/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:39:31,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:39:31,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:39:31,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:39:31,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:39:31,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:39:31,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:39:31,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:39:31,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:39:31,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:39:31,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:39:31,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:39:31,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:39:31,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:39:31,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:39:31,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:39:31,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:39:31,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:39:31,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:39:31,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:39:31,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:39:31,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:39:31,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:39:31,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:39:31,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:39:31,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:39:31,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:39:31,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:39:31,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:39:31,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:39:31,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:39:31,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:39:31,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:39:31,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:39:31,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:39:31,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:39:31,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:39:31,220 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:39:31,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:39:31,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:39:31,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:39:31,222 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:39:31,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:39:31,222 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:39:31,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:39:31,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:39:31,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:39:31,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:39:31,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:39:31,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:39:31,223 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:39:31,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:39:31,224 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:39:31,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:39:31,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:39:31,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:39:31,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:39:31,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:39:31,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:39:31,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:39:31,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:39:31,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:39:31,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:39:31,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:39:31,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:39:31,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:39:31,504 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:39:31,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:39:31,520 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:39:31,522 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:39:31,522 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:39:31,523 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2019-11-06 18:39:31,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e611b65/e52aacbc23094eeaa7f7f54b5e250817/FLAGc835ceed6 [2019-11-06 18:39:32,012 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:39:32,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2019-11-06 18:39:32,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e611b65/e52aacbc23094eeaa7f7f54b5e250817/FLAGc835ceed6 [2019-11-06 18:39:32,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e611b65/e52aacbc23094eeaa7f7f54b5e250817 [2019-11-06 18:39:32,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:39:32,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:39:32,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:39:32,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:39:32,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:39:32,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:39:32" (1/1) ... [2019-11-06 18:39:32,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d8cd29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:32, skipping insertion in model container [2019-11-06 18:39:32,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:39:32" (1/1) ... [2019-11-06 18:39:32,439 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:39:32,458 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:39:32,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:39:32,680 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:39:32,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:39:32,741 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:39:32,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:32 WrapperNode [2019-11-06 18:39:32,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:39:32,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:39:32,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:39:32,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:39:32,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:32" (1/1) ... [2019-11-06 18:39:32,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:32" (1/1) ... [2019-11-06 18:39:32,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:32" (1/1) ... [2019-11-06 18:39:32,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:32" (1/1) ... [2019-11-06 18:39:32,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:32" (1/1) ... [2019-11-06 18:39:32,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:32" (1/1) ... [2019-11-06 18:39:32,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:32" (1/1) ... [2019-11-06 18:39:32,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:39:32,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:39:32,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:39:32,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:39:32,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:39:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:39:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:39:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:39:32,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:39:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:39:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:39:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:39:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:39:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:39:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:39:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:39:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:39:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:39:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:39:33,216 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:39:33,217 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 18:39:33,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:39:33 BoogieIcfgContainer [2019-11-06 18:39:33,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:39:33,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:39:33,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:39:33,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:39:33,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:39:32" (1/3) ... [2019-11-06 18:39:33,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f18e63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:39:33, skipping insertion in model container [2019-11-06 18:39:33,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:32" (2/3) ... [2019-11-06 18:39:33,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f18e63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:39:33, skipping insertion in model container [2019-11-06 18:39:33,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:39:33" (3/3) ... [2019-11-06 18:39:33,243 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2019-11-06 18:39:33,258 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:39:33,269 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:39:33,284 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:39:33,309 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:39:33,309 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:39:33,309 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:39:33,309 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:39:33,310 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:39:33,310 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:39:33,310 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:39:33,310 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:39:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:39:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:39:33,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:33,332 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:33,334 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:33,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:33,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1746448729, now seen corresponding path program 1 times [2019-11-06 18:39:33,346 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:33,346 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553590062] [2019-11-06 