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-examples/standard_reverse_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:46:04,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:46:04,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:46:04,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:46:04,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:46:04,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:46:04,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:46:04,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:46:04,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:46:04,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:46:04,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:46:04,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:46:04,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:46:04,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:46:04,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:46:04,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:46:04,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:46:04,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:46:04,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:46:04,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:46:04,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:46:04,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:46:04,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:46:04,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:46:04,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:46:04,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:46:04,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:46:04,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:46:04,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:46:04,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:46:04,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:46:04,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:46:04,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:46:04,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:46:04,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:46:04,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:46:04,205 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 21:46:04,218 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:46:04,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:46:04,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:46:04,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:46:04,220 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:46:04,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:46:04,221 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:46:04,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:46:04,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:46:04,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:46:04,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:46:04,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:46:04,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:46:04,222 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:46:04,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:46:04,223 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:46:04,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:46:04,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:46:04,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:46:04,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:46:04,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:46:04,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:04,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:46:04,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:46:04,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:46:04,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:46:04,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:46:04,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:46:04,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:04,542 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:04,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:04,571 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:04,573 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:04,574 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:04,574 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2019-10-14 21:46:04,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ead26ba0/3cbde78392b14bf484921c99127bdfc9/FLAGdf730fa67 [2019-10-14 21:46:05,189 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:05,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2019-10-14 21:46:05,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ead26ba0/3cbde78392b14bf484921c99127bdfc9/FLAGdf730fa67 [2019-10-14 21:46:05,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ead26ba0/3cbde78392b14bf484921c99127bdfc9 [2019-10-14 21:46:05,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:05,555 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:05,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:05,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:05,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:05,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@284d3eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05, skipping insertion in model container [2019-10-14 21:46:05,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,574 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:05,594 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:05,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:05,785 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:05,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:05,826 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:05,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05 WrapperNode [2019-10-14 21:46:05,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:05,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:05,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:05,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:05,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:05,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:05,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:05,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:05,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (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 21:46:06,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:06,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:06,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:06,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:06,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:06,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:06,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:06,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:06,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:06,269 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:06,270 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:46:06,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:06 BoogieIcfgContainer [2019-10-14 21:46:06,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:06,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:06,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:06,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:06,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:05" (1/3) ... [2019-10-14 21:46:06,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd8a705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:06, skipping insertion in model container [2019-10-14 21:46:06,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (2/3) ... [2019-10-14 21:46:06,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd8a705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:06, skipping insertion in model container [2019-10-14 21:46:06,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:06" (3/3) ... [2019-10-14 21:46:06,296 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2019-10-14 21:46:06,310 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:06,320 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:06,347 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:06,378 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:06,378 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:06,378 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:06,378 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:06,379 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:06,379 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:06,379 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:06,381 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-14 21:46:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:06,420 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,421 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,422 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2019-10-14 21:46:06,439 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917002732] [2019-10-14 21:46:06,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,591 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 21:46:06,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917002732] [2019-10-14 21:46:06,593 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:06,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:06,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533422856] [2019-10-14 21:46:06,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:06,598 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:06,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:06,613 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-10-14 21:46:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,725 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-10-14 21:46:06,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:06,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:46:06,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,735 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:46:06,735 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 21:46:06,738 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 21:46:06,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 21:46:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 21:46:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 21:46:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-14 21:46:06,774 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2019-10-14 21:46:06,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,775 