/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/init-4-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:50:29,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:50:29,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:50:29,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:50:29,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:50:29,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:50:29,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:50:29,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:50:29,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:50:29,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:50:29,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:50:29,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:50:29,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:50:29,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:50:29,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:50:29,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:50:29,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:50:29,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:50:29,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:50:29,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:50:29,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:50:29,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:50:29,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:50:29,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:50:29,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:50:29,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:50:29,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:50:29,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:50:29,530 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:50:29,561 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:50:29,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:50:29,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:50:29,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:50:29,563 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:50:29,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:50:29,563 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:50:29,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:50:29,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:50:29,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:50:29,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:50:29,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:50:29,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:50:29,564 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:50:29,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:50:29,565 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:50:29,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:50:29,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:50:29,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:50:29,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:50:29,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:50:29,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:50:29,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:50:29,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:50:29,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:50:29,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:50:29,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:50:29,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:50:29,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:50:29,856 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:50:29,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:50:29,877 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:50:29,878 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:50:29,879 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:50:29,880 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2019-11-06 18:50:29,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d4e428aa/8f382a9681924e83913bc22f98cd7a57/FLAGb082074dc [2019-11-06 18:50:30,461 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:50:30,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2019-11-06 18:50:30,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d4e428aa/8f382a9681924e83913bc22f98cd7a57/FLAGb082074dc [2019-11-06 18:50:30,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d4e428aa/8f382a9681924e83913bc22f98cd7a57 [2019-11-06 18:50:30,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:50:30,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:50:30,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:30,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:50:30,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:50:30,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:30" (1/1) ... [2019-11-06 18:50:30,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65193229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:30, skipping insertion in model container [2019-11-06 18:50:30,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:30" (1/1) ... [2019-11-06 18:50:30,871 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:50:30,896 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:50:31,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:31,112 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:50:31,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:31,239 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:50:31,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:31 WrapperNode [2019-11-06 18:50:31,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:31,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:50:31,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:50:31,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:50:31,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:31" (1/1) ... [2019-11-06 18:50:31,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:31" (1/1) ... [2019-11-06 18:50:31,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:31" (1/1) ... [2019-11-06 18:50:31,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:31" (1/1) ... [2019-11-06 18:50:31,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:31" (1/1) ... [2019-11-06 18:50:31,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:31" (1/1) ... [2019-11-06 18:50:31,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:31" (1/1) ... [2019-11-06 18:50:31,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:50:31,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:50:31,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:50:31,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:50:31,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:50:31,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:50:31,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:50:31,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:50:31,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:50:31,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:50:31,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:50:31,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:50:31,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:50:31,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:50:31,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:50:31,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:50:31,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:50:31,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:50:31,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:50:31,632 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:50:31,632 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-06 18:50:31,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:31 BoogieIcfgContainer [2019-11-06 18:50:31,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:50:31,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:50:31,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:50:31,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:50:31,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:50:30" (1/3) ... [2019-11-06 18:50:31,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a952bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:31, skipping insertion in model container [2019-11-06 18:50:31,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:31" (2/3) ... [2019-11-06 18:50:31,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a952bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:31, skipping insertion in model container [2019-11-06 18:50:31,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:31" (3/3) ... [2019-11-06 18:50:31,641 INFO L109 eAbstractionObserver]: Analyzing ICFG init-4-n-u.c [2019-11-06 18:50:31,648 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:50:31,654 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:50:31,663 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:50:31,684 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:50:31,684 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:50:31,684 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:50:31,684 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:50:31,684 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:50:31,685 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:50:31,685 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:50:31,685 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:50:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-06 18:50:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:50:31,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:31,706 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:31,708 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash -129587761, now seen corresponding path program 1 times [2019-11-06 18:50:31,719 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:31,720 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300971118] [2019-11-06 18:50:31,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:31,817 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:31,818 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586009721] [2019-11-06 18:50:31,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:31,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-06 18:50:31,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:31,921 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300971118] [2019-11-06 18:50:31,922 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:31,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586009721] [2019-11-06 18:50:31,922 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:31,923 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 18:50:31,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289060909] [2019-11-06 18:50:31,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 18:50:31,927 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:31,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 18:50:31,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 18:50:31,940 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2019-11-06 18:50:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:31,965 