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/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:16:45,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:16:45,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:16:45,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:16:45,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:16:45,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:16:45,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:16:45,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:16:45,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:16:45,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:16:45,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:16:45,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:16:45,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:16:45,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:16:45,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:16:45,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:16:45,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:16:45,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:16:45,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:16:45,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:16:45,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:16:45,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:16:45,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:16:45,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:16:45,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:16:45,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:16:45,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:16:45,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:16:45,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:16:45,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:16:45,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:16:45,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:16:45,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:16:45,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:16:45,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:16:45,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:16:45,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:16:45,816 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:16:45,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:16:45,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:16:45,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:16:45,819 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:16:45,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:16:45,819 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:16:45,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:16:45,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:16:45,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:16:45,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:16:45,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:16:45,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:16:45,822 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:16:45,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:16:45,822 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:16:45,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:16:45,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:16:45,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:16:45,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:16:45,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:16:45,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:16:45,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:16:45,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:16:45,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:16:45,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:16:45,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:16:45,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:16:45,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:16:46,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:16:46,180 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:16:46,184 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:16:46,185 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:16:46,186 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:16:46,186 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2019-10-13 19:16:46,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bbd10cbb/8a6167b7e37e4460b777a7a85ac5dfa5/FLAGb9392f86a [2019-10-13 19:16:46,702 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:16:46,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2019-10-13 19:16:46,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bbd10cbb/8a6167b7e37e4460b777a7a85ac5dfa5/FLAGb9392f86a [2019-10-13 19:16:47,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bbd10cbb/8a6167b7e37e4460b777a7a85ac5dfa5 [2019-10-13 19:16:47,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:16:47,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:16:47,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:47,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:16:47,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:16:47,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:47" (1/1) ... [2019-10-13 19:16:47,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e3483a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:47, skipping insertion in model container [2019-10-13 19:16:47,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:47" (1/1) ... [2019-10-13 19:16:47,163 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:16:47,181 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:16:47,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:47,430 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:16:47,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:47,469 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:16:47,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:47 WrapperNode [2019-10-13 19:16:47,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:47,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:16:47,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:16:47,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:16:47,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:47" (1/1) ... [2019-10-13 19:16:47,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:47" (1/1) ... [2019-10-13 19:16:47,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:47" (1/1) ... [2019-10-13 19:16:47,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:47" (1/1) ... [2019-10-13 19:16:47,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:47" (1/1) ... [2019-10-13 19:16:47,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:47" (1/1) ... [2019-10-13 19:16:47,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:47" (1/1) ... [2019-10-13 19:16:47,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:16:47,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:16:47,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:16:47,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:16:47,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:16:47,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:16:47,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:16:47,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:16:47,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:16:47,686 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 19:16:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:16:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:16:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:16:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:16:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:16:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 19:16:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:16:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:16:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:16:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:16:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:16:47,962 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:16:47,963 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 19:16:47,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:47 BoogieIcfgContainer [2019-10-13 19:16:47,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:16:47,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:16:47,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:16:47,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:16:47,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:16:47" (1/3) ... [2019-10-13 19:16:47,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c326f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:47, skipping insertion in model container [2019-10-13 19:16:47,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:47" (2/3) ... [2019-10-13 19:16:47,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c326f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:47, skipping insertion in model container [2019-10-13 19:16:47,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:47" (3/3) ... [2019-10-13 19:16:47,971 INFO L109 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2019-10-13 19:16:47,978 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:16:47,984 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:16:47,994 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:16:48,017 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:16:48,017 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:16:48,017 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:16:48,018 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:16:48,018 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:16:48,018 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:16:48,018 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:16:48,018 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:16:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-13 19:16:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:16:48,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:48,042 