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/rewrev.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:50:42,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:50:42,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:50:42,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:50:42,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:50:42,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:50:42,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:50:42,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:50:42,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:50:42,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:50:42,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:50:42,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:50:42,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:50:42,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:50:42,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:50:42,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:50:42,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:50:42,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:50:42,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:50:42,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:50:42,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:50:42,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:50:42,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:50:42,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:50:42,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:50:42,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:50:42,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:50:42,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:50:42,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:50:42,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:50:42,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:50:42,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:50:42,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:50:42,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:50:42,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:50:42,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:50:42,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:50:42,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:50:42,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:50:42,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:50:42,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:50:42,626 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 [2019-10-14 21:50:42,642 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:50:42,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:50:42,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:50:42,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:50:42,644 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:50:42,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:50:42,644 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:50:42,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:50:42,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:50:42,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:50:42,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:50:42,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:50:42,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:50:42,645 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:50:42,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:50:42,646 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:50:42,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:50:42,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:50:42,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:50:42,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:50:42,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:50:42,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:50:42,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:50:42,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:50:42,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:50:42,648 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:50:42,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:50:42,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:50:42,648 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:50:42,961 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:50:42,982 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:50:42,986 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:50:42,987 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:50:42,988 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:50:42,988 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rewrev.c [2019-10-14 21:50:43,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c06c60dff/fbda3873c85246dd8ab8dd74cc1e96f4/FLAGaee55a6cc [2019-10-14 21:50:43,495 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:50:43,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewrev.c [2019-10-14 21:50:43,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c06c60dff/fbda3873c85246dd8ab8dd74cc1e96f4/FLAGaee55a6cc [2019-10-14 21:50:43,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c06c60dff/fbda3873c85246dd8ab8dd74cc1e96f4 [2019-10-14 21:50:43,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:50:43,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:50:43,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:50:43,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:50:43,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:50:43,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:50:43" (1/1) ... [2019-10-14 21:50:43,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b67f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:43, skipping insertion in model container [2019-10-14 21:50:43,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:50:43" (1/1) ... [2019-10-14 21:50:43,863 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:50:43,887 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:50:44,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:50:44,164 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:50:44,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:50:44,210 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:50:44,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:44 WrapperNode [2019-10-14 21:50:44,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:50:44,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:50:44,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:50:44,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:50:44,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:44" (1/1) ... [2019-10-14 21:50:44,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:44" (1/1) ... [2019-10-14 21:50:44,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:44" (1/1) ... [2019-10-14 21:50:44,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:44" (1/1) ... [2019-10-14 21:50:44,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:44" (1/1) ... [2019-10-14 21:50:44,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:44" (1/1) ... [2019-10-14 21:50:44,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:44" (1/1) ... [2019-10-14 21:50:44,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:50:44,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:50:44,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:50:44,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:50:44,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:44" (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 [2019-10-14 21:50:44,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:50:44,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:50:44,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:50:44,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:50:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:50:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:50:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:50:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:50:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:50:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:50:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:50:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:50:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:50:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:50:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:50:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:50:44,708 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:50:44,709 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 21:50:44,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:50:44 BoogieIcfgContainer [2019-10-14 21:50:44,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:50:44,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:50:44,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:50:44,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:50:44,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:50:43" (1/3) ... [2019-10-14 21:50:44,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8b94e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:50:44, skipping insertion in model container [2019-10-14 21:50:44,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:44" (2/3) ... [2019-10-14 21:50:44,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8b94e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:50:44, skipping insertion in model container [2019-10-14 21:50:44,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:50:44" (3/3) ... [2019-10-14 21:50:44,718 INFO L109 eAbstractionObserver]: Analyzing ICFG rewrev.c [2019-10-14 21:50:44,729 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:50:44,736 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:50:44,747 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:50:44,772 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:50:44,772 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:50:44,772 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:50:44,772 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:50:44,772 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:50:44,772 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:50:44,772 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:50:44,773 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:50:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-14 21:50:44,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:50:44,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:44,794 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:44,796 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:44,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:44,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1294486485, now seen corresponding path program 1 times [2019-10-14 21:50:44,810 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:44,810 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674026067] [2019-10-14 21:50:44,811 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:44,811 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:44,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:44,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674026067] [2019-10-14 21:50:44,997 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:50:44,998 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:50:44,998 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720271952] [2019-10-14 21:50:45,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:50:45,003 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:45,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:50:45,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:50:45,020 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-10-14 