INFO L93 Difference]: Finished difference Result 62 states and 95 transitions. [2019-11-06 18:50:31,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 18:50:31,967 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-11-06 18:50:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:31,976 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:50:31,976 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:50:31,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 18:50:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:50:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-06 18:50:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:50:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-11-06 18:50:32,016 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2019-11-06 18:50:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:32,017 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-11-06 18:50:32,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 18:50:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-11-06 18:50:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:50:32,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:32,019 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:32,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:32,221 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:32,223 INFO L82 PathProgramCache]: Analyzing trace with hash -269441638, now seen corresponding path program 1 times [2019-11-06 18:50:32,223 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:32,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515018181] [2019-11-06 18:50:32,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:32,239 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:32,239 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859615087] [2019-11-06 18:50:32,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:32,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:32,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:32,353 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515018181] [2019-11-06 18:50:32,354 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:32,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859615087] [2019-11-06 18:50:32,354 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:32,354 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:50:32,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127599640] [2019-11-06 18:50:32,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:50:32,357 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:32,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:50:32,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:50:32,358 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 3 states. [2019-11-06 18:50:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:32,406 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2019-11-06 18:50:32,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:50:32,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:50:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:32,409 INFO L225 Difference]: With dead ends: 52 [2019-11-06 18:50:32,409 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:50:32,412 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:50:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:50:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-11-06 18:50:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 18:50:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-06 18:50:32,423 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2019-11-06 18:50:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:32,425 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-06 18:50:32,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:50:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-06 18:50:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:50:32,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:32,428 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:32,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:32,633 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1901462552, now seen corresponding path program 1 times [2019-11-06 18:50:32,635 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:32,635 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086541912] [2019-11-06 18:50:32,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:32,645 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:32,646 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829281247] [2019-11-06 18:50:32,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:32,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:32,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:32,731 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086541912] [2019-11-06 18:50:32,731 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:32,731 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829281247] [2019-11-06 18:50:32,732 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:32,732 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:32,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953346516] [2019-11-06 18:50:32,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:32,733 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:32,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:32,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:32,734 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2019-11-06 18:50:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:32,804 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2019-11-06 18:50:32,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:32,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-06 18:50:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:32,808 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:50:32,808 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:50:32,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:50:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-11-06 18:50:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:50:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-11-06 18:50:32,822 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2019-11-06 18:50:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:32,822 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-11-06 18:50:32,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-11-06 18:50:32,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:50:32,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:32,824 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:33,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:33,034 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:33,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:33,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1769523126, now seen corresponding path program 1 times [2019-11-06 18:50:33,035 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:33,036 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394696519] [2019-11-06 18:50:33,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:33,054 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:33,054 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326525063] [2019-11-06 18:50:33,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:33,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:33,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:33,165 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394696519] [2019-11-06 18:50:33,165 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:33,165 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326525063] [2019-11-06 18:50:33,166 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:33,166 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:33,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128414899] [2019-11-06 18:50:33,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:33,167 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:33,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:33,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:33,168 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 4 states. [2019-11-06 18:50:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:33,248 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2019-11-06 18:50:33,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:33,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-06 18:50:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:33,250 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:50:33,250 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:50:33,251 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:50:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2019-11-06 18:50:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:50:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-11-06 18:50:33,260 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2019-11-06 18:50:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:33,260 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-11-06 18:50:33,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-11-06 18:50:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:50:33,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:33,261 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:33,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:33,469 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:33,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:33,470 INFO L82 PathProgramCache]: Analyzing trace with hash -914412998, now seen corresponding path program 1 times [2019-11-06 18:50:33,470 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:33,470 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592932933] [2019-11-06 18:50:33,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:33,480 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:33,481 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101461164] [2019-11-06 18:50:33,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:33,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:33,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:33,562 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592932933] [2019-11-06 18:50:33,562 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:33,562 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101461164] [2019-11-06 18:50:33,562 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:33,563 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:33,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020460608] [2019-11-06 18:50:33,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:33,564 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:33,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:33,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:33,564 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 4 states. [2019-11-06 18:50:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:33,640 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2019-11-06 18:50:33,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:33,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-06 