18:39:33,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:33,565 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553590062] [2019-11-06 18:39:33,568 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:33,569 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:39:33,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453921791] [2019-11-06 18:39:33,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:39:33,578 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:33,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:39:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:39:33,597 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:39:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:33,711 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2019-11-06 18:39:33,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:39:33,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:39:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:33,722 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:39:33,722 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:39:33,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:39:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:39:33,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:39:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:39:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-06 18:39:33,766 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-11-06 18:39:33,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:33,767 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-06 18:39:33,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:39:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-06 18:39:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:39:33,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:33,769 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:33,769 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:33,770 INFO L82 PathProgramCache]: Analyzing trace with hash 934485258, now seen corresponding path program 1 times [2019-11-06 18:39:33,770 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:33,770 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075317522] [2019-11-06 18:39:33,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:33,869 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075317522] [2019-11-06 18:39:33,869 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:33,870 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:39:33,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438027285] [2019-11-06 18:39:33,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:39:33,872 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:33,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:39:33,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:33,873 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-11-06 18:39:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:33,961 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-06 18:39:33,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:39:33,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:39:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:33,963 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:39:33,963 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:39:33,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:33,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:39:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-06 18:39:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:39:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:39:33,972 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2019-11-06 18:39:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:33,973 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:39:33,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:39:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:39:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:39:33,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:33,974 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:33,974 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:33,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:33,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1806235348, now seen corresponding path program 1 times [2019-11-06 18:39:33,975 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:33,976 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798900718] [2019-11-06 18:39:33,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:34,111 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798900718] [2019-11-06 18:39:34,111 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558644472] [2019-11-06 18:39:34,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:34,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:39:34,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:34,208 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:39:34,208 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 18:39:34,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527234589] [2019-11-06 18:39:34,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:39:34,209 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:34,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:39:34,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:34,210 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 18:39:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:34,241 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-11-06 18:39:34,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:39:34,242 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-06 18:39:34,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:34,243 INFO L225 Difference]: With dead ends: 50 [2019-11-06 18:39:34,243 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:39:34,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:34,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:39:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 18:39:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:39:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:39:34,251 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2019-11-06 18:39:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:34,251 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:39:34,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:39:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:39:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:39:34,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:34,252 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] [2019-11-06 18:39:34,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:34,464 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:34,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:34,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1568565518, now seen corresponding path program 1 times [2019-11-06 18:39:34,465 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:34,465 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429381223] [2019-11-06 18:39:34,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:34,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429381223] [2019-11-06 18:39:34,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215970308] [2019-11-06 18:39:34,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:34,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:39:34,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:34,688 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:34,688 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 18:39:34,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583577685] [2019-11-06 18:39:34,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:39:34,689 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:34,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:39:34,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:39:34,690 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 18:39:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:34,904 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2019-11-06 18:39:34,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:39:34,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-06 18:39:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:34,908 INFO L225 Difference]: With dead ends: 78 [2019-11-06 18:39:34,908 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 18:39:34,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:39:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 18:39:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2019-11-06 18:39:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:39:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-11-06 18:39:34,922 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2019-11-06 18:39:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:34,923 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-11-06 18:39:34,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:39:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-11-06 18:39:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:39:34,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:34,927 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:35,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:35,132 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash 317446851, now seen corresponding path program 1 times [2019-11-06 18:39:35,134 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:35,134 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021060821] [2019-11-06 18:39:35,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:39:35,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021060821] [2019-11-06 18:39:35,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279706177] [2019-11-06 18:39:35,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:35,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:39:35,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:39:35,325 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:35,325 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-06 18:39:35,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647376635] [2019-11-06 18:39:35,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:39:35,326 