/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/pnr3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:52:47,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:52:47,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:52:47,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:52:47,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:52:47,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:52:47,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:52:47,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:52:47,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:52:47,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:52:47,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:52:47,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:52:47,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:52:47,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:52:47,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:52:47,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:52:47,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:52:47,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:52:47,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:52:47,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:52:47,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:52:47,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:52:47,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:52:47,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:52:47,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:52:47,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:52:47,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:52:47,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:52:47,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:52:47,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:52:47,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:52:47,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:52:47,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:52:47,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:52:47,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:52:47,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:52:47,900 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 18:52:47,934 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:52:47,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:52:47,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:52:47,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:52:47,936 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:52:47,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:52:47,937 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:52:47,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:52:47,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:52:47,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:52:47,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:52:47,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:52:47,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:52:47,939 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:52:47,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:52:47,939 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:52:47,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:52:47,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:52:47,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:52:47,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:52:47,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:52:47,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:52:47,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:52:47,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:52:47,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:52:47,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:52:47,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:52:47,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:52:47,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:52:48,210 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:52:48,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:52:48,225 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:52:48,226 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:52:48,227 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:52:48,227 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr3.c [2019-11-06 18:52:48,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fbb6b34a/88e1e39cc08147c8a0ee6ed7761d8ee0/FLAG932ab636d [2019-11-06 18:52:48,748 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:52:48,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr3.c [2019-11-06 18:52:48,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fbb6b34a/88e1e39cc08147c8a0ee6ed7761d8ee0/FLAG932ab636d [2019-11-06 18:52:49,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fbb6b34a/88e1e39cc08147c8a0ee6ed7761d8ee0 [2019-11-06 18:52:49,117 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:52:49,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:52:49,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:52:49,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:52:49,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:52:49,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:52:49" (1/1) ... [2019-11-06 18:52:49,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7890892c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:49, skipping insertion in model container [2019-11-06 18:52:49,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:52:49" (1/1) ... [2019-11-06 18:52:49,136 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:52:49,156 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:52:49,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:52:49,399 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:52:49,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:52:49,439 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:52:49,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:49 WrapperNode [2019-11-06 18:52:49,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:52:49,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:52:49,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:52:49,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:52:49,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:49" (1/1) ... [2019-11-06 18:52:49,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:49" (1/1) ... [2019-11-06 18:52:49,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:49" (1/1) ... [2019-11-06 18:52:49,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:49" (1/1) ... [2019-11-06 18:52:49,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:49" (1/1) ... [2019-11-06 18:52:49,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:49" (1/1) ... [2019-11-06 18:52:49,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:49" (1/1) ... [2019-11-06 18:52:49,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:52:49,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:52:49,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:52:49,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:52:49,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:49" (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 18:52:49,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:52:49,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:52:49,623 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:52:49,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2019-11-06 18:52:49,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:52:49,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:52:49,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:52:49,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:52:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:52:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:52:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2019-11-06 18:52:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:52:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:52:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:52:49,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:52:49,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:52:49,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:52:49,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:52:49,941 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:52:49,941 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 18:52:49,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:52:49 BoogieIcfgContainer [2019-11-06 18:52:49,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:52:49,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:52:49,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:52:49,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:52:49,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:52:49" (1/3) ... [2019-11-06 18:52:49,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17bdcd16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:52:49, skipping insertion in model container [2019-11-06 18:52:49,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:52:49" (2/3) ... [2019-11-06 18:52:49,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17bdcd16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:52:49, skipping insertion in model container [2019-11-06 18:52:49,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:52:49" (3/3) ... [2019-11-06 18:52:49,950 INFO L109 eAbstractionObserver]: Analyzing ICFG pnr3.c [2019-11-06 18:52:49,963 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:52:49,970 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:52:49,979 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:52:50,004 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:52:50,005 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:52:50,005 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:52:50,005 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:52:50,005 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:52:50,005 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:52:50,005 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:52:50,005 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:52:50,024 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-11-06 18:52:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:52:50,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:50,032 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:50,034 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 342601179, now seen corresponding path program 1 times [2019-11-06 18:52:50,047 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:50,047 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834295615] [2019-11-06 18:52:50,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:50,235 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 18:52:50,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834295615] [2019-11-06 18:52:50,236 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:52:50,237 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:52:50,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810500230] [2019-11-06 18:52:50,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:52:50,242 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:50,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:52:50,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:52:50,255 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2019-11-06 18:52:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:50,416 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-11-06 18:52:50,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:52:50,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:52:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:50,428 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:52:50,429 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 18:52:50,432 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 18:52:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 18:52:50,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-06 18:52:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:52:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-11-06 18:52:50,475 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 15 [2019-11-06 18:52:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:50,476 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-11-06 18:52:50,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:52:50,476 