:46:02,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2474a453f/0f9e30d6185246748cc1c2d53f019225/FLAG0a8bda157 [2019-11-06 18:46:02,760 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:46:02,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2019-11-06 18:46:02,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2474a453f/0f9e30d6185246748cc1c2d53f019225/FLAG0a8bda157 [2019-11-06 18:46:03,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2474a453f/0f9e30d6185246748cc1c2d53f019225 [2019-11-06 18:46:03,121 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:46:03,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:46:03,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:46:03,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:46:03,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:46:03,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:46:03" (1/1) ... [2019-11-06 18:46:03,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abfb195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:03, skipping insertion in model container [2019-11-06 18:46:03,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:46:03" (1/1) ... [2019-11-06 18:46:03,139 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:46:03,165 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:46:03,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:46:03,352 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:46:03,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:46:03,399 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:46:03,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:03 WrapperNode [2019-11-06 18:46:03,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:46:03,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:46:03,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:46:03,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:46:03,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:03" (1/1) ... [2019-11-06 18:46:03,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:03" (1/1) ... [2019-11-06 18:46:03,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:03" (1/1) ... [2019-11-06 18:46:03,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:03" (1/1) ... [2019-11-06 18:46:03,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:03" (1/1) ... [2019-11-06 18:46:03,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:03" (1/1) ... [2019-11-06 18:46:03,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:03" (1/1) ... [2019-11-06 18:46:03,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:46:03,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:46:03,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:46:03,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:46:03,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:46:03,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:46:03,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:46:03,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:46:03,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:46:03,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:46:03,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:46:03,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:46:03,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:46:03,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:46:03,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:46:03,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:46:03,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:46:03,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:46:03,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:46:03,898 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:46:03,899 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 18:46:03,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:46:03 BoogieIcfgContainer [2019-11-06 18:46:03,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:46:03,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:46:03,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:46:03,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:46:03,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:46:03" (1/3) ... [2019-11-06 18:46:03,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a26588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:46:03, skipping insertion in model container [2019-11-06 18:46:03,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:03" (2/3) ... [2019-11-06 18:46:03,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a26588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:46:03, skipping insertion in model container [2019-11-06 18:46:03,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:46:03" (3/3) ... [2019-11-06 18:46:03,908 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2019-11-06 18:46:03,920 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:46:03,934 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:46:03,945 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:46:03,968 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:46:03,969 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:46:03,969 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:46:03,969 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:46:03,969 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:46:03,969 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:46:03,969 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:46:03,969 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:46:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:46:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:46:03,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:03,992 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:03,994 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:04,000 INFO L82 PathProgramCache]: Analyzing trace with hash -640162803, now seen corresponding path program 1 times [2019-11-06 18:46:04,006 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:04,007 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740023045] [2019-11-06 18:46:04,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:46:04,175 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740023045] [2019-11-06 18:46:04,176 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:46:04,176 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:46:04,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201710755] [2019-11-06 18:46:04,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:46:04,183 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:04,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:46:04,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:46:04,201 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:46:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:04,335 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2019-11-06 18:46:04,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:46:04,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:46:04,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:04,346 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:46:04,346 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:46:04,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:46:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:46:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:46:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:46:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-06 18:46:04,389 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-11-06 18:46:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:04,390 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-06 18:46:04,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:46:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-06 18:46:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:46:04,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:04,392 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:04,392 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:04,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:04,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2068442237, now seen corresponding path program 1 times [2019-11-06 18:46:04,393 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:04,394 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857706010] [2019-11-06 18:46:04,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:46:04,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857706010] [2019-11-06 18:46:04,466 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:46:04,466 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:46:04,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552501445] [2019-11-06 18:46:04,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:46:04,468 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:04,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:46:04,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:46:04,469 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-11-06 18:46:04,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:04,574 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 18:46:04,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:46:04,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:46:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:04,576 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:46:04,576 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:46:04,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:46:04,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:46:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 18:46:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:46:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-06 18:46:04,585 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-11-06 18:46:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:04,586 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-06 