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:35,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:39:35,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:39:35,327 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 9 states. [2019-11-06 18:39:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:35,425 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-11-06 18:39:35,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:39:35,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-06 18:39:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:35,427 INFO L225 Difference]: With dead ends: 70 [2019-11-06 18:39:35,427 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:39:35,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:39:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:39:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:39:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:39:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-11-06 18:39:35,436 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2019-11-06 18:39:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:35,436 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-11-06 18:39:35,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:39:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-11-06 18:39:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:39:35,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:35,437 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:35,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:35,638 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:35,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1146435745, now seen corresponding path program 2 times [2019-11-06 18:39:35,639 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:35,639 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312906343] [2019-11-06 18:39:35,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:39:35,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312906343] [2019-11-06 18:39:35,726 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153551659] [2019-11-06 18:39:35,726 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:35,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:35,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:35,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:39:35,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:39:35,837 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:35,837 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-06 18:39:35,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086596053] [2019-11-06 18:39:35,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:39:35,846 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:35,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:39:35,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:39:35,847 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 11 states. [2019-11-06 18:39:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:36,202 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2019-11-06 18:39:36,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:39:36,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2019-11-06 18:39:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:36,204 INFO L225 Difference]: With dead ends: 113 [2019-11-06 18:39:36,204 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:39:36,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:39:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:39:36,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 50. [2019-11-06 18:39:36,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 18:39:36,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-11-06 18:39:36,215 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 29 [2019-11-06 18:39:36,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:36,215 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-11-06 18:39:36,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:39:36,215 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-11-06 18:39:36,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:39:36,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:36,217 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:36,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:36,421 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:36,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash 321576404, now seen corresponding path program 3 times [2019-11-06 18:39:36,422 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:36,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329905175] [2019-11-06 18:39:36,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:39:36,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329905175] [2019-11-06 18:39:36,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62657191] [2019-11-06 18:39:36,505 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:36,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:39:36,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:36,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-06 18:39:36,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:36,705 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-11-06 18:39:36,706 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:36,709 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:36,709 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:36,709 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-11-06 18:39:36,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-06 18:39:36,754 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:36,754 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2019-11-06 18:39:36,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121282046] [2019-11-06 18:39:36,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:39:36,755 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:36,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:39:36,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:39:36,756 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 17 states. [2019-11-06 18:39:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:37,241 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2019-11-06 18:39:37,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:39:37,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2019-11-06 18:39:37,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:37,244 INFO L225 Difference]: With dead ends: 113 [2019-11-06 18:39:37,244 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 18:39:37,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:39:37,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 18:39:37,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2019-11-06 18:39:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:39:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2019-11-06 18:39:37,256 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 34 [2019-11-06 18:39:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:37,256 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2019-11-06 18:39:37,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:39:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2019-11-06 18:39:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:39:37,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:37,258 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:37,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:37,461 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:37,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:37,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1613423984, now seen corresponding path program 1 times [2019-11-06 18:39:37,462 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:37,463 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030192328] [2019-11-06 18:39:37,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 18:39:37,587 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030192328] [2019-11-06 18:39:37,587 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129878187] [2019-11-06 18:39:37,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:37,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:39:37,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:39:37,730 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:37,731 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-06 18:39:37,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518821885] [2019-11-06 18:39:37,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:39:37,732 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:37,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:39:37,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:39:37,732 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 15 states. [2019-11-06 18:39:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:38,099 INFO L93 Difference]: Finished difference Result 204 states and 247 transitions. [2019-11-06 18:39:38,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:39:38,100 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2019-11-06 18:39:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:38,103 INFO L225 Difference]: With dead ends: 204 [2019-11-06 18:39:38,104 INFO L226 Difference]: Without dead ends: 152 [2019-11-06 18:39:38,105 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:39:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-06 18:39:38,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-11-06 18:39:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-06 18:39:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2019-11-06 18:39:38,118 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 36 [2019-11-06 18:39:38,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:38,118 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2019-11-06 18:39:38,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:39:38,119 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2019-11-06 18:39:38,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:39:38,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:38,120 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:38,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:38,323 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:38,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1163880982, now seen corresponding path program 4 times [2019-11-06 18:39:38,324 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:38,324 