18:50:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:33,642 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:50:33,642 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 18:50:33,643 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 18:50:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-11-06 18:50:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:50:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-11-06 18:50:33,659 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2019-11-06 18:50:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:33,660 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-11-06 18:50:33,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-11-06 18:50:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:50:33,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:33,662 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:33,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:33,874 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:33,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:33,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2078217125, now seen corresponding path program 1 times [2019-11-06 18:50:33,875 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:33,876 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769161723] [2019-11-06 18:50:33,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:33,883 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:33,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102257755] [2019-11-06 18:50:33,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:33,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:33,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:33,963 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769161723] [2019-11-06 18:50:33,963 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:33,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102257755] [2019-11-06 18:50:33,964 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:33,964 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:50:33,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702087947] [2019-11-06 18:50:33,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:50:33,965 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:33,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:50:33,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:33,965 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 5 states. [2019-11-06 18:50:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:34,056 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2019-11-06 18:50:34,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:50:34,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-11-06 18:50:34,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:34,059 INFO L225 Difference]: With dead ends: 72 [2019-11-06 18:50:34,059 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:50:34,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:50:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-06 18:50:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:50:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-11-06 18:50:34,074 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2019-11-06 18:50:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:34,075 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-11-06 18:50:34,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:50:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-11-06 18:50:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:50:34,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:34,077 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:34,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:34,281 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash 360470426, now seen corresponding path program 2 times [2019-11-06 18:50:34,282 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:34,282 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620215247] [2019-11-06 18:50:34,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:34,290 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:34,291 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147214902] [2019-11-06 18:50:34,291 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 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 [2019-11-06 18:50:34,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:50:34,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:34,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:34,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:50:34,381 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620215247] [2019-11-06 18:50:34,381 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:34,381 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147214902] [2019-11-06 18:50:34,382 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:34,382 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-06 18:50:34,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657332227] [2019-11-06 18:50:34,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:34,383 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:34,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:34,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:34,383 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2019-11-06 18:50:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:34,434 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2019-11-06 18:50:34,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:34,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-06 18:50:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:34,436 INFO L225 Difference]: With dead ends: 83 [2019-11-06 18:50:34,437 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:50:34,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:50:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2019-11-06 18:50:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:50:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2019-11-06 18:50:34,461 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 27 [2019-11-06 18:50:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:34,462 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2019-11-06 18:50:34,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2019-11-06 18:50:34,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:50:34,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:34,464 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:34,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:34,671 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash 537748890, now seen corresponding path program 3 times [2019-11-06 18:50:34,671 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:34,672 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011023737] [2019-11-06 18:50:34,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:34,679 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:34,679 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313881749] [2019-11-06 18:50:34,679 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 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 [2019-11-06 18:50:34,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:50:34,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:34,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 18:50:34,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:34,835 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2019-11-06 18:50:34,835 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:34,865 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:34,865 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:50:34,866 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2019-11-06 18:50:34,914 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:50:34,915 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 23 treesize of output 22 [2019-11-06 18:50:34,917 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:34,928 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:34,930 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:50:34,930 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:25 [2019-11-06 18:50:35,016 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:50:35,059 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:35,060 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 201 [2019-11-06 18:50:35,062 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:35,115 INFO L567 ElimStorePlain]: treesize reduction 144, result has 28.4 percent of original size [2019-11-06 18:50:35,116 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-06 18:50:35,118 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:57 [2019-11-06 18:50:37,229 WARN L191 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 38 [2019-11-06 18:50:37,254 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:50:37,356 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2019-11-06 18:50:37,356 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:37,357 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 6 case distinctions, treesize of input 87 treesize of output 447 [2019-11-06 18:50:37,358 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:37,420 INFO L567 ElimStorePlain]: treesize reduction 285, result has 23.8 percent of original size [2019-11-06 18:50:37,421 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-11-06 18:50:37,422 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:93, output treesize:89 [2019-11-06 18:50:39,252 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:50:39,253 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:39,254 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2019-11-06 18:50:39,254 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:39,258 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:39,259 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:50:39,259 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-11-06 18:50:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 17 refuted. 1 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:50:39,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011023737] [2019-11-06 18:50:39,320 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:39,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313881749] [2019-11-06 18:50:39,320 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:39,321 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-06 18:50:39,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108415806] [2019-11-06 18:50:39,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:50:39,321 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:39,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:50:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=176, Unknown=3, NotChecked=0, Total=240 [2019-11-06 18:50:39,323 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 16 states. [2019-11-06 18:50:43,850 WARN L191 SmtUtils]: Spent 929.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-06 18:50:56,635 WARN L191 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 39