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:48,043 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:48,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1448943433, now seen corresponding path program 1 times [2019-10-13 19:16:48,054 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:48,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158437061] [2019-10-13 19:16:48,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:48,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:48,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:48,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158437061] [2019-10-13 19:16:48,212 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:16:48,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:16:48,213 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248455328] [2019-10-13 19:16:48,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:16:48,217 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:48,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:16:48,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:16:48,230 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-10-13 19:16:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:48,330 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-13 19:16:48,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:16:48,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-13 19:16:48,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:48,340 INFO L225 Difference]: With dead ends: 43 [2019-10-13 19:16:48,340 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 19:16:48,343 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 [2019-10-13 19:16:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 19:16:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 19:16:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 19:16:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-13 19:16:48,380 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2019-10-13 19:16:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:48,380 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-13 19:16:48,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:16:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-13 19:16:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:16:48,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:48,382 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:48,382 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:48,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:48,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1815969073, now seen corresponding path program 1 times [2019-10-13 19:16:48,383 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:48,384 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605480167] [2019-10-13 19:16:48,384 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:48,384 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:48,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:48,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605480167] [2019-10-13 19:16:48,507 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:16:48,507 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:16:48,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367870787] [2019-10-13 19:16:48,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:16:48,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:48,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:16:48,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:16:48,510 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2019-10-13 19:16:48,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:48,633 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-10-13 19:16:48,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:16:48,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-10-13 19:16:48,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:48,635 INFO L225 Difference]: With dead ends: 34 [2019-10-13 19:16:48,635 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 19:16:48,636 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:16:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 19:16:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-10-13 19:16:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 19:16:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-13 19:16:48,643 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2019-10-13 19:16:48,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:48,644 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-13 19:16:48,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:16:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-13 19:16:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:16:48,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:48,646 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:48,646 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:48,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1419508495, now seen corresponding path program 1 times [2019-10-13 19:16:48,647 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:48,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23986901] [2019-10-13 19:16:48,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:48,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:48,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:48,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23986901] [2019-10-13 19:16:48,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051089809] [2019-10-13 19:16:48,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:49,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:16:49,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:49,153 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-13 19:16:49,154 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:16:49,157 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:16:49,158 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:16:49,159 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-10-13 19:16:49,210 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-13 19:16:49,210 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:16:49,213 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:16:49,213 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:16:49,214 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-13 19:16:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:49,253 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:49,254 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2019-10-13 19:16:49,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840925187] [2019-10-13 19:16:49,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 19:16:49,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:49,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 19:16:49,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:16:49,257 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 16 states. [2019-10-13 19:16:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:49,653 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-10-13 19:16:49,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:16:49,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2019-10-13 19:16:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:49,658 INFO L225 Difference]: With dead ends: 43 [2019-10-13 19:16:49,658 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 19:16:49,661 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:16:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 19:16:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2019-10-13 19:16:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 19:16:49,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-10-13 19:16:49,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2019-10-13 19:16:49,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:49,695 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-10-13 19:16:49,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 19:16:49,695 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-10-13 19:16:49,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 19:16:49,696 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:49,696 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:49,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:49,902 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash 764545094, now seen corresponding path program 1 times [2019-10-13 19:16:49,902 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:49,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8375366] [2019-10-13 19:16:49,903 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:49,903 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:49,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:50,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8375366] [2019-10-13 19:16:50,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009263964] [2019-10-13 19:16:50,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:50,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 19:16:50,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:50,191 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:50,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2019-10-13 19:16:50,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643726738] [2019-10-13 19:16:50,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:16:50,192 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:50,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:16:50,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:16:50,193 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2019-10-13 19:16:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:50,321 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2019-10-13 19:16:50,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:16:50,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-10-13 19:16:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:50,327 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:16:50,327 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 