/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-non-constant-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:50:40,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:50:40,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:50:40,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:50:40,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:50:40,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:50:40,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:50:40,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:50:40,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:50:40,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:50:40,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:50:40,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:50:40,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:50:40,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:50:40,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:50:40,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:50:40,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:50:40,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:50:40,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:50:40,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:50:40,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:50:40,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:50:40,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:50:40,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:50:40,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:50:40,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:50:40,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:50:40,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:50:40,378 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 18:50:40,396 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:50:40,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:50:40,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:50:40,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:50:40,398 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:50:40,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:50:40,399 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:50:40,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:50:40,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:50:40,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:50:40,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:50:40,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:50:40,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:50:40,400 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:50:40,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:50:40,402 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:50:40,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:50:40,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:50:40,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:50:40,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:50:40,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:50:40,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:50:40,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:50:40,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:50:40,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:50:40,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:50:40,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:50:40,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:50:40,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:50:40,686 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:50:40,699 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:50:40,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:50:40,704 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:50:40,705 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:50:40,705 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-2-n-u.c [2019-11-06 18:50:40,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a04b8562a/c2c69132fd1c49ad838166cf75cccc6e/FLAG87c89decf [2019-11-06 18:50:41,193 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:50:41,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-non-constant-2-n-u.c [2019-11-06 18:50:41,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a04b8562a/c2c69132fd1c49ad838166cf75cccc6e/FLAG87c89decf [2019-11-06 18:50:41,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a04b8562a/c2c69132fd1c49ad838166cf75cccc6e [2019-11-06 18:50:41,606 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:50:41,608 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:50:41,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:41,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:50:41,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:50:41,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:41" (1/1) ... [2019-11-06 18:50:41,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2406b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41, skipping insertion in model container [2019-11-06 18:50:41,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:41" (1/1) ... [2019-11-06 18:50:41,630 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:50:41,654 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:50:41,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:41,901 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:50:41,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:41,944 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:50:41,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41 WrapperNode [2019-11-06 18:50:41,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:41,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:50:41,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:50:41,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:50:42,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41" (1/1) ... [2019-11-06 18:50:42,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41" (1/1) ... [2019-11-06 18:50:42,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41" (1/1) ... [2019-11-06 18:50:42,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41" (1/1) ... [2019-11-06 18:50:42,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41" (1/1) ... [2019-11-06 18:50:42,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41" (1/1) ... [2019-11-06 18:50:42,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41" (1/1) ... [2019-11-06 18:50:42,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:50:42,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:50:42,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:50:42,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:50:42,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41" (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 18:50:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:50:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:50:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:50:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:50:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:50:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:50:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:50:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:50:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-06 18:50:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:50:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:50:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:50:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:50:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:50:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:50:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:50:42,439 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:50:42,439 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 18:50:42,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:42 BoogieIcfgContainer [2019-11-06 18:50:42,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:50:42,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:50:42,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:50:42,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:50:42,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:50:41" (1/3) ... [2019-11-06 18:50:42,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587f3dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:42, skipping insertion in model container [2019-11-06 18:50:42,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41" (2/3) ... [2019-11-06 18:50:42,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587f3dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:42, skipping insertion in model container [2019-11-06 18:50:42,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:42" (3/3) ... [2019-11-06 18:50:42,464 INFO L109 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2019-11-06 18:50:42,474 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:50:42,495 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:50:42,506 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:50:42,532 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:50:42,533 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:50:42,533 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:50:42,533 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:50:42,533 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:50:42,533 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:50:42,533 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:50:42,534 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:50:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-06 18:50:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:50:42,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:42,553 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:42,555 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:42,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1832694891, now seen corresponding path program 1 times [2019-11-06 18:50:42,568 