18:46:04,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:46:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-06 18:46:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:46:04,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:04,587 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:04,588 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1850093537, now seen corresponding path program 1 times [2019-11-06 18:46:04,588 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:04,589 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075509989] [2019-11-06 18:46:04,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:46:04,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075509989] [2019-11-06 18:46:04,653 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:46:04,653 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:46:04,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926542597] [2019-11-06 18:46:04,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:46:04,654 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:04,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:46:04,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:46:04,655 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-11-06 18:46:04,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:04,766 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-11-06 18:46:04,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:46:04,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-06 18:46:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:04,768 INFO L225 Difference]: With dead ends: 48 [2019-11-06 18:46:04,768 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 18:46:04,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:46:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 18:46:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-11-06 18:46:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:46:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-06 18:46:04,775 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2019-11-06 18:46:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:04,776 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-06 18:46:04,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:46:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-06 18:46:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:46:04,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:04,777 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] [2019-11-06 18:46:04,778 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:04,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:04,778 INFO L82 PathProgramCache]: Analyzing trace with hash -45207547, now seen corresponding path program 1 times [2019-11-06 18:46:04,778 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:04,779 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844943512] [2019-11-06 18:46:04,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:04,888 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 18:46:04,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844943512] [2019-11-06 18:46:04,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091395896] [2019-11-06 18:46:04,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:04,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:46:04,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:05,009 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 18:46:05,010 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:05,010 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:46:05,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736281915] [2019-11-06 18:46:05,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:46:05,011 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:05,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:46:05,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:46:05,012 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2019-11-06 18:46:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:05,182 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-11-06 18:46:05,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:46:05,183 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-11-06 18:46:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:05,184 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:46:05,184 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:46:05,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:46:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:46:05,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2019-11-06 18:46:05,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 18:46:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-11-06 18:46:05,198 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 24 [2019-11-06 18:46:05,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:05,198 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-11-06 18:46:05,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:46:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-11-06 18:46:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:46:05,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:05,200 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:05,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:05,406 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:05,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:05,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1499586431, now seen corresponding path program 2 times [2019-11-06 18:46:05,406 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:05,406 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989920619] [2019-11-06 18:46:05,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:46:05,535 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989920619] [2019-11-06 18:46:05,535 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570327649] [2019-11-06 18:46:05,535 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:05,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:46:05,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:05,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:46:05,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:46:05,612 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:05,612 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:46:05,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208372498] [2019-11-06 18:46:05,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:46:05,613 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:05,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:46:05,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:46:05,614 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 7 states. [2019-11-06 18:46:05,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:05,679 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2019-11-06 18:46:05,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:46:05,680 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2019-11-06 18:46:05,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:05,681 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:46:05,681 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:46:05,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:46:05,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:46:05,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-06 18:46:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:46:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-11-06 18:46:05,694 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 32 [2019-11-06 18:46:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:05,694 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-11-06 18:46:05,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:46:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-11-06 18:46:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:46:05,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:05,696 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:05,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:05,899 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:05,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1436123101, now seen corresponding path program 3 times [2019-11-06 18:46:05,900 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:05,900 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593555207] [2019-11-06 18:46:05,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:46:05,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593555207] [2019-11-06 18:46:05,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758699960] [2019-11-06 18:46:05,987 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:06,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:46:06,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:06,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:46:06,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:46:06,099 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:06,099 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-06 18:46:06,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938062880] [2019-11-06 18:46:06,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:46:06,100 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:06,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:46:06,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:46:06,101 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 10 states. [2019-11-06 18:46:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:06,335 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-11-06 18:46:06,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:46:06,336 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-06 18:46:06,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:06,338 INFO L225 Difference]: With dead ends: 78 [2019-11-06 18:46:06,338 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:46:06,339 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:46:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:46:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2019-11-06 