19:16:50,328 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:16:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 19:16:50,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-13 19:16:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 19:16:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-13 19:16:50,342 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2019-10-13 19:16:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:50,343 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-13 19:16:50,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:16:50,348 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-13 19:16:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 19:16:50,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:50,349 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:50,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:50,550 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:50,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:50,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2113189724, now seen corresponding path program 2 times [2019-10-13 19:16:50,551 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:50,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251251476] [2019-10-13 19:16:50,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:50,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:50,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:50,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251251476] [2019-10-13 19:16:50,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897113908] [2019-10-13 19:16:50,772 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:50,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:16:50,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:50,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 19:16:50,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:50,866 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-13 19:16:50,867 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:16:50,871 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:16:50,872 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:16:50,872 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-13 19:16:51,021 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-13 19:16:51,021 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:16:51,023 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:16:51,023 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:16:51,024 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 19:16:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:51,081 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:51,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2019-10-13 19:16:51,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299145914] [2019-10-13 19:16:51,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:16:51,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:51,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:16:51,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:16:51,083 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 20 states. [2019-10-13 19:16:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:51,486 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-10-13 19:16:51,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:16:51,486 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2019-10-13 19:16:51,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:51,487 INFO L225 Difference]: With dead ends: 42 [2019-10-13 19:16:51,488 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 19:16:51,488 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2019-10-13 19:16:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 19:16:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-10-13 19:16:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 19:16:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-10-13 19:16:51,496 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 26 [2019-10-13 19:16:51,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:51,496 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-10-13 19:16:51,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:16:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-10-13 19:16:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 19:16:51,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:51,498 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:51,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:51,703 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:51,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:51,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1564012763, now seen corresponding path program 3 times [2019-10-13 19:16:51,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:51,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606131473] [2019-10-13 19:16:51,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:51,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:51,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:16:51,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606131473] [2019-10-13 19:16:51,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391626656] [2019-10-13 19:16:51,807 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 [2019-10-13 19:16:51,846 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:16:51,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:51,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 19:16:51,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:16:51,925 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:51,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 19:16:51,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955670642] [2019-10-13 19:16:51,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:16:51,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:51,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:16:51,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:16:51,929 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2019-10-13 19:16:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:52,085 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2019-10-13 19:16:52,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:16:52,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-10-13 19:16:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:52,087 INFO L225 Difference]: With dead ends: 60 [2019-10-13 19:16:52,087 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 19:16:52,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:16:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 19:16:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-10-13 19:16:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 19:16:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-10-13 19:16:52,096 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2019-10-13 19:16:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:52,096 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-10-13 19:16:52,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:16:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-10-13 19:16:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 19:16:52,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:52,098 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:52,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:52,302 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:52,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:52,302 INFO L82 PathProgramCache]: Analyzing trace with hash 119264185, now seen corresponding path program 4 times [2019-10-13 19:16:52,303 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:52,303 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930794364] [2019-10-13 19:16:52,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:16:52,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930794364] [2019-10-13 19:16:52,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975736292] [2019-10-13 19:16:52,503 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 [2019-10-13 19:16:52,551 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:16:52,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:52,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 19:16:52,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:52,633 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 15 treesize of output 11 [2019-10-13 19:16:52,633 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:16:52,640 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:16:52,640 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:16:52,641 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-10-13 19:16:53,028 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 19:16:53,030 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:16:53,031 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 19 treesize of output 10 [2019-10-13 19:16:53,031 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:16:53,038 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:16:53,039 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:16:53,040 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2019-10-13 19:16:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:16:53,080 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:53,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2019-10-13 19:16:53,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414663366] [2019-10-13 19:16:53,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 19:16:53,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:53,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 19:16:53,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-10-13 19:16:53,082 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 26 states. [2019-10-13 19:16:56,130 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2019-10-13 19:16:58,182 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2019-10-13 19:17:00,220 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 28 [2019-10-13 19:17:00,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:00,305 