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:42,568 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928203841] [2019-11-06 18:50:42,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:42,658 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:42,658 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821931016] [2019-11-06 18:50:42,659 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 18:50:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:42,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:42,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:42,831 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 18:50:42,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928203841] [2019-11-06 18:50:42,833 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:42,834 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821931016] [2019-11-06 18:50:42,835 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:42,835 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:50:42,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665105382] [2019-11-06 18:50:42,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:50:42,843 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:50:42,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:42,861 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2019-11-06 18:50:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:42,986 INFO L93 Difference]: Finished difference Result 62 states and 91 transitions. [2019-11-06 18:50:42,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:50:42,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-06 18:50:42,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:42,997 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:50:42,998 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:50:43,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:50:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:50:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-11-06 18:50:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-06 18:50:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-06 18:50:43,041 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2019-11-06 18:50:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:43,042 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-06 18:50:43,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:50:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-06 18:50:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:50:43,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:43,043 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:43,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:43,248 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1374604441, now seen corresponding path program 1 times [2019-11-06 18:50:43,250 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:43,250 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357404099] [2019-11-06 18:50:43,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:43,261 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:43,262 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432221335] [2019-11-06 18:50:43,262 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 18:50:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:43,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:43,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:43,385 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 18:50:43,386 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357404099] [2019-11-06 18:50:43,386 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:43,386 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432221335] [2019-11-06 18:50:43,386 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:43,387 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:50:43,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436901594] [2019-11-06 18:50:43,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:50:43,389 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:43,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:50:43,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:43,390 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2019-11-06 18:50:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:43,478 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-06 18:50:43,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:50:43,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-06 18:50:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:43,480 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:50:43,480 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 18:50:43,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:50:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 18:50:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-06 18:50:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:50:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-06 18:50:43,488 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2019-11-06 18:50:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:43,488 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-06 18:50:43,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:50:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-06 18:50:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:50:43,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:43,490 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:43,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:43,706 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:43,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1853309542, now seen corresponding path program 1 times [2019-11-06 18:50:43,707 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:43,708 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040371759] [2019-11-06 18:50:43,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:43,727 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:43,727 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228983752] [2019-11-06 18:50:43,731 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 18:50:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:43,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:50:43,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:43,875 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-06 18:50:43,875 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:43,879 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:43,880 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:50:43,880 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-06 18:50:43,953 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:43,954 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2019-11-06 18:50:43,955 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-06 18:50:43,971 INFO L567 ElimStorePlain]: treesize reduction 14, result has 41.7 percent of original size [2019-11-06 18:50:43,971 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:50:43,972 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:30, output treesize:10 [2019-11-06 18:50:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:44,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040371759] [2019-11-06 18:50:44,019 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:44,019 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228983752] [2019-11-06 18:50:44,019 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:44,020 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 18:50:44,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079337059] [2019-11-06 18:50:44,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:50:44,020 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:44,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:50:44,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:50:44,021 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2019-11-06 18:50:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:44,195 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2019-11-06 18:50:44,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:50:44,196 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-06 18:50:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:44,197 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:50:44,197 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 18:50:44,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:50:44,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 18:50:44,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 36. [2019-11-06 18:50:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:50:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-11-06 18:50:44,208 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 18 [2019-11-06 18:50:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:44,208 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-11-06 18:50:44,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:50:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-11-06 18:50:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:50:44,210 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:44,210 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:44,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:44,414 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:44,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:44,414 INFO L82 PathProgramCache]: Analyzing trace with hash 826185545, now seen corresponding path program 2 times [2019-11-06 18:50:44,415 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:44,415 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866843443] [2019-11-06 18:50:44,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:44,434 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:44,434 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791642655] [2019-11-06 18:50:44,434 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 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 