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/ldv-regression/ex3_forlist.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:09:12,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:09:12,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:09:12,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:09:12,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:09:12,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:09:12,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:09:12,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:09:12,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:09:12,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:09:12,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:09:12,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:09:12,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:09:12,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:09:12,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:09:12,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:09:12,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:09:12,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:09:12,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:09:12,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:09:12,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:09:12,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:09:12,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:09:12,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:09:12,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:09:12,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:09:12,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:09:12,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:09:12,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:09:12,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:09:12,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:09:12,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:09:12,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:09:12,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:09:12,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:09:12,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:09:12,884 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 [2019-10-13 19:09:12,906 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:09:12,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:09:12,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:09:12,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:09:12,908 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:09:12,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:09:12,909 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:09:12,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:09:12,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:09:12,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:09:12,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:09:12,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:09:12,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:09:12,911 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:09:12,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:09:12,912 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:09:12,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:09:12,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:09:12,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:09:12,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:09:12,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:09:12,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:09:12,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:09:12,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:09:12,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:09:12,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:09:12,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:09:12,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:09:12,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:09:13,189 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:09:13,201 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:09:13,205 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:09:13,206 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:09:13,207 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:09:13,207 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/ex3_forlist.i [2019-10-13 19:09:13,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fcc9c328/a4d177fb817640429b1b8ddf09b06898/FLAGbf295516a [2019-10-13 19:09:13,708 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:09:13,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/ex3_forlist.i [2019-10-13 19:09:13,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fcc9c328/a4d177fb817640429b1b8ddf09b06898/FLAGbf295516a [2019-10-13 19:09:14,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fcc9c328/a4d177fb817640429b1b8ddf09b06898 [2019-10-13 19:09:14,108 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:09:14,109 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:09:14,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:09:14,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:09:14,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:09:14,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:09:14" (1/1) ... [2019-10-13 19:09:14,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e69fe22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:14, skipping insertion in model container [2019-10-13 19:09:14,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:09:14" (1/1) ... [2019-10-13 19:09:14,125 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:09:14,143 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:09:14,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:09:14,330 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:09:14,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:09:14,456 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:09:14,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:14 WrapperNode [2019-10-13 19:09:14,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:09:14,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:09:14,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:09:14,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:09:14,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:14" (1/1) ... [2019-10-13 19:09:14,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:14" (1/1) ... [2019-10-13 19:09:14,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:14" (1/1) ... [2019-10-13 19:09:14,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:14" (1/1) ... [2019-10-13 19:09:14,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:14" (1/1) ... [2019-10-13 19:09:14,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:14" (1/1) ... [2019-10-13 19:09:14,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:14" (1/1) ... [2019-10-13 19:09:14,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:09:14,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:09:14,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:09:14,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:09:14,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:14" (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 [2019-10-13 19:09:14,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:09:14,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:09:14,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-10-13 19:09:14,553 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2019-10-13 19:09:14,553 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-10-13 19:09:14,553 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-10-13 19:09:14,553 INFO L138 BoogieDeclarations]: Found implementation of procedure malloc [2019-10-13 19:09:14,553 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:09:14,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:09:14,554 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-10-13 19:09:14,554 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-13 19:09:14,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 19:09:14,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:09:14,554 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-10-13 19:09:14,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 19:09:14,555 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-10-13 19:09:14,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:09:14,555 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 19:09:14,555 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:09:14,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:09:14,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:09:14,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-13 19:09:14,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 19:09:14,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:09:14,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:09:14,906 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:09:14,906 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 19:09:14,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:09:14 BoogieIcfgContainer [2019-10-13 19:09:14,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:09:14,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:09:14,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:09:14,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:09:14,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:09:14" (1/3) ... [2019-10-13 19:09:14,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fcf1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:09:14, skipping insertion in model container [2019-10-13 19:09:14,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:14" (2/3) ... [2019-10-13 19:09:14,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fcf1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:09:14, skipping insertion in model container [2019-10-13 19:09:14,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:09:14" (3/3) ... [2019-10-13 19:09:14,915 INFO L109 eAbstractionObserver]: Analyzing ICFG ex3_forlist.i [2019-10-13 19:09:14,924 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:09:14,932 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:09:14,943 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:09:14,972 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:09:14,972 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:09:14,972 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:09:14,972 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:09:14,972 