21:50:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:45,135 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-10-14 21:50:45,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:50:45,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 21:50:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:45,145 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:50:45,146 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 21:50:45,149 INFO L600 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 [2019-10-14 21:50:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 21:50:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 21:50:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 21:50:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-14 21:50:45,190 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-10-14 21:50:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:45,191 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-14 21:50:45,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:50:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-14 21:50:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:50:45,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:45,193 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:45,193 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:45,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1653126776, now seen corresponding path program 1 times [2019-10-14 21:50:45,194 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:45,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415782120] [2019-10-14 21:50:45,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:45,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:45,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:45,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415782120] [2019-10-14 21:50:45,315 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:50:45,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:50:45,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409257502] [2019-10-14 21:50:45,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:50:45,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:45,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:50:45,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:50:45,319 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2019-10-14 21:50:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:45,410 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2019-10-14 21:50:45,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:50:45,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 21:50:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:45,412 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:50:45,412 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:50:45,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:50:45,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:50:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-14 21:50:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:50:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 21:50:45,421 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-14 21:50:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:45,422 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 21:50:45,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:50:45,422 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 21:50:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:50:45,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:45,423 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:45,424 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:45,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1007604157, now seen corresponding path program 1 times [2019-10-14 21:50:45,424 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:45,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487241671] [2019-10-14 21:50:45,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:45,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:45,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:45,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487241671] [2019-10-14 21:50:45,503 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:50:45,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:50:45,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498828485] [2019-10-14 21:50:45,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:50:45,505 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:45,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:50:45,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:50:45,505 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2019-10-14 21:50:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:45,588 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-10-14 21:50:45,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:50:45,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-14 21:50:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:45,590 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:50:45,590 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:50:45,591 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:50:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:50:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 21:50:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:50:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-14 21:50:45,598 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2019-10-14 21:50:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:45,598 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-14 21:50:45,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:50:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-14 21:50:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:50:45,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:45,600 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:45,600 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:45,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2051596356, now seen corresponding path program 1 times [2019-10-14 21:50:45,601 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:45,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792239622] [2019-10-14 21:50:45,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:45,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:45,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:46,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792239622] [2019-10-14 21:50:46,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996243345] [2019-10-14 21:50:46,086 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 [2019-10-14 21:50:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:46,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:50:46,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:46,293 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 [2019-10-14 21:50:46,294 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:46,312 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:46,314 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:50:46,315 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:24 [2019-10-14 21:50:46,417 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:46,418 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2019-10-14 21:50:46,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:46,423 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-14 21:50:46,442 INFO L567 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2019-10-14 21:50:46,444 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:46,444 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:31, output treesize:7 [2019-10-14 21:50:46,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:50:46,517 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:50:46,518 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2019-10-14 21:50:46,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014223330] [2019-10-14 21:50:46,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:50:46,519 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:46,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:50:46,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:50:46,520 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 21 states. [2019-10-14 21:50:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:47,259 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-10-14 21:50:47,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:50:47,261 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2019-10-14 21:50:47,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:47,263 INFO L225 Difference]: With dead ends: 39 [2019-10-14 21:50:47,263 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:50:47,267 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:50:47,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:50:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2019-10-14 21:50:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:50:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-10-14 21:50:47,285 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2019-10-14 21:50:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:47,286 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-10-14 21:50:47,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:50:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-10-14 21:50:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:50:47,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:47,288 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] [2019-10-14 21:50:47,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:47,490 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:47,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:47,491 INFO L82 PathProgramCache]: Analyzing trace with hash -730987952, now seen corresponding path program 1 times [2019-10-14 21:50:47,491 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:47,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961406835] [2019-10-14 21:50:47,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:47,493 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:47,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:47,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961406835] [2019-10-14 21:50:47,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768547129] [2019-10-14 21:50:47,898 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 [2019-10-14 21:50:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:47,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:50:47,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:47,998 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 [2019-10-14 21:50:47,999 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:48,008 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:48,008 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:48,009 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-10-14 21:50:48,123 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-10-14 21:50:48,125 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 38 treesize of output 28 [2019-10-14 21:50:48,126 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:48,139 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:48,142 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-14 21:50:48,143 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2019-10-14 21:50:48,479 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:48,479 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 58 [2019-10-14 21:50:48,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:48,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:48,482 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-14 21:50:48,502 INFO L567 ElimStorePlain]: treesize reduction 28, result has 39.1 percent of original size [2019-10-14 