18:50:44,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:50:44,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:44,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:50:44,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:44,517 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 19 treesize of output 15 [2019-11-06 18:50:44,517 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:44,525 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:44,526 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:50:44,526 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2019-11-06 18:50:44,592 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:50:44,593 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 31 treesize of output 30 [2019-11-06 18:50:44,594 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:44,608 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:44,610 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 18:50:44,610 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:39 [2019-11-06 18:50:44,737 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:50:44,738 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:50:44,741 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:44,741 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 16 [2019-11-06 18:50:44,742 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:44,751 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:44,752 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:50:44,752 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:10 [2019-11-06 18:50:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:44,802 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866843443] [2019-11-06 18:50:44,803 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:44,803 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791642655] [2019-11-06 18:50:44,803 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:44,803 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-06 18:50:44,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499468023] [2019-11-06 18:50:44,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:50:44,804 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:44,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:50:44,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:50:44,805 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 13 states. [2019-11-06 18:50:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:45,375 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2019-11-06 18:50:45,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:50:45,376 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-11-06 18:50:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:45,377 INFO L225 Difference]: With dead ends: 64 [2019-11-06 18:50:45,377 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 18:50:45,378 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:50:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 18:50:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 31. [2019-11-06 18:50:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:50:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-06 18:50:45,387 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2019-11-06 18:50:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:45,388 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-06 18:50:45,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:50:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-06 18:50:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:50:45,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:45,389 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:45,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:45,593 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:45,594 INFO L82 PathProgramCache]: Analyzing trace with hash 283549604, now seen corresponding path program 1 times [2019-11-06 18:50:45,595 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:45,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673305553] [2019-11-06 18:50:45,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:45,608 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:45,608 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390069142] [2019-11-06 18:50:45,609 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 18:50:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:45,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:50:45,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:45,698 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673305553] [2019-11-06 18:50:45,699 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:45,699 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390069142] [2019-11-06 18:50:45,699 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:45,699 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 18:50:45,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684690867] [2019-11-06 18:50:45,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:50:45,700 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:50:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:50:45,701 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2019-11-06 18:50:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:45,826 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2019-11-06 18:50:45,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:50:45,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-06 18:50:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:45,833 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:50:45,833 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 18:50:45,835 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:50:45,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 18:50:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2019-11-06 18:50:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:50:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2019-11-06 18:50:45,864 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 25 [2019-11-06 18:50:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:45,865 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2019-11-06 18:50:45,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:50:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2019-11-06 18:50:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:50:45,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:45,867 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:46,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:46,071 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:46,071 INFO L82 PathProgramCache]: Analyzing trace with hash -86620457, now seen corresponding path program 2 times [2019-11-06 18:50:46,071 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:46,071 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713704668] [2019-11-06 18:50:46,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:46,078 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:46,078 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841641013] [2019-11-06 18:50:46,079 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 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 18:50:46,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:50:46,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:46,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:50:46,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:46,169 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-06 18:50:46,170 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:46,171 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:46,172 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:50:46,172 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-06 18:50:46,235 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:46,236 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2019-11-06 18:50:46,236 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-06 18:50:46,249 INFO L567 ElimStorePlain]: treesize reduction 16, result has 42.9 percent of original size [2019-11-06 18:50:46,250 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:50:46,250 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:12 [2019-11-06 18:50:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:46,285 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713704668] [2019-11-06 18:50:46,285 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:46,286 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841641013] [2019-11-06 18:50:46,286 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:46,286 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 18:50:46,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62966060] [2019-11-06 18:50:46,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:50:46,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:46,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:50:46,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:50:46,287 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 12 states. [2019-11-06 18:50:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:46,540 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2019-11-06 18:50:46,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:50:46,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2019-11-06 18:50:46,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:46,542 INFO L225 Difference]: With dead ends: 101 [2019-11-06 18:50:46,542 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 18:50:46,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:50:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 18:50:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 65. [2019-11-06 18:50:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:50:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2019-11-06 18:50:46,561 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 26 [2019-11-06 18:50:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:46,561 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2019-11-06 18:50:46,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:50:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2019-11-06 18:50:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:50:46,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:46,563 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:46,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:46,774 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:46,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2057480932, now seen corresponding path program 1 times [2019-11-06 18:50:46,775 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:46,775 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728975010] [2019-11-06 18:50:46,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:46,783 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:46,783 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369216976] [2019-11-06 18:50:46,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:50:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:46,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:50:46,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:50:46,875 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728975010] [2019-11-06 18:50:46,875 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:46,875 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369216976] [2019-11-06 18:50:46,875 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:46,875 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 18:50:46,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378865886] [2019-11-06 18:50:46,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:50:46,876 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:46,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:50:46,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:50:46,877 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand 7 states. [2019-11-06 18:50:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:46,989 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2019-11-06 18:50:46,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:50:46,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-11-06 18:50:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:46,991 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:50:46,991 INFO L226 Difference]: Without dead ends: 101 [2019-11-06 18:50:46,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:50:46,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-06 18:50:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2019-11-06 18:50:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-06 18:50:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2019-11-06 18:50:47,032 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 28 [2019-11-06 18:50:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:47,035 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2019-11-06 18:50:47,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:50:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2019-11-06 18:50:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:50:47,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:47,039 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:47,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:47,244 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:47,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1238179277, now seen corresponding path program 3 times [2019-11-06 18:50:47,245 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:47,245 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941931066] [2019-11-06 18:50:47,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:47,251 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:47,252 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983175237] [2019-11-06 18:50:47,252 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 18:50:47,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:50:47,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:47,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-06 18:50:47,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:47,375 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-06 18:50:47,376 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:47,380 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:47,381 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:50:47,381 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-06 18:50:47,426 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:47,426 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 82 [2019-11-06 18:50:47,427 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:47,460 INFO L567 ElimStorePlain]: treesize reduction 30, result has 64.7 percent of original size [2019-11-06 18:50:47,460 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:50:47,460 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:55 [2019-11-06 18:50:47,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:50:47,515 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:50:47,551 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:47,552 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 2 case distinctions, treesize of input 68 treesize of output 133 [2019-11-06 18:50:47,553 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:47,560 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:50:47,564 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 113 treesize of output 112 [2019-11-06 18:50:47,565 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:47,645 INFO L567 ElimStorePlain]: treesize reduction 75, result has 70.4 percent of original size [2019-11-06 18:50:47,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:50:47,648 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 2 xjuncts. [2019-11-06 18:50:47,648 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:182, output treesize:178 [2019-11-06 18:50:47,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:50:47,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:50:47,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:50:47,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:50:47,867 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2019-11-06 18:50:47,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 18:50:48,227 WARN L191 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2019-11-06 18:50:48,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 18:50:48,545 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-11-06 18:50:49,480 WARN L191 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-06 18:50:49,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 18:50:50,169 WARN L191 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-11-06 18:50:52,313 WARN L191 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-11-06 18:50:52,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 18:50:52,334 INFO L392 ElimStorePlain]: Different costs {6=[v_prenex_10, v_prenex_12], 12=[|#memory_int|]} [2019-11-06 18:50:52,343 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:50:52,344 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:50:52,346 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:52,346 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 51 [2019-11-06 18:50:52,347 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:52,412 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:52,419 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:50:52,420 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:50:52,422 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:52,423 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 51 [2019-11-06 18:50:52,424 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:52,474 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:52,487 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:50:52,489 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:50:52,510 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:50:52,511 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 108 [2019-11-06 18:50:52,512 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-06 18:50:52,607 INFO L567 ElimStorePlain]: treesize reduction 92, result has 47.4 percent of original size [2019-11-06 18:50:52,608 INFO L496 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2019-11-06 18:50:52,609 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:253, output treesize:77 [2019-11-06 18:50:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:50:54,757 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941931066] [2019-11-06 18:50:54,757 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:54,757 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983175237] [2019-11-06 18:50:54,757 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:54,757 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-06 18:50:54,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879509836] [2019-11-06 18:50:54,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:50:54,758 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:54,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:50:54,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=259, Unknown=1, NotChecked=0, Total=306 [2019-11-06 18:50:54,759 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 18 states. [2019-11-06 18:50:56,622 WARN L191 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 110 DAG size of output: 52 [2019-11-06 18:50:56,983 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2019-11-06 18:51:02,710 WARN L191 SmtUtils]: Spent 5.57 s on a formula simplification. DAG size of input: 141 DAG size of output: 62 [2019-11-06 18:51:03,135 WARN L191 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2019-11-06 18:51:04,062 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2019-11-06 18:51:04,651 WARN L191 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 48 [2019-11-06 18:51:25,864 WARN L191 SmtUtils]: Spent 21.10 s on a formula simplification. DAG size of input: 123 DAG size of output: 121 [2019-11-06 18:51:26,328 WARN L191 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88