18:46:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:46:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-11-06 18:46:06,355 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 34 [2019-11-06 18:46:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:06,355 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-11-06 18:46:06,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:46:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-11-06 18:46:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:46:06,358 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:06,358 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:06,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:06,567 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:06,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:06,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1447438805, now seen corresponding path program 4 times [2019-11-06 18:46:06,569 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:06,569 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682916346] [2019-11-06 18:46:06,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:46:06,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682916346] [2019-11-06 18:46:06,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494458648] [2019-11-06 18:46:06,766 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:06,831 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:46:06,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:06,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:46:06,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:46:06,867 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:06,867 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:46:06,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842329642] [2019-11-06 18:46:06,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:46:06,872 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:06,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:46:06,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:46:06,874 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 9 states. [2019-11-06 18:46:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:06,984 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2019-11-06 18:46:06,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:46:06,985 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2019-11-06 18:46:06,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:06,986 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:46:06,986 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 18:46:06,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:46:06,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 18:46:06,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-06 18:46:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:46:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2019-11-06 18:46:06,993 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 42 [2019-11-06 18:46:06,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:06,994 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2019-11-06 18:46:06,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:46:06,994 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2019-11-06 18:46:06,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 18:46:06,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:06,995 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:07,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:07,200 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:07,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1433365683, now seen corresponding path program 5 times [2019-11-06 18:46:07,201 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:07,201 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46071954] [2019-11-06 18:46:07,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:46:07,297 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46071954] [2019-11-06 18:46:07,297 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997436722] [2019-11-06 18:46:07,297 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:07,415 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:46:07,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:07,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:46:07,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 18:46:07,475 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:07,476 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-06 18:46:07,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347251258] [2019-11-06 18:46:07,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:46:07,477 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:07,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:46:07,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:46:07,477 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 13 states. [2019-11-06 18:46:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:07,702 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2019-11-06 18:46:07,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:46:07,702 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-11-06 18:46:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:07,704 INFO L225 Difference]: With dead ends: 94 [2019-11-06 18:46:07,704 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 18:46:07,706 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:46:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 18:46:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2019-11-06 18:46:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:46:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2019-11-06 18:46:07,713 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 44 [2019-11-06 18:46:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:07,713 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2019-11-06 18:46:07,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:46:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2019-11-06 18:46:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:46:07,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:07,715 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:07,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:07,928 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash 589786441, now seen corresponding path program 6 times [2019-11-06 18:46:07,929 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:07,929 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441098749] [2019-11-06 18:46:07,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-06 18:46:08,047 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441098749] [2019-11-06 18:46:08,047 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696427659] [2019-11-06 18:46:08,047 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:08,114 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-06 18:46:08,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:08,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:46:08,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:08,160 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2019-11-06 18:46:08,161 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:08,163 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:08,164 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:08,166 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-11-06 18:46:08,233 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2019-11-06 18:46:08,234 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:08,251 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:08,253 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-06 18:46:08,253 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:38 [2019-11-06 18:46:08,497 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:08,498 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2019-11-06 18:46:08,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:08,502 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-06 18:46:08,515 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:08,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:08,518 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:08,519 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:55, output treesize:14 [2019-11-06 18:46:08,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:46:08,620 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:08,621 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-11-06 18:46:08,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653156519] [2019-11-06 18:46:08,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:46:08,622 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:08,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:46:08,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:46:08,622 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 18 states. [2019-11-06 18:46:11,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:11,801 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2019-11-06 18:46:11,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 18:46:11,806 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2019-11-06 18:46:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:11,810 INFO L225 Difference]: With dead ends: 137 [2019-11-06 18:46:11,810 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 18:46:11,811 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=1126, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:46:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 18:46:11,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 75. [2019-11-06 18:46:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 18:46:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2019-11-06 18:46:11,827 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 52 [2019-11-06 18:46:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:11,827 