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-14 21:46:06,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:06,775 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-14 21:46:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:06,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,777 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,777 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,778 INFO L82 PathProgramCache]: Analyzing trace with hash -262172122, now seen corresponding path program 1 times [2019-10-14 21:46:06,778 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,778 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829894676] [2019-10-14 21:46:06,779 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,779 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,873 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 21:46:06,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829894676] [2019-10-14 21:46:06,874 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:06,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:06,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009259041] [2019-10-14 21:46:06,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:06,876 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:06,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:06,877 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2019-10-14 21:46:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,970 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2019-10-14 21:46:06,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:06,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:46:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,972 INFO L225 Difference]: With dead ends: 40 [2019-10-14 21:46:06,972 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:46:06,973 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 21:46:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:46:06,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-14 21:46:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:46:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 21:46:06,981 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2019-10-14 21:46:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,982 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 21:46:06,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 21:46:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:46:06,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,983 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,984 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1323409058, now seen corresponding path program 1 times [2019-10-14 21:46:06,985 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903344253] [2019-10-14 21:46:06,985 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,985 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:07,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903344253] [2019-10-14 21:46:07,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315726940] [2019-10-14 21:46:07,089 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 21:46:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:07,196 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,196 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:46:07,196 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361263249] [2019-10-14 21:46:07,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:46:07,197 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:46:07,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:07,198 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2019-10-14 21:46:07,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:07,307 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-10-14 21:46:07,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:46:07,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-14 21:46:07,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:07,311 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:46:07,311 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:46:07,312 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:46:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-10-14 21:46:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:46:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-14 21:46:07,322 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2019-10-14 21:46:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:07,322 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-14 21:46:07,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:46:07,323 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-14 21:46:07,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:46:07,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:07,324 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:07,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,526 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:07,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1582955806, now seen corresponding path program 2 times [2019-10-14 21:46:07,528 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:07,528 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724903081] [2019-10-14 21:46:07,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,529 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:46:07,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724903081] [2019-10-14 21:46:07,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939078954] [2019-10-14 21:46:07,642 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 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 21:46:07,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:07,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:07,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:46:07,734 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:46:07,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843862848] [2019-10-14 21:46:07,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:07,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:07,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:07,736 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2019-10-14 21:46:07,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:07,839 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2019-10-14 21:46:07,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:46:07,841 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-10-14 21:46:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:07,842 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:46:07,842 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:46:07,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:07,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:46:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-10-14 21:46:07,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:46:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-14 21:46:07,852 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2019-10-14 21:46:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:07,853 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-14 21:46:07,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-14 21:46:07,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:46:07,854 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:07,854 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:08,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:08,058 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:08,059 INFO L82 PathProgramCache]: Analyzing trace with hash -657216102, now seen corresponding path program 3 times [2019-10-14 21:46:08,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:08,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792318030] [2019-10-14 21:46:08,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:46:08,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792318030] [2019-10-14 21:46:08,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48166697] [2019-10-14 21:46:08,167 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 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 21:46:08,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:46:08,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:08,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:46:08,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:08,299 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:46:08,300 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:08,308 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:08,308 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:08,308 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-14 21:46:08,343 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2019-10-14 21:46:08,344 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:08,355 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:08,355 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:08,356 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2019-10-14 21:46:08,488 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:46:08,489 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:46:08,491 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 10 [2019-10-14 21:46:08,492 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:08,502 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:08,503 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 21:46:08,503 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:3 [2019-10-14 21:46:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:46:08,554 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:46:08,554 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-10-14 21:46:08,554 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439402377] [2019-10-14 21:46:08,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:08,555 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:08,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:08,556 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2019-10-14 21:46:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:08,813 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-10-14 21:46:08,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:46:08,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-10-14 21:46:08,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:08,815 INFO L225 Difference]: With dead ends: 42 [2019-10-14 21:46:08,815 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:46:08,816 