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136505641] [2019-11-06 18:39:38,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-06 18:39:38,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136505641] [2019-11-06 18:39:38,385 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:38,385 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:39:38,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054502361] [2019-11-06 18:39:38,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:39:38,386 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:39:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:38,386 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 4 states. [2019-11-06 18:39:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:38,465 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2019-11-06 18:39:38,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:39:38,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-11-06 18:39:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:38,467 INFO L225 Difference]: With dead ends: 97 [2019-11-06 18:39:38,467 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 18:39:38,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 18:39:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-11-06 18:39:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:39:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2019-11-06 18:39:38,485 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 38 [2019-11-06 18:39:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:38,485 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2019-11-06 18:39:38,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:39:38,489 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2019-11-06 18:39:38,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:39:38,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:38,490 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:38,490 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:38,493 INFO L82 PathProgramCache]: Analyzing trace with hash -216190442, now seen corresponding path program 1 times [2019-11-06 18:39:38,493 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:38,494 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733382879] [2019-11-06 18:39:38,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:39:38,617 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733382879] [2019-11-06 18:39:38,617 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765093070] [2019-11-06 18:39:38,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:39:38,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:39:38,772 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:38,772 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-11-06 18:39:38,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778691070] [2019-11-06 18:39:38,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:39:38,773 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:38,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:39:38,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:39:38,774 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 17 states. [2019-11-06 18:39:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:38,883 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2019-11-06 18:39:38,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:39:38,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2019-11-06 18:39:38,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:38,885 INFO L225 Difference]: With dead ends: 122 [2019-11-06 18:39:38,885 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:39:38,886 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:39:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:39:38,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-06 18:39:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:39:38,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2019-11-06 18:39:38,895 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 40 [2019-11-06 18:39:38,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:38,895 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2019-11-06 18:39:38,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:39:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2019-11-06 18:39:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:39:38,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:38,896 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:39,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:39,105 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:39,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:39,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2065183496, now seen corresponding path program 2 times [2019-11-06 18:39:39,105 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:39,105 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812989047] [2019-11-06 18:39:39,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:39:39,211 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812989047] [2019-11-06 18:39:39,211 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382235651] [2019-11-06 18:39:39,212 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:39,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:39,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:39,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:39:39,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:39:39,400 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:39,400 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-11-06 18:39:39,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748922319] [2019-11-06 18:39:39,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:39:39,401 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:39,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:39:39,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:39:39,402 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 19 states. [2019-11-06 18:39:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:39,490 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2019-11-06 18:39:39,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:39:39,490 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2019-11-06 18:39:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:39,491 INFO L225 Difference]: With dead ends: 124 [2019-11-06 18:39:39,491 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:39:39,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:39:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:39:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 18:39:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:39:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2019-11-06 18:39:39,501 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 42 [2019-11-06 18:39:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:39,501 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2019-11-06 18:39:39,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:39:39,501 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2019-11-06 18:39:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 18:39:39,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:39,502 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:39,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:39,706 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:39,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:39,707 INFO L82 PathProgramCache]: Analyzing trace with hash -831047846, now seen corresponding path program 3 times [2019-11-06 18:39:39,707 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:39,707 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517113744] [2019-11-06 18:39:39,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:39:39,832 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517113744] [2019-11-06 18:39:39,832 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108656295] [2019-11-06 18:39:39,833 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:39,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:39:39,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:39,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:39:39,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:40,042 INFO L341 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2019-11-06 18:39:40,042 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 59 [2019-11-06 18:39:40,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:40,044 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:40,070 INFO L567 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2019-11-06 18:39:40,071 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:40,071 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:43 [2019-11-06 18:39:40,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:46,234 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 34 [2019-11-06 18:39:46,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:52,279 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-11-06 18:39:54,349 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 25 [2019-11-06 18:39:54,355 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:39:54,356 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:39:54,357 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:39:54,358 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:54,358 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 11 [2019-11-06 18:39:54,359 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:54,368 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:54,368 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:54,368 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:4 [2019-11-06 18:39:54,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:39:54,425 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:54,425 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2019-11-06 18:39:54,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434657472] [2019-11-06 18:39:54,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:39:54,426 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:54,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:39:54,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=449, Unknown=4, NotChecked=0, Total=552 [2019-11-06 18:39:54,427 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 24 states.