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-11-06 18:52:50,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:52:50,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:50,478 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:52:50,478 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:50,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:50,479 INFO L82 PathProgramCache]: Analyzing trace with hash 374798206, now seen corresponding path program 1 times [2019-11-06 18:52:50,479 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:50,480 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102984315] [2019-11-06 18:52:50,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:50,732 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 18:52:50,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102984315] [2019-11-06 18:52:50,733 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:52:50,733 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:52:50,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106252383] [2019-11-06 18:52:50,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:52:50,735 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:50,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:52:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:52:50,736 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 5 states. [2019-11-06 18:52:50,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:50,952 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2019-11-06 18:52:50,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:52:50,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-06 18:52:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:50,955 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:52:50,955 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:52:50,956 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 18:52:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:52:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2019-11-06 18:52:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:52:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-06 18:52:50,970 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 15 [2019-11-06 18:52:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:50,970 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-06 18:52:50,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:52:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-06 18:52:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:52:50,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:50,972 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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 18:52:50,973 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash 919940654, now seen corresponding path program 1 times [2019-11-06 18:52:50,974 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:50,974 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424393004] [2019-11-06 18:52:50,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:52:51,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424393004] [2019-11-06 18:52:51,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658081004] [2019-11-06 18:52:51,407 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 18:52:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:51,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:52:51,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:51,619 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 18:52:51,619 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:51,628 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:51,629 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 18:52:51,629 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2019-11-06 18:52:51,700 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:52:51,700 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 18:52:51,701 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:51,710 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:51,710 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 18:52:51,711 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:17 [2019-11-06 18:52:51,732 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-06 18:52:51,733 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 18:52:51,735 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:51,743 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:51,743 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 18:52:51,744 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:8 [2019-11-06 18:52:51,778 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 18:52:51,779 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:51,781 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:51,781 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 18:52:51,781 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:4 [2019-11-06 18:52:51,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:52:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:52:51,826 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:51,826 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2019-11-06 18:52:51,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843479536] [2019-11-06 18:52:51,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:52:51,827 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:51,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:52:51,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:52:51,828 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 17 states. [2019-11-06 18:52:52,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:52,472 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2019-11-06 18:52:52,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:52:52,476 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2019-11-06 18:52:52,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:52,478 INFO L225 Difference]: With dead ends: 81 [2019-11-06 18:52:52,478 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:52:52,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:52:52,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:52:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2019-11-06 18:52:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:52:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2019-11-06 18:52:52,502 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 35 [2019-11-06 18:52:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:52,503 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2019-11-06 18:52:52,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:52:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2019-11-06 18:52:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:52:52,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:52,507 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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 18:52:52,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:52,709 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:52,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1342642480, now seen corresponding path program 1 times [2019-11-06 18:52:52,710 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:52,711 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157890889] [2019-11-06 18:52:52,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:52:53,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157890889] [2019-11-06 18:52:53,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993567369] [2019-11-06 18:52:53,094 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 18:52:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:53,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:52:53,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:53,200 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 18:52:53,200 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:53,209 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:53,210 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 18:52:53,211 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2019-11-06 18:52:53,311 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-11-06 18:52:53,311 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 18:52:53,312 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:53,321 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:53,322 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 18:52:53,322 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2019-11-06 18:52:53,390 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-06 18:52:53,391 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 18:52:53,392 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:53,397 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:53,398 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 18:52:53,398 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2019-11-06 18:52:53,454 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 18:52:53,456 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:53,464 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:53,465 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 18:52:53,465 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2019-11-06 18:52:53,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:52:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:52:53,523 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:53,523 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-11-06 18:52:53,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412244659] [2019-11-06 18:52:53,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:52:53,524 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:53,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:52:53,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:52:53,525 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 20 states. [2019-11-06 18:52:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:55,021 INFO L93 Difference]: Finished difference Result 163 states and 212 transitions. [2019-11-06 18:52:55,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:52:55,022 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2019-11-06 18:52:55,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:55,026 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:52:55,027 INFO L226 Difference]: Without dead ends: 161 [2019-11-06 18:52:55,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 18:52:55,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-06 18:52:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 40. [2019-11-06 18:52:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:52:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-11-06 18:52:55,046 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 35 [2019-11-06 18:52:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:55,047 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-11-06 18:52:55,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:52:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-11-06 18:52:55,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:52:55,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:55,050 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-06 18:52:55,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:55,252 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:55,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:55,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1026063511, now seen corresponding path program 1 times [2019-11-06 18:52:55,253 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:55,253 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192364306] [2019-11-06 18:52:55,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:52:55,497 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192364306] [2019-11-06 18:52:55,497 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48317671] [2019-11-06 18:52:55,498 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 18:52:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:55,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:52:55,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:55,571 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 18:52:55,571 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:55,581 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:55,582 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 18:52:55,582 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2019-11-06 18:52:55,597 