/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-tiling/pnr4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:52:50,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:52:50,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:52:50,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:52:50,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:52:50,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:52:50,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:52:50,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:52:50,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:52:50,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:52:50,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:52:50,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:52:50,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:52:50,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:52:50,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:52:50,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:52:50,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:52:50,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:52:50,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:52:50,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:52:50,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:52:50,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:52:50,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:52:50,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:52:50,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:52:50,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:52:50,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:52:50,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:52:50,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:52:50,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:52:50,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:52:50,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:52:50,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:52:50,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:52:50,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:52:50,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:52:50,186 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 18:52:50,203 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:52:50,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:52:50,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:52:50,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:52:50,205 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:52:50,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:52:50,205 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:52:50,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:52:50,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:52:50,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:52:50,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:52:50,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:52:50,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:52:50,207 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:52:50,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:52:50,207 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:52:50,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:52:50,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:52:50,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:52:50,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:52:50,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:52:50,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:52:50,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:52:50,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:52:50,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:52:50,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:52:50,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:52:50,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:52:50,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:52:50,498 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:52:50,509 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:52:50,512 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:52:50,513 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:52:50,513 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:52:50,514 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr4.c [2019-11-06 18:52:50,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539436874/f4423dc3abd0464b890447b8e4607ec9/FLAGf79bb214f [2019-11-06 18:52:51,065 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:52:51,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr4.c [2019-11-06 18:52:51,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539436874/f4423dc3abd0464b890447b8e4607ec9/FLAGf79bb214f [2019-11-06 18:52:51,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539436874/f4423dc3abd0464b890447b8e4607ec9 [2019-11-06 18:52:51,441 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:52:51,443 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:52:51,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:52:51,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:52:51,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:52:51,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:52:51" (1/1) ... [2019-11-06 18:52:51,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d29ed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:51, skipping insertion in model container [2019-11-06 18:52:51,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:52:51" (1/1) ... [2019-11-06 18:52:51,459 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:52:51,476 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:52:51,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:52:51,711 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:52:51,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:52:51,851 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:52:51,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:51 WrapperNode [2019-11-06 18:52:51,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:52:51,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:52:51,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:52:51,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:52:51,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:51" (1/1) ... [2019-11-06 18:52:51,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:51" (1/1) ... [2019-11-06 18:52:51,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:51" (1/1) ... [2019-11-06 18:52:51,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:51" (1/1) ... [2019-11-06 18:52:51,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:51" (1/1) ... [2019-11-06 18:52:51,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:51" (1/1) ... [2019-11-06 18:52:51,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:51" (1/1) ... [2019-11-06 18:52:51,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:52:51,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:52:51,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:52:51,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:52:51,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:51" (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 18:52:51,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:52:51,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:52:51,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:52:51,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2019-11-06 18:52:51,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:52:51,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:52:51,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:52:51,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:52:51,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:52:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:52:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2019-11-06 18:52:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:52:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:52:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:52:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:52:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:52:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:52:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:52:52,276 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:52:52,277 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 18:52:52,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:52:52 BoogieIcfgContainer [2019-11-06 18:52:52,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:52:52,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:52:52,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:52:52,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:52:52,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:52:51" (1/3) ... [2019-11-06 18:52:52,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67dbaf6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:52:52, skipping insertion in model container [2019-11-06 18:52:52,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:51" (2/3) ... [2019-11-06 18:52:52,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67dbaf6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:52:52, skipping insertion in model container [2019-11-06 18:52:52,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:52:52" (3/3) ... [2019-11-06 18:52:52,307 INFO L109 eAbstractionObserver]: Analyzing ICFG pnr4.c [2019-11-06 18:52:52,332 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:52:52,346 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:52:52,362 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:52:52,392 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:52:52,392 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:52:52,393 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:52:52,393 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:52:52,393 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:52:52,393 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:52:52,393 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:52:52,393 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:52:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-11-06 18:52:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:52:52,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:52,418 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:52,420 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:52,426 INFO L82 PathProgramCache]: Analyzing trace with hash -315503509, now seen corresponding path program 1 times [2019-11-06 18:52:52,433 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:52,433 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396348701] [2019-11-06 18:52:52,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:52,617 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 18:52:52,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396348701] [2019-11-06 18:52:52,618 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:52:52,619 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:52:52,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31620576] [2019-11-06 18:52:52,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:52:52,625 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:52,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:52:52,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:52:52,641 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2019-11-06 18:52:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:52,811 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2019-11-06 18:52:52,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:52:52,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:52:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:52,823 INFO L225 Difference]: With dead ends: 57 [2019-11-06 18:52:52,824 