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:08,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:46:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2019-10-14 21:46:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:46:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-10-14 21:46:08,826 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2019-10-14 21:46:08,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:08,826 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-10-14 21:46:08,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-10-14 21:46:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:46:08,828 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:08,828 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:09,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,042 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash -762567471, now seen corresponding path program 1 times [2019-10-14 21:46:09,043 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:09,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156023239] [2019-10-14 21:46:09,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:46:09,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156023239] [2019-10-14 21:46:09,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846738988] [2019-10-14 21:46:09,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:09,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:46:09,264 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:09,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:46:09,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001824976] [2019-10-14 21:46:09,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:46:09,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:09,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:46:09,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:09,267 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 8 states. [2019-10-14 21:46:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:09,397 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2019-10-14 21:46:09,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:46:09,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2019-10-14 21:46:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:09,401 INFO L225 Difference]: With dead ends: 69 [2019-10-14 21:46:09,401 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:46:09,402 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:46:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-10-14 21:46:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:46:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-10-14 21:46:09,415 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 35 [2019-10-14 21:46:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:09,415 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-10-14 21:46:09,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:46:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-10-14 21:46:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:46:09,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:09,419 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:09,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,631 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:09,631 INFO L82 PathProgramCache]: Analyzing trace with hash 395701069, now seen corresponding path program 2 times [2019-10-14 21:46:09,631 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:09,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030532837] [2019-10-14 21:46:09,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,632 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:46:09,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030532837] [2019-10-14 21:46:09,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146060806] [2019-10-14 21:46:09,731 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:09,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:09,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:46:09,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:46:09,814 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:09,814 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:46:09,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255479950] [2019-10-14 21:46:09,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:46:09,817 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:09,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:46:09,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:09,818 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 9 states. [2019-10-14 21:46:09,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:09,936 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2019-10-14 21:46:09,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:09,937 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-10-14 21:46:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:09,939 INFO L225 Difference]: With dead ends: 75 [2019-10-14 21:46:09,939 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:46:09,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:46:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2019-10-14 21:46:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:46:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-10-14 21:46:09,949 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2019-10-14 21:46:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:09,949 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-10-14 21:46:09,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:46:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-10-14 21:46:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:46:09,950 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:09,951 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:10,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:10,162 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:10,162 INFO L82 PathProgramCache]: Analyzing trace with hash 885326793, now seen corresponding path program 3 times [2019-10-14 21:46:10,163 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:10,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262138983] [2019-10-14 21:46:10,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:10,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:10,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:46:10,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262138983] [2019-10-14 21:46:10,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748782889] [2019-10-14 21:46:10,267 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 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 21:46:10,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 21:46:10,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:10,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 21:46:10,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:10,332 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:46:10,332 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:10,340 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:10,340 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:10,340 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-14 21:46:10,384 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2019-10-14 21:46:10,384 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:10,392 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:10,392 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:10,392 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2019-10-14 21:46:10,445 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:10,446 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:10,447 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 51 [2019-10-14 21:46:10,448 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:10,463 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:10,463 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:10,463 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:55 [2019-10-14 21:46:12,663 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (v_main_~i~0_25 Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (let ((.cse2 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|)) (.cse3 (* v_main_~i~0_25 (- 4))) (.cse0 (select |c_#memory_int| |v_main_~#b~0.base_BEFORE_CALL_1|)) (.cse1 (* v_main_~i~0_25 4))) (and (not (= |v_main_~#b~0.base_BEFORE_CALL_1| |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= 99999 v_main_~i~0_25) (= (select .cse0 (+ .cse1 (- 4))) (select .cse2 (+ .cse3 400000))) (= (select .cse2 (+ .cse3 399996)) (select .cse0 .cse1)) (< v_main_~i~0_25 100000)))) is different from true [2019-10-14 21:46:14,710 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 33 [2019-10-14 21:46:16,745 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 34 [2019-10-14 21:46:16,910 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:16,911 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:46:16,913 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:16,916 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:16,917 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:46:16,919 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 13 [2019-10-14 21:46:16,920 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:16,928 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:16,929 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 21:46:16,930 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:3 [2019-10-14 21:46:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 1 not checked. [2019-10-14 21:46:19,016 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:19,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 24 [2019-10-14 21:46:19,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355547602] [2019-10-14 21:46:19,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:46:19,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:19,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:46:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=429, Unknown=2, NotChecked=42, Total=552 [2019-10-14 21:46:19,018 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 24 states. [2019-10-14 21:46:24,151 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2019-10-14 21:46:28,215 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-10-14 21:46:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:30,557 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2019-10-14 21:46:30,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:46:30,558 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 43 [2019-10-14 21:46:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:30,559 INFO L225 