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2019-10-13 19:17:00,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 19:17:00,306 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 36 [2019-10-13 19:17:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:00,308 INFO L225 Difference]: With dead ends: 68 [2019-10-13 19:17:00,308 INFO L226 Difference]: Without dead ends: 52 [2019-10-13 19:17:00,310 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2019-10-13 19:17:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-13 19:17:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-13 19:17:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 19:17:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-10-13 19:17:00,320 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 36 [2019-10-13 19:17:00,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:00,321 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-10-13 19:17:00,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 19:17:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-10-13 19:17:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:17:00,322 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:00,322 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:00,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:00,523 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:00,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:00,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1605303374, now seen corresponding path program 5 times [2019-10-13 19:17:00,524 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:00,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262717558] [2019-10-13 19:17:00,524 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:00,524 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:00,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 19:17:00,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262717558] [2019-10-13 19:17:00,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72555908] [2019-10-13 19:17:00,766 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 [2019-10-13 19:17:00,830 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-13 19:17:00,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:00,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 19:17:00,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:00,938 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-13 19:17:00,939 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:17:00,943 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:17:00,943 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:17:00,944 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-13 19:17:01,237 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-13 19:17:01,237 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:17:01,238 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:17:01,239 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:17:01,239 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 19:17:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 19:17:01,279 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:01,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2019-10-13 19:17:01,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100982481] [2019-10-13 19:17:01,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 19:17:01,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:01,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 19:17:01,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:17:01,282 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 28 states. [2019-10-13 19:17:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:01,926 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2019-10-13 19:17:01,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 19:17:01,927 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2019-10-13 19:17:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:01,929 INFO L225 Difference]: With dead ends: 62 [2019-10-13 19:17:01,929 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 19:17:01,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 19:17:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 19:17:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-10-13 19:17:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 19:17:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-10-13 19:17:01,939 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 46 [2019-10-13 19:17:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:01,940 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-10-13 19:17:01,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 19:17:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-10-13 19:17:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 19:17:01,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:01,941 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:02,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:02,146 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:02,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:02,146 INFO L82 PathProgramCache]: Analyzing trace with hash 921393797, now seen corresponding path program 6 times [2019-10-13 19:17:02,147 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:02,147 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065261687] [2019-10-13 19:17:02,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:02,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:02,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 19:17:02,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065261687] [2019-10-13 19:17:02,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068217085] [2019-10-13 19:17:02,286 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 [2019-10-13 19:17:02,342 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-13 19:17:02,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:02,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 19:17:02,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 19:17:02,452 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:02,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2019-10-13 19:17:02,452 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154973182] [2019-10-13 19:17:02,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:17:02,453 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:02,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:17:02,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:17:02,454 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2019-10-13 19:17:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:02,663 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2019-10-13 19:17:02,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:17:02,663 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2019-10-13 19:17:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:02,665 INFO L225 Difference]: With dead ends: 88 [2019-10-13 19:17:02,665 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 19:17:02,666 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2019-10-13 19:17:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 19:17:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-13 19:17:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-13 19:17:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-10-13 19:17:02,675 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2019-10-13 19:17:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:02,676 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-10-13 19:17:02,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:17:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-10-13 19:17:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 19:17:02,677 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:02,677 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:02,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:02,881 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash 288236131, now seen corresponding path program 7 times [2019-10-13 19:17:02,882 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:02,882 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800391131] [2019-10-13 19:17:02,882 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:02,882 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:02,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 19:17:03,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800391131] [2019-10-13 19:17:03,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43757325] [2019-10-13 19:17:03,123 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:03,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 19:17:03,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:03,224 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 15 treesize of output 11 [2019-10-13 19:17:03,224 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:17:03,230 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:17:03,231 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. [2019-10-13 19:17:03,231 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-10-13 19:17:34,395 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-10-13 19:17:34,395 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:17:34,396 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:17:34,397 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:17:34,397 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2019-10-13 19:17:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 19:17:34,438 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:34,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 25 [2019-10-13 19:17:34,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695909835] [2019-10-13 19:17:34,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 19:17:34,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:34,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 19:17:34,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=529, Unknown=4, NotChecked=0, Total=600 [2019-10-13 19:17:34,440 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 25 states.