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:52:52,827 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 18:52:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:52:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-06 18:52:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:52:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2019-11-06 18:52:52,876 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 15 [2019-11-06 18:52:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:52,877 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2019-11-06 18:52:52,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:52:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2019-11-06 18:52:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:52:52,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:52,879 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:52,880 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:52,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1206598662, now seen corresponding path program 1 times [2019-11-06 18:52:52,881 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:52,881 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674696633] [2019-11-06 18:52:52,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,153 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 18:52:53,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674696633] [2019-11-06 18:52:53,156 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:52:53,157 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:52:53,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946766508] [2019-11-06 18:52:53,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:52:53,161 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:53,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:52:53,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:52:53,162 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 5 states. [2019-11-06 18:52:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:53,425 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2019-11-06 18:52:53,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:52:53,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-06 18:52:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:53,429 INFO L225 Difference]: With dead ends: 61 [2019-11-06 18:52:53,429 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 18:52:53,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:52:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 18:52:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2019-11-06 18:52:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 18:52:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-06 18:52:53,478 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2019-11-06 18:52:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:53,478 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-06 18:52:53,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:52:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-06 18:52:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:52:53,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:53,482 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:53,482 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:53,486 INFO L82 PathProgramCache]: Analyzing trace with hash -788561807, now seen corresponding path program 1 times [2019-11-06 18:52:53,486 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:53,486 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558732623] [2019-11-06 18:52:53,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:52:53,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558732623] [2019-11-06 18:52:53,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998520988] [2019-11-06 18:52:53,915 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 18:52:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-06 18:52:53,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:54,095 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-06 18:52:54,096 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:54,109 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:54,111 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 18:52:54,113 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2019-11-06 18:52:54,163 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:52:54,163 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2019-11-06 18:52:54,164 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:54,175 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:54,176 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 18:52:54,176 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:17 [2019-11-06 18:52:54,207 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:52:54,207 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2019-11-06 18:52:54,208 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:54,218 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:54,219 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 18:52:54,219 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:17 [2019-11-06 18:52:54,244 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-06 18:52:54,245 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2019-11-06 18:52:54,246 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:54,253 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:54,254 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 18:52:54,255 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:8 [2019-11-06 18:52:54,292 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 18:52:54,293 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:54,295 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:54,296 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 18:52:54,296 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:4 [2019-11-06 18:52:54,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:52:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:52:54,337 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:54,337 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2019-11-06 18:52:54,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627678888] [2019-11-06 18:52:54,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:52:54,340 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:54,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:52:54,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:52:54,342 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 17 states. [2019-11-06 18:52:54,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:54,977 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2019-11-06 18:52:54,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:52:54,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2019-11-06 18:52:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:54,981 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:52:54,981 INFO L226 Difference]: Without dead ends: 91 [2019-11-06 18:52:54,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:52:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-06 18:52:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 58. [2019-11-06 18:52:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:52:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2019-11-06 18:52:54,998 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 41 [2019-11-06 18:52:54,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:54,999 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2019-11-06 18:52:54,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:52:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2019-11-06 18:52:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:52:55,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:55,001 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:55,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:55,206 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:55,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1134666227, now seen corresponding path program 1 times [2019-11-06 18:52:55,207 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:55,207 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608563677] [2019-11-06 18:52:55,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:52:55,530 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608563677] [2019-11-06 18:52:55,531 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129541634] [2019-11-06 18:52:55,531 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 18:52:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-06 18:52:55,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:55,629 INFO L375 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 16 treesize of output 12 [2019-11-06 18:52:55,630 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:55,637 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:55,638 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 18:52:55,638 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2019-11-06 18:52:55,729 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:52:55,729 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2019-11-06 18:52:55,730 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:55,739 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:55,740 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 18:52:55,740 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2019-11-06 18:52:55,812 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:52:55,813 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2019-11-06 18:52:55,813 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:55,821 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:55,822 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 18:52:55,822 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2019-11-06 18:52:55,876 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-06 18:52:55,877 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-11-06 18:52:55,878 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:55,883 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:55,883 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 18:52:55,884 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2019-11-06 18:52:55,960 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-06 18:52:55,962 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:55,966 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:55,967 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 18:52:55,967 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2019-11-06 18:52:55,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:52:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:52:56,036 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:56,036 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-11-06 18:52:56,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920706491] [2019-11-06 18:52:56,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:52:56,037 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:56,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:52:56,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:52:56,038 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 20 states. [2019-11-06 18:52:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:57,755 INFO L93 Difference]: Finished difference Result 187 states and 252 transitions. [2019-11-06 18:52:57,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:52:57,759 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2019-11-06 18:52:57,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:57,764 INFO L225 Difference]: With dead ends: 187 [2019-11-06 18:52:57,764 INFO L226 Difference]: Without dead ends: 185 [2019-11-06 18:52:57,766 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 18:52:57,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-11-06 18:52:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 43. [2019-11-06 