21:50:48,503 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:48,503 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:57, output treesize:7 [2019-10-14 21:50:48,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:48,580 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:50:48,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2019-10-14 21:50:48,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946248412] [2019-10-14 21:50:48,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:50:48,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:48,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:50:48,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:50:48,582 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 28 states. [2019-10-14 21:51:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:04,215 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2019-10-14 21:51:04,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:51:04,217 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2019-10-14 21:51:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:04,221 INFO L225 Difference]: With dead ends: 75 [2019-10-14 21:51:04,221 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:51:04,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2019-10-14 21:51:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:51:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2019-10-14 21:51:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:51:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-14 21:51:04,239 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 30 [2019-10-14 21:51:04,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:04,239 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-14 21:51:04,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:51:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-14 21:51:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:51:04,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:04,241 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:04,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:04,450 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:04,450 INFO L82 PathProgramCache]: Analyzing trace with hash 783487204, now seen corresponding path program 2 times [2019-10-14 21:51:04,450 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:04,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436252157] [2019-10-14 21:51:04,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:04,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:04,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:51:04,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436252157] [2019-10-14 21:51:04,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532178826] [2019-10-14 21:51:04,542 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 [2019-10-14 21:51:04,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:51:04,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:51:04,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:51:04,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:51:04,647 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:04,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2019-10-14 21:51:04,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671946205] [2019-10-14 21:51:04,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:51:04,648 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:04,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:51:04,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:51:04,649 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 12 states. [2019-10-14 21:51:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:04,854 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2019-10-14 21:51:04,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:51:04,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2019-10-14 21:51:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:04,858 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:51:04,858 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:51:04,859 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:51:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:51:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-14 21:51:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:51:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-10-14 21:51:04,879 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2019-10-14 21:51:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:04,879 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-10-14 21:51:04,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:51:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-10-14 21:51:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:51:04,882 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:04,882 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:05,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:05,083 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:05,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1309226143, now seen corresponding path program 3 times [2019-10-14 21:51:05,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:05,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743912256] [2019-10-14 21:51:05,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:05,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:05,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:51:05,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743912256] [2019-10-14 21:51:05,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036276971] [2019-10-14 21:51:05,398 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:05,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:51:05,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:51:05,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 21:51:05,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:05,502 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 [2019-10-14 21:51:05,503 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:05,510 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:05,510 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:05,510 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-10-14 21:51:05,581 INFO L341 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-10-14 21:51:05,582 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 28 treesize of output 27 [2019-10-14 21:51:05,582 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:05,592 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:05,592 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:05,592 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:22 [2019-10-14 21:51:05,616 INFO L341 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2019-10-14 21:51:05,625 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 [2019-10-14 21:51:05,626 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:05,638 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:05,639 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:05,639 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2019-10-14 21:51:05,847 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:05,849 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:05,851 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:05,852 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:05,853 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 43 [2019-10-14 21:51:05,854 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:05,868 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:05,869 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:51:05,869 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:69 [2019-10-14 21:51:06,413 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:06,414 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:06,415 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:06,416 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:06,418 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:51:06,421 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:06,421 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 16 [2019-10-14 21:51:06,422 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:06,429 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:06,430 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:06,430 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:7 [2019-10-14 21:51:06,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:51:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:51:06,534 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:06,534 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2019-10-14 21:51:06,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023697780] [2019-10-14 21:51:06,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:51:06,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:06,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:51:06,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:51:06,536 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 33 states. [2019-10-14 21:51:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:14,903 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2019-10-14 21:51:14,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:51:14,903 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2019-10-14 21:51:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:14,905 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:51:14,905 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:51:14,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=394, Invalid=2468, Unknown=0, NotChecked=0, Total=2862 [2019-10-14 21:51:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:51:14,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2019-10-14 21:51:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:51:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-10-14 21:51:14,918 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 42 [2019-10-14 21:51:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:14,918 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-10-14 21:51:14,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 21:51:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-10-14 21:51:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:51:14,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:14,920 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:15,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:15,124 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:15,125 INFO L82 PathProgramCache]: Analyzing trace with hash -65371085, now seen corresponding path program 4 times [2019-10-14 21:51:15,125 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:15,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232288478] [2019-10-14 21:51:15,126 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:15,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:15,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:51:15,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232288478] [2019-10-14 21:51:15,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599678613] [2019-10-14 21:51:15,255 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:15,309 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:51:15,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:51:15,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:51:15,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:51:15,380 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:15,381 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2019-10-14 21:51:15,381 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412674754] [2019-10-14 21:51:15,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:51:15,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:15,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:51:15,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:51:15,382 