Difference]: With dead ends: 91 [2019-10-14 21:46:30,559 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:46:30,560 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=365, Invalid=1799, Unknown=2, NotChecked=90, Total=2256 [2019-10-14 21:46:30,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:46:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-10-14 21:46:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:46:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-10-14 21:46:30,571 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 43 [2019-10-14 21:46:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:30,571 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-10-14 21:46:30,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:46:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-10-14 21:46:30,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:46:30,573 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:30,573 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:30,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:30,776 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:30,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1146292860, now seen corresponding path program 4 times [2019-10-14 21:46:30,777 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:30,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536071891] [2019-10-14 21:46:30,778 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:30,778 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:30,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-14 21:46:30,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536071891] [2019-10-14 21:46:30,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129057407] [2019-10-14 21:46:30,875 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 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 21:46:30,922 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:30,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:30,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:46:30,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-14 21:46:30,944 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:30,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:46:30,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292254498] [2019-10-14 21:46:30,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:46:30,946 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:46:30,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:46:30,946 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 11 states. [2019-10-14 21:46:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:31,068 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2019-10-14 21:46:31,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:46:31,068 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2019-10-14 21:46:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:31,069 INFO L225 Difference]: With dead ends: 103 [2019-10-14 21:46:31,069 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:46:31,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:46:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:46:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-10-14 21:46:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:46:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-10-14 21:46:31,085 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2019-10-14 21:46:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:31,085 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-10-14 21:46:31,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:46:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-10-14 21:46:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:46:31,086 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:31,086 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:31,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:31,287 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:31,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1452772088, now seen corresponding path program 5 times [2019-10-14 21:46:31,288 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:31,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397472831] [2019-10-14 21:46:31,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:31,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:31,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-14 21:46:31,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397472831] [2019-10-14 21:46:31,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10558700] [2019-10-14 21:46:31,421 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 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 [2019-10-14 21:46:31,847 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-10-14 21:46:31,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:31,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:46:31,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-14 21:46:31,869 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:31,869 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:46:31,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661905816] [2019-10-14 21:46:31,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:46:31,870 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:31,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:46:31,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:31,871 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 12 states. [2019-10-14 21:46:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:31,985 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2019-10-14 21:46:31,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:46:31,985 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2019-10-14 21:46:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:31,986 INFO L225 Difference]: With dead ends: 109 [2019-10-14 21:46:31,986 INFO L226 Difference]: Without dead ends: 68 [2019-10-14 21:46:31,987 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-14 21:46:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-10-14 21:46:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:46:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-10-14 21:46:31,999 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2019-10-14 21:46:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:31,999 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-10-14 21:46:31,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:46:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-10-14 21:46:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:46:32,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:32,004 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:32,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:32,205 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:32,205 INFO L82 PathProgramCache]: Analyzing trace with hash -709862028, now seen corresponding path program 6 times [2019-10-14 21:46:32,206 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:32,206 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302156464] [2019-10-14 21:46:32,206 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:32,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:32,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-14 21:46:32,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302156464] [2019-10-14 21:46:32,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507486800] [2019-10-14 21:46:32,323 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:32,527 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 21:46:32,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:32,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:46:32,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:46:32,550 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:32,550 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:46:32,551 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511935935] [2019-10-14 21:46:32,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:46:32,551 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:32,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:46:32,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:32,552 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 13 states. [2019-10-14 21:46:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:32,690 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2019-10-14 21:46:32,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:46:32,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2019-10-14 21:46:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:32,691 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:46:32,691 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:46:32,692 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:46:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-10-14 21:46:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:46:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-10-14 21:46:32,703 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2019-10-14 21:46:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:32,704 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-10-14 21:46:32,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:46:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-10-14 21:46:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:46:32,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:32,705 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:32,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:32,910 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1364688400, now seen corresponding path program 7 times [2019-10-14 21:46:32,911 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:32,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325144830] [2019-10-14 21:46:32,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:32,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:32,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-14 21:46:33,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325144830] [2019-10-14 21:46:33,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337350222] [2019-10-14 21:46:33,088 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:33,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:46:33,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-14 21:46:33,206 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:33,207 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:46:33,207 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027808945] [2019-10-14 