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2019-11-06 18:46:11,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:46:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2019-11-06 18:46:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 18:46:11,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:11,829 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:12,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:12,041 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:12,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1465812461, now seen corresponding path program 1 times [2019-11-06 18:46:12,042 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:12,042 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865764435] [2019-11-06 18:46:12,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-06 18:46:12,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865764435] [2019-11-06 18:46:12,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083211680] [2019-11-06 18:46:12,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:12,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:46:12,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-06 18:46:12,303 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:12,303 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:46:12,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379876583] [2019-11-06 18:46:12,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:46:12,304 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:12,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:46:12,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:46:12,305 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 12 states. [2019-11-06 18:46:12,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:12,408 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2019-11-06 18:46:12,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:46:12,408 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2019-11-06 18:46:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:12,410 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:46:12,410 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 18:46:12,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:46:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 18:46:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-06 18:46:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:46:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2019-11-06 18:46:12,420 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 54 [2019-11-06 18:46:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:12,421 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2019-11-06 18:46:12,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:46:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2019-11-06 18:46:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:46:12,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:12,422 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:12,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:12,634 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:12,635 INFO L82 PathProgramCache]: Analyzing trace with hash 812163087, now seen corresponding path program 2 times [2019-11-06 18:46:12,635 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:12,635 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138424212] [2019-11-06 18:46:12,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-06 18:46:12,768 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138424212] [2019-11-06 18:46:12,769 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162216968] [2019-11-06 18:46:12,769 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:12,824 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:46:12,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:12,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:46:12,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-06 18:46:12,845 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:12,845 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:46:12,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949791805] [2019-11-06 18:46:12,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:46:12,846 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:12,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:46:12,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:46:12,847 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 13 states. [2019-11-06 18:46:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:12,920 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2019-11-06 18:46:12,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:46:12,921 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-11-06 18:46:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:12,923 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:46:12,923 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:46:12,924 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:46:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:46:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 18:46:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:46:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2019-11-06 18:46:12,933 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 56 [2019-11-06 18:46:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:12,933 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2019-11-06 18:46:12,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:46:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2019-11-06 18:46:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:46:12,935 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:12,935 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:13,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:13,139 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash -279660111, now seen corresponding path program 3 times [2019-11-06 18:46:13,139 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:13,140 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076538601] [2019-11-06 18:46:13,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-06 18:46:13,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076538601] [2019-11-06 18:46:13,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543867555] [2019-11-06 18:46:13,290 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:13,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:46:13,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:13,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:46:13,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:13,376 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2019-11-06 18:46:13,377 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:13,379 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:13,379 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:13,379 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-11-06 18:46:13,428 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2019-11-06 18:46:13,429 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:13,442 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:13,443 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:46:13,443 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-11-06 18:46:13,585 INFO L341 Elim1Store]: treesize reduction 17, result has 73.8 percent of original size [2019-11-06 18:46:13,585 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 88 [2019-11-06 18:46:13,587 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:13,627 INFO L567 ElimStorePlain]: treesize reduction 32, result has 68.9 percent of original size [2019-11-06 18:46:13,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:13,630 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-06 18:46:13,631 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:71 [2019-11-06 18:46:13,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:13,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:15,922 INFO L341 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-11-06 18:46:15,923 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 43 [2019-11-06 18:46:15,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:15,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:15,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:15,926 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2019-11-06 18:46:15,957 INFO L567 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-11-06 18:46:15,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:15,958 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-06 18:46:15,959 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2019-11-06 18:46:15,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 18:46:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 18:46:16,113 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:16,113 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2019-11-06 18:46:16,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772849948] [2019-11-06 18:46:16,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 18:46:16,114 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:16,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 18:46:16,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=545, Unknown=1, NotChecked=0, Total=650 [2019-11-06 18:46:16,115 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 26 states. [2019-11-06 18:46:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:20,392 INFO L93 Difference]: Finished difference Result 189 states and 238 transitions. [2019-11-06 18:46:20,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-06 18:46:20,393 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2019-11-06 18:46:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:20,395 INFO L225 Difference]: With dead ends: 189 [2019-11-06 18:46:20,395 INFO L226 Difference]: Without dead ends: 135 [2019-11-06 18:46:20,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=626, Invalid=3533, Unknown=1, NotChecked=0, Total=4160 [2019-11-06 18:46:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-06 18:46:20,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2019-11-06 18:46:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-06 18:46:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2019-11-06 18:46:20,409 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 58 [2019-11-06 18:46:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:20,409 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2019-11-06 18:46:20,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 18:46:20,409 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2019-11-06 18:46:20,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 18:46:20,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:20,411 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:20,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:20,615 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:20,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1291567727, now seen corresponding path program 4 times [2019-11-06 18:46:20,616 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:20,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378863814] [2019-11-06 18:46:20,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-06 18:46:20,737 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378863814] [2019-11-06 18:46:20,737 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73257947] [2019-11-06 18:46:20,737 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:20,821 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:46:20,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:20,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:46:20,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-06 18:46:20,855 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:20,856 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:46:20,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826869587] [2019-11-06 18:46:20,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:46:20,856 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:20,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:46:20,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:46:20,857 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 15 states. [2019-11-06 18:46:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:20,984 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2019-11-06 18:46:20,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:46:20,985 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2019-11-06 18:46:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:20,986 INFO L225 Difference]: With dead ends: 176 [2019-11-06 18:46:20,986 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 18:46:20,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:46:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 18:46:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2019-11-06 18:46:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-06 18:46:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2019-11-06 18:46:20,997 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 60 [2019-11-06 18:46:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:20,997 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2019-11-06 18:46:20,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:46:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2019-11-06 18:46:20,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 18:46:20,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:20,999 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:21,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:21,212 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:21,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2061060557, now seen corresponding path program 5 times [2019-11-06 18:46:21,213 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:21,213 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601852909] [2019-11-06 18:46:21,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-06 18:46:21,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601852909] [2019-11-06 18:46:21,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030662963] [2019-11-06 18:46:21,355 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:21,841 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:46:21,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:21,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:46:21,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2019-11-06 18:46:21,932 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:21,932 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-06 18:46:21,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181617887] [2019-11-06 18:46:21,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:46:21,933 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:21,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:46:21,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:46:21,935 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 20 states. [2019-11-06 18:46:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:22,320 INFO L93 Difference]: Finished difference Result 226 states and 293 transitions. [2019-11-06 18:46:22,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:46:22,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2019-11-06 18:46:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:22,324 INFO L225 Difference]: With dead ends: 226 [2019-11-06 18:46:22,324 INFO L226 Difference]: Without dead ends: 153 [2019-11-06 18:46:22,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=341, Invalid=651, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:46:22,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-06 18:46:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2019-11-06 18:46:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-06 18:46:22,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 144 transitions. [2019-11-06 18:46:22,335 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 144 transitions. Word has length 62 [2019-11-06 18:46:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:22,335 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 144 transitions. [2019-11-06 18:46:22,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:46:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 144 transitions. [2019-11-06 18:46:22,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-06 18:46:22,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:22,337 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:22,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:22,542 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:22,543 INFO L82 PathProgramCache]: Analyzing trace with hash 304329915, now seen corresponding path program 6 times [2019-11-06 18:46:22,543 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:22,543 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345892355] [2019-11-06 18:46:22,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 18:46:22,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345892355] [2019-11-06 18:46:22,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458901973] [2019-11-06 18:46:22,691 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:22,883 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-06 18:46:22,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:22,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:46:22,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2019-11-06 18:46:23,007 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:23,008 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2019-11-06 18:46:23,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28384525] [2019-11-06 18:46:23,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:46:23,008 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:23,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:46:23,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:46:23,009 INFO L87 Difference]: Start difference. First operand 116 states and 144 transitions. Second operand 22 states. [2019-11-06 18:46:23,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:23,448 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2019-11-06 18:46:23,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:46:23,449 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2019-11-06 18:46:23,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:23,451 INFO L225 Difference]: With dead ends: 252 [2019-11-06 18:46:23,451 INFO L226 Difference]: Without dead ends: 167 [2019-11-06 18:46:23,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=783, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:46:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-06 18:46:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 130. [2019-11-06 18:46:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-06 18:46:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2019-11-06 18:46:23,463 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 70 [2019-11-06 18:46:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:23,464 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2019-11-06 18:46:23,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:46:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2019-11-06 18:46:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:46:23,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:23,465 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:23,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:23,669 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:23,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:23,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1426838071, now seen corresponding path program 7 times [2019-11-06 18:46:23,670 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:23,670 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191324825] [2019-11-06 18:46:23,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 18:46:23,843 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191324825] [2019-11-06 18:46:23,843 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251137900] [2019-11-06 18:46:23,843 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:23,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:46:23,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 18:46:23,946 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:23,946 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:46:23,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252269561] [2019-11-06 18:46:23,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:46:23,947 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:23,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:46:23,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:46:23,948 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand 18 states. [2019-11-06 18:46:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:24,108 INFO L93 Difference]: Finished difference Result 230 states and 294 transitions. [2019-11-06 18:46:24,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:46:24,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2019-11-06 18:46:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:24,110 INFO L225 Difference]: With dead ends: 230 [2019-11-06 18:46:24,110 INFO L226 Difference]: Without dead ends: 133 [2019-11-06 18:46:24,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:46:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-06 18:46:24,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-11-06 18:46:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-06 18:46:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2019-11-06 18:46:24,125 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 78 [2019-11-06 18:46:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:24,125 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2019-11-06 18:46:24,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:46:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2019-11-06 18:46:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-06 18:46:24,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:24,127 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:24,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:24,330 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:24,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1504565671, now seen corresponding path program 8 times [2019-11-06 18:46:24,331 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:24,331 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022887375] [2019-11-06 18:46:24,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 18:46:24,540 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022887375] [2019-11-06 18:46:24,541 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502413705] [2019-11-06 18:46:24,541 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:24,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:46:24,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:24,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:46:24,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 18:46:24,645 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:24,645 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:46:24,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993627795] [2019-11-06 18:46:24,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:46:24,646 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:24,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:46:24,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:46:24,647 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand 19 states. [2019-11-06 18:46:24,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:24,750 INFO L93 Difference]: Finished difference Result 232 states and 296 transitions. [2019-11-06 18:46:24,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:46:24,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2019-11-06 18:46:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:24,753 INFO L225 Difference]: With dead ends: 232 [2019-11-06 18:46:24,753 INFO L226 Difference]: Without dead ends: 135 [2019-11-06 18:46:24,754 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:46:24,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-06 18:46:24,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2019-11-06 18:46:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-06 18:46:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2019-11-06 18:46:24,763 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 80 [2019-11-06 18:46:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:24,764 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2019-11-06 18:46:24,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:46:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2019-11-06 18:46:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:46:24,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:24,765 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:24,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:24,968 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1085015557, now seen corresponding path program 9 times [2019-11-06 18:46:24,969 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:24,970 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006049200] [2019-11-06 18:46:24,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 18:46:25,168 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006049200] [2019-11-06 18:46:25,169 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231080809] [2019-11-06 18:46:25,169 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:25,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:46:25,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:25,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 18:46:25,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:25,374 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2019-11-06 18:46:25,374 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:25,376 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:25,376 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:25,377 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-11-06 18:46:25,419 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2019-11-06 18:46:25,419 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:25,425 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:25,425 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:46:25,425 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-11-06 18:46:25,509 INFO L341 Elim1Store]: treesize reduction 17, result has 73.8 percent of original size [2019-11-06 18:46:25,509 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 88 [2019-11-06 18:46:25,510 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:25,540 INFO L567 ElimStorePlain]: treesize reduction 32, result has 68.0 percent of original size [2019-11-06 18:46:25,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:25,542 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-06 18:46:25,542 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:68 [2019-11-06 18:46:25,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:25,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:25,738 INFO L341 Elim1Store]: treesize reduction 52, result has 48.0 percent of original size [2019-11-06 18:46:25,738 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 100 [2019-11-06 18:46:25,743 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:25,781 INFO L567 ElimStorePlain]: treesize reduction 32, result has 68.9 percent of original size [2019-11-06 18:46:25,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:25,783 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-06 18:46:25,784 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:63, output treesize:71 [2019-11-06 18:46:25,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:25,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:27,939 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 43 [2019-11-06 18:46:27,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:28,075 INFO L341 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-11-06 18:46:28,076 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 43 [2019-11-06 18:46:28,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:28,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:28,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:28,080 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2019-11-06 18:46:28,105 INFO L567 ElimStorePlain]: treesize reduction 16, result has 63.6 percent of original size [2019-11-06 18:46:28,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:28,107 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-06 18:46:28,108 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2019-11-06 18:46:28,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 18:46:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-06 18:46:28,327 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:28,327 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2019-11-06 18:46:28,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696060061] [2019-11-06 18:46:28,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:46:28,328 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:46:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:46:28,328 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand 35 states. [2019-11-06 18:46:33,060 WARN L191 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2019-11-06 18:46:33,550 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-11-06 18:46:34,562 WARN L191 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2019-11-06 18:46:41,755 WARN L191 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-11-06 18:46:47,893 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2019-11-06 18:46:50,292 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59