/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:08:51,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:08:51,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:08:51,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 22:08:51,907 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 [2019-11-23 22:08:51,927 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:08:51,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:08:51,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:08:51,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:08:51,930 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:08:51,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:08:51,930 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:08:51,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:08:51,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:08:51,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:08:51,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:08:51,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:08:51,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:08:51,933 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:08:51,933 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:08:51,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:08:51,933 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:08:51,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:08:51,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:08:51,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:08:51,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:08:51,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:08:51,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:08:51,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:08:51,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:08:51,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:08:51,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:08:51,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:08:51,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:08:51,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:08:52,201 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:08:52,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:08:52,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:08:52,221 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:08:52,221 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:08:52,222 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2019-11-23 22:08:52,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9c6df64/2e909019bb8545d897c9662a3c4a3437/FLAGe3a46709b [2019-11-23 22:08:52,733 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:08:52,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2019-11-23 22:08:52,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9c6df64/2e909019bb8545d897c9662a3c4a3437/FLAGe3a46709b [2019-11-23 22:08:53,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9c6df64/2e909019bb8545d897c9662a3c4a3437 [2019-11-23 22:08:53,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:08:53,097 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:08:53,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:08:53,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:08:53,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:08:53,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f501c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53, skipping insertion in model container [2019-11-23 22:08:53,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:08:53,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:08:53,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:08:53,334 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:08:53,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:08:53,370 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:08:53,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53 WrapperNode [2019-11-23 22:08:53,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:08:53,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:08:53,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:08:53,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:08:53,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:08:53,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:08:53,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:08:53,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:08:53,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:08:53,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:08:53,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:08:53,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:08:53,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (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 [2019-11-23 22:08:53,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:08:53,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:08:53,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:08:53,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:08:53,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:08:53,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:08:53,788 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:08:53,788 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 22:08:53,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:08:53 BoogieIcfgContainer [2019-11-23 22:08:53,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:08:53,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:08:53,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:08:53,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:08:53,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:08:53" (1/3) ... [2019-11-23 22:08:53,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a420589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:08:53, skipping insertion in model container [2019-11-23 22:08:53,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (2/3) ... [2019-11-23 22:08:53,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a420589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:08:53, skipping insertion in model container [2019-11-23 22:08:53,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:08:53" (3/3) ... [2019-11-23 22:08:53,810 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2019-11-23 22:08:53,832 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:08:53,839 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:08:53,857 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:08:53,876 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:08:53,877 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:08:53,877 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:08:53,877 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:08:53,877 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:08:53,877 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:08:53,877 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:08:53,877 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:08:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 22:08:53,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:08:53,894 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:53,895 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:53,895 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:53,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2019-11-23 22:08:53,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:53,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279023522] [2019-11-23 22:08:53,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:54,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279023522] [2019-11-23 22:08:54,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:08:54,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:08:54,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377106266] [2019-11-23 22:08:54,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:08:54,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:54,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:08:54,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:08:54,091 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-11-23 22:08:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:54,152 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2019-11-23 22:08:54,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:08:54,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 22:08:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:54,162 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:08:54,162 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:08:54,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:08:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:08:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2019-11-23 22:08:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:08:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 22:08:54,200 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2019-11-23 22:08:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:54,201 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 22:08:54,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:08:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 22:08:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:08:54,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:54,203 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:54,204 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2019-11-23 22:08:54,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:54,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280668977] [2019-11-23 22:08:54,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:54,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280668977] [2019-11-23 22:08:54,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433136356] [2019-11-23 22:08:54,312 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 [2019-11-23 22:08:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:54,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:08:54,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:54,424 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-23 22:08:54,425 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:54,436 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:08:54,438 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:08:54,438 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2019-11-23 22:08:54,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:54,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:54,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2019-11-23 22:08:54,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131157987] [2019-11-23 22:08:54,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:08:54,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:54,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:08:54,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:08:54,495 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 7 states. [2019-11-23 22:08:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:54,633 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2019-11-23 22:08:54,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:08:54,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-23 22:08:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:54,635 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:08:54,636 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:08:54,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:08:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:08:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2019-11-23 22:08:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:08:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-23 22:08:54,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2019-11-23 22:08:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:54,643 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-23 22:08:54,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:08:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-23 22:08:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:08:54,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:54,644 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:54,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:54,850 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:54,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:54,851 INFO L82 PathProgramCache]: Analyzing trace with hash -444266143, now seen corresponding path program 1 times [2019-11-23 22:08:54,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:54,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853816622] [2019-11-23 22:08:54,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:08:55,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853816622] [2019-11-23 22:08:55,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331995336] [2019-11-23 22:08:55,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:55,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:08:55,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:55,095 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2019-11-23 22:08:55,096 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:55,144 INFO L567 ElimStorePlain]: treesize reduction 54, result has 33.3 percent of original size [2019-11-23 22:08:55,144 INFO L464 ElimStorePlain]: Eliminatee v_prenex_1 vanished before elimination [2019-11-23 22:08:55,145 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:08:55,146 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:85, output treesize:24 [2019-11-23 22:08:55,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:55,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:55,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 9 [2019-11-23 22:08:55,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923814299] [2019-11-23 22:08:55,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:08:55,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:55,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:08:55,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:08:55,277 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 9 states. [2019-11-23 22:08:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:55,534 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2019-11-23 22:08:55,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:08:55,534 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-11-23 22:08:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:55,536 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:08:55,536 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:08:55,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:08:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:08:55,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2019-11-23 22:08:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:08:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-23 22:08:55,551 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2019-11-23 22:08:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:55,552 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-23 22:08:55,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:08:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-23 22:08:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 22:08:55,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:55,555 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:55,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:55,759 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1285529589, now seen corresponding path program 2 times [2019-11-23 22:08:55,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:55,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956383146] [2019-11-23 22:08:55,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:08:55,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956383146] [2019-11-23 22:08:55,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425429035] [2019-11-23 22:08:55,941 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 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 [2019-11-23 22:08:55,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:08:55,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:55,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:08:55,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:56,025 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:08:56,025 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:56,054 INFO L567 ElimStorePlain]: treesize reduction 10, result has 75.6 percent of original size [2019-11-23 22:08:56,059 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-11-23 22:08:56,060 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:56,075 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:08:56,077 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:08:56,077 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:85, output treesize:24 [2019-11-23 22:08:56,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:56,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:56,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2019-11-23 22:08:56,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971005133] [2019-11-23 22:08:56,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:08:56,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:56,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:08:56,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:08:56,218 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2019-11-23 22:08:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:56,501 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2019-11-23 22:08:56,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:08:56,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-23 22:08:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:56,504 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:08:56,504 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:08:56,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:08:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:08:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-11-23 22:08:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:08:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-23 22:08:56,514 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2019-11-23 22:08:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:56,514 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-23 22:08:56,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:08:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-23 22:08:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:08:56,515 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:56,515 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:56,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:56,725 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1329625591, now seen corresponding path program 3 times [2019-11-23 22:08:56,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:56,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877667979] [2019-11-23 22:08:56,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 22:08:56,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877667979] [2019-11-23 22:08:56,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337124403] [2019-11-23 22:08:56,886 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 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 [2019-11-23 22:08:57,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 22:08:57,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:57,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:08:57,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:57,195 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2019-11-23 22:08:57,196 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:57,233 INFO L567 ElimStorePlain]: treesize reduction 54, result has 33.3 percent of original size [2019-11-23 22:08:57,233 INFO L464 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2019-11-23 22:08:57,236 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:08:57,236 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:85, output treesize:24 [2019-11-23 22:08:57,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:57,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:57,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 13 [2019-11-23 22:08:57,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180602644] [2019-11-23 22:08:57,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:08:57,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:57,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:08:57,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:08:57,427 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 13 states. [2019-11-23 22:08:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:57,706 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2019-11-23 22:08:57,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:08:57,707 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2019-11-23 22:08:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:57,708 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:08:57,708 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:08:57,709 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:08:57,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:08:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2019-11-23 22:08:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:08:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-23 22:08:57,717 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2019-11-23 22:08:57,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:57,718 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-23 22:08:57,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:08:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-23 22:08:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:08:57,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:57,719 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:57,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:57,924 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:57,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1075829661, now seen corresponding path program 4 times [2019-11-23 22:08:57,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:57,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758253292] [2019-11-23 22:08:57,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 22:08:58,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758253292] [2019-11-23 22:08:58,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790931065] [2019-11-23 22:08:58,072 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 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 [2019-11-23 22:08:58,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:08:58,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:58,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 22:08:58,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:58,166 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2019-11-23 22:08:58,166 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:58,199 INFO L567 ElimStorePlain]: treesize reduction 54, result has 33.3 percent of original size [2019-11-23 22:08:58,200 INFO L464 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2019-11-23 22:08:58,201 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:08:58,201 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:85, output treesize:24 [2019-11-23 22:08:58,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:58,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:58,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 15 [2019-11-23 22:08:58,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347532737] [2019-11-23 22:08:58,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:08:58,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:58,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:08:58,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:08:58,389 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2019-11-23 22:08:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:58,770 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2019-11-23 22:08:58,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:08:58,770 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-11-23 22:08:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:58,771 INFO L225 Difference]: With dead ends: 70 [2019-11-23 22:08:58,771 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 22:08:58,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:08:58,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 22:08:58,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2019-11-23 22:08:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 22:08:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-23 22:08:58,783 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 33 [2019-11-23 22:08:58,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:58,783 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-23 22:08:58,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:08:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-23 22:08:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 22:08:58,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:58,785 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:58,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:58,992 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1069793457, now seen corresponding path program 5 times [2019-11-23 22:08:58,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:58,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840818137] [2019-11-23 22:08:58,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 22:08:59,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840818137] [2019-11-23 22:08:59,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974117241] [2019-11-23 22:08:59,188 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 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