21:46:33,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:46:33,208 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:33,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:46:33,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:46:33,209 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 14 states. [2019-10-14 21:46:33,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:33,412 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2019-10-14 21:46:33,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:46:33,412 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2019-10-14 21:46:33,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:33,413 INFO L225 Difference]: With dead ends: 121 [2019-10-14 21:46:33,413 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:46:33,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:46:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:46:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2019-10-14 21:46:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:46:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2019-10-14 21:46:33,437 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2019-10-14 21:46:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:33,437 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2019-10-14 21:46:33,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:46:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2019-10-14 21:46:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:46:33,439 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:33,439 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:33,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:33,648 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:33,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2146764692, now seen corresponding path program 8 times [2019-10-14 21:46:33,649 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:33,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020225357] [2019-10-14 21:46:33,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:33,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:33,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:46:33,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020225357] [2019-10-14 21:46:33,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486449895] [2019-10-14 21:46:33,808 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:33,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:33,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:33,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:46:33,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-14 21:46:33,901 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:33,901 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:46:33,901 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441433707] [2019-10-14 21:46:33,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:46:33,902 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:33,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:46:33,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:33,903 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 15 states. [2019-10-14 21:46:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:34,050 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2019-10-14 21:46:34,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:46:34,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2019-10-14 21:46:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:34,053 INFO L225 Difference]: With dead ends: 127 [2019-10-14 21:46:34,053 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:46:34,054 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:34,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:46:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-10-14 21:46:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 21:46:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2019-10-14 21:46:34,063 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 71 [2019-10-14 21:46:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:34,063 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2019-10-14 21:46:34,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:46:34,064 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2019-10-14 21:46:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-14 21:46:34,065 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:34,065 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:34,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:34,276 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:34,276 INFO L82 PathProgramCache]: Analyzing trace with hash 434290920, now seen corresponding path program 9 times [2019-10-14 21:46:34,276 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:34,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564778279] [2019-10-14 21:46:34,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:34,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:34,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-10-14 21:46:34,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564778279] [2019-10-14 21:46:34,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708553808] [2019-10-14 21:46:34,428 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:34,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 21:46:34,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:34,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-14 21:46:34,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:34,510 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:46:34,510 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:34,516 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:34,517 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:34,517 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-14 21:46:34,549 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2019-10-14 21:46:34,550 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:34,559 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:34,559 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:34,560 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2019-10-14 21:46:34,633 INFO L341 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2019-10-14 21:46:34,633 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 51 [2019-10-14 21:46:34,634 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:34,645 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:34,646 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:34,646 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2019-10-14 21:46:34,724 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:34,726 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:34,727 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:34,729 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:34,730 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:34,731 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:34,737 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 78 [2019-10-14 21:46:34,738 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:34,760 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:34,760 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:34,761 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2019-10-14 21:46:37,006 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (|v_main_~#b~0.base_BEFORE_CALL_2| Int) (v_main_~i~0_68 Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|)) (.cse1 (* v_main_~i~0_68 (- 4))) (.cse2 (select |c_#memory_int| |v_main_~#b~0.base_BEFORE_CALL_2|)) (.cse3 (* v_main_~i~0_68 4))) (and (<= 99999 v_main_~i~0_68) (= (select .cse0 (+ .cse1 400000)) (select .cse2 (+ .cse3 (- 4)))) (= (select .cse2 .cse3) (select .cse0 (+ .cse1 399996))) (not (= |v_main_~#b~0.base_BEFORE_CALL_2| |v_main_~#a~0.base_BEFORE_CALL_2|)) (= (select .cse0 (+ .cse1 400004)) (select .cse2 (+ .cse3 (- 8)))) (< v_main_~i~0_68 100000)))) is different from true [2019-10-14 21:46:39,136 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (v_main_~i~0_68 Int) (|v_main_~#b~0.base_BEFORE_CALL_3| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#b~0.base_BEFORE_CALL_3|)) (.cse1 (* v_main_~i~0_68 4)) (.cse2 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|)) (.cse3 (* v_main_~i~0_68 (- 4)))) (and (<= 99999 v_main_~i~0_68) (= (select .cse0 (+ .cse1 (- 8))) (select .cse2 (+ .cse3 400004))) (= (select .cse2 (+ .cse3 400000)) (select .cse0 (+ .cse1 (- 4)))) (= (select .cse0 .cse1) (select .cse2 (+ .cse3 399996))) (not (= |v_main_~#b~0.base_BEFORE_CALL_3| |v_main_~#a~0.base_BEFORE_CALL_3|)) (< v_main_~i~0_68 100000)))) is different from true [2019-10-14 21:46:41,193 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 40 [2019-10-14 21:46:43,231 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 41 [2019-10-14 21:46:43,385 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:43,386 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:46:43,387 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:43,388 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:43,389 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:43,390 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:43,391 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:43,392 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:46:43,393 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:46:43,394 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 16 [2019-10-14 21:46:43,395 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:43,402 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:43,402 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 21:46:43,403 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:80, output treesize:3 [2019-10-14 21:46:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 55 proven. 11 refuted. 0 times theorem prover too weak. 185 trivial. 7 not checked. [2019-10-14 21:46:45,493 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:45,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 33 [2019-10-14 21:46:45,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575728495] [2019-10-14 21:46:45,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:46:45,494 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:45,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:46:45,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=785, Unknown=3, NotChecked=118, Total=1056 [2019-10-14 21:46:45,495 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 33 states. [2019-10-14 21:46:51,878 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 69 DAG size of output: 49