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:09:14,972 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:09:14,972 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:09:14,973 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:09:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2019-10-13 19:09:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 19:09:14,994 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:09:14,994 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 19:09:14,997 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:09:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:09:15,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1451885248, now seen corresponding path program 1 times [2019-10-13 19:09:15,008 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:09:15,008 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787963972] [2019-10-13 19:09:15,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:15,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:15,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:09:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:09:15,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787963972] [2019-10-13 19:09:15,368 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:09:15,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:09:15,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851769062] [2019-10-13 19:09:15,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:09:15,376 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:09:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:09:15,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:09:15,394 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2019-10-13 19:09:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:09:15,848 INFO L93 Difference]: Finished difference Result 96 states and 132 transitions. [2019-10-13 19:09:15,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:09:15,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2019-10-13 19:09:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:09:15,872 INFO L225 Difference]: With dead ends: 96 [2019-10-13 19:09:15,873 INFO L226 Difference]: Without dead ends: 53 [2019-10-13 19:09:15,880 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:09:15,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-13 19:09:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2019-10-13 19:09:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 19:09:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-10-13 19:09:15,947 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 39 [2019-10-13 19:09:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:09:15,948 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-10-13 19:09:15,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:09:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-10-13 19:09:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 19:09:15,955 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:09:15,956 INFO L380 BasicCegarLoop]: trace histogram [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, 1] [2019-10-13 19:09:15,956 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:09:15,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:09:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash -507187170, now seen corresponding path program 1 times [2019-10-13 19:09:15,957 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:09:15,957 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795764762] [2019-10-13 19:09:15,958 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:15,958 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:15,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:09:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 19:09:16,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795764762] [2019-10-13 19:09:16,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340345992] [2019-10-13 19:09:16,170 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 [2019-10-13 19:09:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 19:09:16,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:09:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 19:09:16,280 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:09:16,280 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-13 19:09:16,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106324299] [2019-10-13 19:09:16,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:09:16,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:09:16,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:09:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:09:16,283 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 3 states. [2019-10-13 19:09:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:09:16,316 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2019-10-13 19:09:16,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:09:16,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2019-10-13 19:09:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:09:16,319 INFO L225 Difference]: With dead ends: 67 [2019-10-13 19:09:16,319 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:09:16,320 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:09:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:09:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2019-10-13 19:09:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 19:09:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2019-10-13 19:09:16,332 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 41 [2019-10-13 19:09:16,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:09:16,332 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2019-10-13 19:09:16,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:09:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2019-10-13 19:09:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 19:09:16,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:09:16,334 INFO L380 BasicCegarLoop]: trace histogram [2, 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, 1] [2019-10-13 19:09:16,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:09:16,539 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:09:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:09:16,540 INFO L82 PathProgramCache]: Analyzing trace with hash -75669472, now seen corresponding path program 1 times [2019-10-13 19:09:16,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:09:16,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826605875] [2019-10-13 19:09:16,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:16,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:16,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:09:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 19:09:16,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826605875] [2019-10-13 19:09:16,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389017848] [2019-10-13 19:09:16,736 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 [2019-10-13 19:09:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:16,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:09:16,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:09:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 19:09:16,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:09:16,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 7 [2019-10-13 19:09:16,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602789217] [2019-10-13 19:09:16,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:09:16,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:09:16,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:09:16,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:09:16,840 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 7 states. [2019-10-13 19:09:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:09:17,231 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2019-10-13 19:09:17,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:09:17,231 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-10-13 19:09:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:09:17,233 INFO L225 Difference]: With dead ends: 87 [2019-10-13 19:09:17,233 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 19:09:17,235 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:09:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 19:09:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2019-10-13 19:09:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 19:09:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2019-10-13 19:09:17,255 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 43 [2019-10-13 19:09:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:09:17,256 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2019-10-13 19:09:17,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:09:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2019-10-13 19:09:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 19:09:17,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:09:17,260 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:09:17,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:09:17,463 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:09:17,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:09:17,464 INFO L82 PathProgramCache]: Analyzing trace with hash -176141410, now seen corresponding path program 2 times [2019-10-13 19:09:17,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:09:17,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171368898] [2019-10-13 19:09:17,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:17,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:17,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:09:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 19:09:18,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171368898] [2019-10-13 19:09:18,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459855548] [2019-10-13 19:09:18,070 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:09:18,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 19:09:18,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:09:18,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 19:09:18,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:09:18,232 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 11 treesize of output 7 [2019-10-13 19:09:18,233 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:09:18,238 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:09:18,239 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:09:18,239 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-13 19:09:18,310 