18:52:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:52:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2019-11-06 18:52:57,782 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 41 [2019-11-06 18:52:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:57,782 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2019-11-06 18:52:57,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:52:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2019-11-06 18:52:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 18:52:57,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:57,784 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:57,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:57,992 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:57,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1964793258, now seen corresponding path program 1 times [2019-11-06 18:52:57,993 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:57,993 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508585091] [2019-11-06 18:52:57,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:52:58,158 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508585091] [2019-11-06 18:52:58,159 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042106744] [2019-11-06 18:52:58,159 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 18:52:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:58,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:52:58,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:58,240 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-06 18:52:58,240 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:58,246 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:58,247 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 18:52:58,247 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2019-11-06 18:52:58,267 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:52:58,268 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2019-11-06 18:52:58,269 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:58,276 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:58,276 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 18:52:58,277 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:17 [2019-11-06 18:52:58,294 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-11-06 18:52:58,294 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2019-11-06 18:52:58,295 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:58,301 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:58,301 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 18:52:58,302 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:10 [2019-11-06 18:52:58,315 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 20 treesize of output 8 [2019-11-06 18:52:58,316 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:58,317 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:58,318 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 18:52:58,318 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:4 [2019-11-06 18:52:58,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:52:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:52:58,357 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:58,358 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-11-06 18:52:58,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388668843] [2019-11-06 18:52:58,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:52:58,360 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:58,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:52:58,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:52:58,363 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 13 states. [2019-11-06 18:52:58,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:58,810 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2019-11-06 18:52:58,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:52:58,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-11-06 18:52:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:58,814 INFO L225 Difference]: With dead ends: 96 [2019-11-06 18:52:58,814 INFO L226 Difference]: Without dead ends: 94 [2019-11-06 18:52:58,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:52:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-06 18:52:58,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2019-11-06 18:52:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-06 18:52:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2019-11-06 18:52:58,833 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 49 [2019-11-06 18:52:58,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:58,834 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2019-11-06 18:52:58,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:52:58,834 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2019-11-06 18:52:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 18:52:58,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:58,836 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:59,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:59,039 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:59,040 INFO L82 PathProgramCache]: Analyzing trace with hash -578589864, now seen corresponding path program 1 times [2019-11-06 18:52:59,040 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:59,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839965635] [2019-11-06 18:52:59,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:52:59,256 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839965635] [2019-11-06 18:52:59,256 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090003638] [2019-11-06 18:52:59,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:59,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:52:59,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:59,404 INFO L375 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 16 treesize of output 12 [2019-11-06 18:52:59,405 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:59,416 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:59,417 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 18:52:59,417 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2019-11-06 18:52:59,497 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:52:59,498 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2019-11-06 18:52:59,498 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:59,506 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:59,507 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 18:52:59,507 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2019-11-06 18:52:59,556 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-11-06 18:52:59,556 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2019-11-06 18:52:59,557 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:59,564 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:59,564 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 18:52:59,564 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2019-11-06 18:52:59,664 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 19 treesize of output 7 [2019-11-06 18:52:59,664 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:59,673 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:59,673 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 18:52:59,673 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2019-11-06 18:52:59,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:52:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:52:59,737 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:59,737 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-11-06 18:52:59,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459532814] [2019-11-06 18:52:59,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:52:59,738 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:59,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:52:59,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:52:59,739 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 21 states. [2019-11-06 18:53:13,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:13,116 INFO L93 Difference]: Finished difference Result 193 states and 252 transitions. [2019-11-06 18:53:13,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:53:13,117 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2019-11-06 18:53:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:13,119 INFO L225 Difference]: With dead ends: 193 [2019-11-06 18:53:13,120 INFO L226 Difference]: Without dead ends: 191 [2019-11-06 18:53:13,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=1442, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:53:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-06 18:53:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 51. [2019-11-06 18:53:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:53:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-11-06 18:53:13,151 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 49 [2019-11-06 18:53:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:13,152 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-11-06 18:53:13,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:53:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-11-06 18:53:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 18:53:13,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:13,158 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:13,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:13,359 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:13,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1806823621, now seen corresponding path program 2 times [2019-11-06 18:53:13,361 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:13,361 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781591769] [2019-11-06 18:53:13,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-06 18:53:13,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781591769] [2019-11-06 18:53:13,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063565450] [2019-11-06 18:53:13,550 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:13,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:53:13,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:13,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:53:13,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:13,692 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-06 18:53:13,692 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:13,703 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:13,704 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 18:53:13,704 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2019-11-06 18:53:13,784 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:13,785 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2019-11-06 18:53:13,786 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:13,801 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:13,802 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 18:53:13,802 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:17 [2019-11-06 18:53:14,005 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 18:53:14,005 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:14,009 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:14,010 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 18:53:14,010 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:8 [2019-11-06 18:53:14,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:53:14,073 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:14,073 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-11-06 18:53:14,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103476372] [2019-11-06 18:53:14,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:53:14,078 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:14,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:53:14,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:53:14,079 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 22 states.