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-11-06 18:52:55,598 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 18:52:55,598 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:55,603 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:55,603 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 18:52:55,604 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:10 [2019-11-06 18:52:55,613 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 18:52:55,613 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:55,615 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:55,616 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 18:52:55,616 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:4 [2019-11-06 18:52:55,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:52:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:52:55,649 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:55,649 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-11-06 18:52:55,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114187493] [2019-11-06 18:52:55,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:52:55,650 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:55,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:52:55,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:52:55,651 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 13 states. [2019-11-06 18:52:56,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:52:56,055 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2019-11-06 18:52:56,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:52:56,055 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2019-11-06 18:52:56,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:52:56,058 INFO L225 Difference]: With dead ends: 84 [2019-11-06 18:52:56,058 INFO L226 Difference]: Without dead ends: 82 [2019-11-06 18:52:56,058 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 2 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 18:52:56,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-06 18:52:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2019-11-06 18:52:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 18:52:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2019-11-06 18:52:56,073 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 43 [2019-11-06 18:52:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:52:56,073 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2019-11-06 18:52:56,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:52:56,073 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2019-11-06 18:52:56,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:52:56,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:52:56,075 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-06 18:52:56,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:52:56,278 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:52:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:52:56,279 INFO L82 PathProgramCache]: Analyzing trace with hash -779374823, now seen corresponding path program 1 times [2019-11-06 18:52:56,279 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:52:56,280 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227812838] [2019-11-06 18:52:56,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:52:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:52:56,488 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227812838] [2019-11-06 18:52:56,488 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171079927] [2019-11-06 18:52:56,488 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 18:52:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:52:56,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:52:56,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:52:56,616 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 18:52:56,616 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:56,624 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:56,625 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 18:52:56,626 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2019-11-06 18:52:56,697 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-11-06 18:52:56,697 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 18:52:56,698 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:56,703 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:56,704 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 18:52:56,704 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2019-11-06 18:52:56,795 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 18:52:56,796 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:52:56,800 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:52:56,800 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 18:52:56,800 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2019-11-06 18:52:56,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:52:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:52:56,851 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:52:56,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-11-06 18:52:56,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195564424] [2019-11-06 18:52:56,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:52:56,853 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:52:56,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:52:56,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:52:56,853 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand 21 states. [2019-11-06 18:53:08,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:08,256 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2019-11-06 18:53:08,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:53:08,256 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2019-11-06 18:53:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:08,258 INFO L225 Difference]: With dead ends: 172 [2019-11-06 18:53:08,258 INFO L226 Difference]: Without dead ends: 170 [2019-11-06 18:53:08,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=277, Invalid=1442, Unknown=3, NotChecked=0, Total=1722 [2019-11-06 18:53:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-06 18:53:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 48. [2019-11-06 18:53:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:53:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2019-11-06 18:53:08,288 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 43 [2019-11-06 18:53:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:08,289 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2019-11-06 18:53:08,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:53:08,289 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2019-11-06 18:53:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:53:08,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:08,290 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-06 18:53:08,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:08,492 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:08,492 INFO L82 PathProgramCache]: Analyzing trace with hash -362851840, now seen corresponding path program 2 times [2019-11-06 18:53:08,493 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:08,493 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220559165] [2019-11-06 18:53:08,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:53:08,626 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220559165] [2019-11-06 18:53:08,626 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183927345] [2019-11-06 18:53:08,626 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 18:53:08,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:53:08,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:08,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:53:08,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:08,765 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 13 treesize of output 9 [2019-11-06 18:53:08,766 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:08,777 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:08,778 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 18:53:08,778 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2019-11-06 18:53:08,996 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 18:53:08,996 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:09,000 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:09,001 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 18:53:09,001 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:8 [2019-11-06 18:53:09,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:53:09,071 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:09,071 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-11-06 18:53:09,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340421548] [2019-11-06 18:53:09,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:53:09,072 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:09,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:53:09,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:53:09,073 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 22 states. [2019-11-06 18:53:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:36,424 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2019-11-06 18:53:36,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:53:36,424 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2019-11-06 18:53:36,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:36,427 INFO L225 Difference]: With dead ends: 147 [2019-11-06 18:53:36,427 INFO L226 Difference]: Without dead ends: 145 [2019-11-06 18:53:36,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:53:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-06 18:53:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2019-11-06 18:53:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:53:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2019-11-06 18:53:36,447 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 51 [2019-11-06 18:53:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:36,447 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2019-11-06 18:53:36,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:53:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2019-11-06 18:53:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:53:36,449 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:36,449 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-06 18:53:36,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:36,653 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash -222303230, now seen corresponding path program 1 times [2019-11-06 18:53:36,654 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:36,655 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005757922] [2019-11-06 18:53:36,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:53:36,875 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005757922] [2019-11-06 18:53:36,876 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217468048] [2019-11-06 18:53:36,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:36,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:53:36,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:37,025 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 13 treesize of output 9 [2019-11-06 18:53:37,025 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:37,032 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:37,032 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 18:53:37,032 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2019-11-06 18:53:37,218 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 18:53:37,218 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:37,221 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:37,222 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 18:53:37,222 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2019-11-06 18:53:37,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:53:37,281 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:37,282 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-11-06 18:53:37,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429159142] [2019-11-06 18:53:37,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-06 18:53:37,283 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:37,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-06 18:53:37,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:53:37,283 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 23 states.