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 [2019-10-13 19:09:18,310 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:09:18,312 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:09:18,312 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:09:18,313 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 19:09:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 19:09:18,339 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:09:18,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 23 [2019-10-13 19:09:18,340 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864060147] [2019-10-13 19:09:18,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:09:18,341 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:09:18,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:09:18,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:09:18,342 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 7 states. [2019-10-13 19:09:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:09:18,613 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2019-10-13 19:09:18,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:09:18,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-10-13 19:09:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:09:18,616 INFO L225 Difference]: With dead ends: 89 [2019-10-13 19:09:18,616 INFO L226 Difference]: Without dead ends: 77 [2019-10-13 19:09:18,617 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:09:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-13 19:09:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2019-10-13 19:09:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-13 19:09:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2019-10-13 19:09:18,632 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 45 [2019-10-13 19:09:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:09:18,633 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2019-10-13 19:09:18,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:09:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2019-10-13 19:09:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 19:09:18,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:09:18,635 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2019-10-13 19:09:18,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:09:18,839 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:09:18,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:09:18,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1465709063, now seen corresponding path program 1 times [2019-10-13 19:09:18,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:09:18,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088426472] [2019-10-13 19:09:18,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:18,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:18,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:09:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 19:09:19,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088426472] [2019-10-13 19:09:19,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289559042] [2019-10-13 19:09:19,375 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 [2019-10-13 19:09:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:19,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-13 19:09:19,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:09:19,469 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2019-10-13 19:09:19,470 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-13 19:09:19,491 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-10-13 19:09:19,491 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:09:19,491 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2019-10-13 19:09:19,687 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 31 treesize of output 7 [2019-10-13 19:09:19,688 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:09:19,694 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:09:19,694 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:09:19,694 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:15 [2019-10-13 19:09:19,764 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 7 treesize of output 3 [2019-10-13 19:09:19,764 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:09:19,768 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:09:19,769 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:09:19,769 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2019-10-13 19:09:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 19:09:19,904 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:09:19,904 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2019-10-13 19:09:19,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324115082] [2019-10-13 19:09:19,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 19:09:19,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:09:19,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 19:09:19,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2019-10-13 19:09:19,908 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 30 states. [2019-10-13 19:09:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:09:21,881 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2019-10-13 19:09:21,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 19:09:21,882 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 48 [2019-10-13 19:09:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:09:21,884 INFO L225 Difference]: With dead ends: 137 [2019-10-13 19:09:21,885 INFO L226 Difference]: Without dead ends: 110 [2019-10-13 19:09:21,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=297, Invalid=1865, Unknown=0, NotChecked=0, Total=2162 [2019-10-13 19:09:21,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-13 19:09:21,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2019-10-13 19:09:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-13 19:09:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2019-10-13 19:09:21,904 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 48 [2019-10-13 19:09:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:09:21,904 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2019-10-13 19:09:21,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 19:09:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2019-10-13 19:09:21,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 19:09:21,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:09:21,906 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1] [2019-10-13 19:09:22,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:09:22,116 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:09:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:09:22,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1177779125, now seen corresponding path program 1 times [2019-10-13 19:09:22,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:09:22,118 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315812816] [2019-10-13 19:09:22,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:22,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:09:22,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:09:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 19:09:22,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315812816] [2019-10-13 19:09:22,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926775053] [2019-10-13 19:09:22,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:09:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:09:22,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-13 19:09:22,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:09:22,748 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2019-10-13 19:09:22,748 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:09:22,761 INFO L567 ElimStorePlain]: treesize reduction 12, result has 47.8 percent of original size [2019-10-13 19:09:22,762 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:09:22,762 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2019-10-13 19:09:22,936 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 11 treesize of output 7 [2019-10-13 19:09:22,936 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:09:22,942 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:09:22,943 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:09:22,943 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-10-13 19:09:22,977 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2019-10-13 19:09:22,978 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:09:22,983 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:09:22,984 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:09:22,984 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2019-10-13 19:09:23,080 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:09:23,096 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:09:23,097 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-13 19:09:23,097 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:50 [2019-10-13 19:09:39,397 WARN L191 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 28 [2019-10-13 19:09:39,407 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:09:39,409 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2019-10-13 19:09:39,409 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:09:39,421 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:09:39,423 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:09:39,423 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:57, output treesize:25 [2019-10-13 19:09:39,564 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:09:39,565 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:09:39,566 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2019-10-13 19:09:39,566 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:09:39,572 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:09:39,572 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:09:39,572 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-10-13 19:09:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:09:39,583 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:09:39,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2019-10-13 19:09:39,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047556101] [2019-10-13 19:09:39,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 19:09:39,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:09:39,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 19:09:39,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=864, Unknown=12, NotChecked=0, Total=992 [2019-10-13 19:09:39,585 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand 32 states.