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 14 states. [2019-10-14 21:51:15,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:15,627 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2019-10-14 21:51:15,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:51:15,628 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2019-10-14 21:51:15,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:15,629 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:51:15,629 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:51:15,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:51:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:51:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 21:51:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:51:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-10-14 21:51:15,650 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 50 [2019-10-14 21:51:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:15,651 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-10-14 21:51:15,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:51:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-10-14 21:51:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:51:15,652 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:15,653 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:15,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:15,859 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash -301340818, now seen corresponding path program 5 times [2019-10-14 21:51:15,860 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:15,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123718750] [2019-10-14 21:51:15,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:15,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:15,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:51:16,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123718750] [2019-10-14 21:51:16,614 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813130915] [2019-10-14 21:51:16,614 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:16,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 21:51:16,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:51:16,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 21:51:16,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:16,724 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 [2019-10-14 21:51:16,725 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:16,733 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:16,733 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:16,734 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-10-14 21:51:16,797 INFO L341 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-10-14 21:51:16,798 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 28 treesize of output 27 [2019-10-14 21:51:16,798 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:16,807 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:16,807 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:16,807 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2019-10-14 21:51:16,867 INFO L341 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2019-10-14 21:51:16,868 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2019-10-14 21:51:16,869 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:16,880 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:16,880 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:16,881 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2019-10-14 21:51:16,996 INFO L341 Elim1Store]: treesize reduction 171, result has 17.8 percent of original size [2019-10-14 21:51:16,996 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 54 [2019-10-14 21:51:16,997 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:17,009 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:17,010 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:17,010 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2019-10-14 21:51:17,098 INFO L341 Elim1Store]: treesize reduction 225, result has 13.8 percent of original size [2019-10-14 21:51:17,099 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 57 [2019-10-14 21:51:17,099 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:17,110 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:17,111 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:17,111 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:46 [2019-10-14 21:51:17,313 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:17,314 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:17,315 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:17,317 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:17,318 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:17,318 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:17,320 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:17,320 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 58 [2019-10-14 21:51:17,321 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:17,339 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:17,340 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:51:17,340 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:94, output treesize:90 [2019-10-14 21:51:18,095 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:18,101 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:18,102 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:18,103 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:18,104 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:18,105 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:18,106 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:18,107 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:18,108 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:51:18,109 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:51:18,110 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:18,111 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 19 [2019-10-14 21:51:18,111 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:18,118 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:18,118 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:18,118 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:87, output treesize:7 [2019-10-14 21:51:18,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:51:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:51:18,246 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:18,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24] total 41 [2019-10-14 21:51:18,246 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739194208] [2019-10-14 21:51:18,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-14 21:51:18,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:18,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-14 21:51:18,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 21:51:18,248 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 41 states. [2019-10-14 21:51:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:30,706 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2019-10-14 21:51:30,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 21:51:30,707 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 54 [2019-10-14 21:51:30,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:30,708 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:51:30,708 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:51:30,710 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=640, Invalid=4052, Unknown=0, NotChecked=0, Total=4692 [2019-10-14 21:51:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:51:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2019-10-14 21:51:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:51:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-10-14 21:51:30,722 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 54 [2019-10-14 21:51:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:30,723 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-10-14 21:51:30,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-14 21:51:30,723 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-10-14 21:51:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 21:51:30,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:30,724 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:30,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:30,929 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash 345962498, now seen corresponding path program 6 times [2019-10-14 21:51:30,930 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:30,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784179175] [2019-10-14 21:51:30,930 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:30,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:30,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:51:31,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784179175] [2019-10-14 21:51:31,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434921884] [2019-10-14 21:51:31,040 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:31,109 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:51:31,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:51:31,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:51:31,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:51:31,185 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:31,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2019-10-14 21:51:31,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427245160] [2019-10-14 21:51:31,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:51:31,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:31,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:51:31,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:51:31,186 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 16 states. [2019-10-14 21:51:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:31,519 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2019-10-14 21:51:31,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:51:31,519 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2019-10-14 21:51:31,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:31,521 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:51:31,521 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:51:31,523 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:51:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:51:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-14 21:51:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 21:51:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2019-10-14 21:51:31,548 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 62 [2019-10-14 21:51:31,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:31,549 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2019-10-14 21:51:31,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:51:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2019-10-14 21:51:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:51:31,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:31,558 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:31,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:31,759 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:31,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:31,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1002724029, now seen corresponding path program 7 times [2019-10-14 21:51:31,760 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:31,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097813314] [2019-10-14 21:51:31,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:31,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:31,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat