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/nla-digbench/ps4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:20:23,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:20:23,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:20:23,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:20:23,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:20:23,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:20:23,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:20:23,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:20:23,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:20:23,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:20:23,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:20:23,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:20:23,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:20:23,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:20:23,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:20:23,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:20:23,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:20:23,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:20:23,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:20:23,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:20:23,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:20:23,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:20:23,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:20:23,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:20:23,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:20:23,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:20:23,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:20:23,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:20:23,595 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 [2019-09-03 20:20:23,609 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:20:23,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:20:23,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:20:23,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:20:23,611 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:20:23,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:20:23,611 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:20:23,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:20:23,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:20:23,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:20:23,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:20:23,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:20:23,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:20:23,612 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:20:23,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:20:23,613 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:20:23,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:20:23,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:20:23,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:20:23,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:20:23,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:20:23,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:20:23,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:20:23,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:20:23,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:20:23,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:20:23,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:20:23,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:20:23,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:20:23,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:20:23,654 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:20:23,658 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:20:23,659 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:20:23,659 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:20:23,660 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps4.c [2019-09-03 20:20:23,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77374750/3c6a3bec898d478cbcc3886df040a46e/FLAG70983c2aa [2019-09-03 20:20:24,127 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:20:24,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4.c [2019-09-03 20:20:24,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77374750/3c6a3bec898d478cbcc3886df040a46e/FLAG70983c2aa [2019-09-03 20:20:24,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77374750/3c6a3bec898d478cbcc3886df040a46e [2019-09-03 20:20:24,547 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:20:24,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:20:24,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:20:24,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:20:24,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:20:24,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:20:24" (1/1) ... [2019-09-03 20:20:24,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f89b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:24, skipping insertion in model container [2019-09-03 20:20:24,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:20:24" (1/1) ... [2019-09-03 20:20:24,565 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:20:24,582 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:20:24,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:20:24,779 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:20:24,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:20:24,813 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:20:24,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:24 WrapperNode [2019-09-03 20:20:24,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:20:24,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:20:24,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:20:24,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:20:24,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:24" (1/1) ... [2019-09-03 20:20:24,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:24" (1/1) ... [2019-09-03 20:20:24,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:24" (1/1) ... [2019-09-03 20:20:24,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:24" (1/1) ... [2019-09-03 20:20:24,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:24" (1/1) ... [2019-09-03 20:20:24,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:24" (1/1) ... [2019-09-03 20:20:24,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:24" (1/1) ... [2019-09-03 20:20:24,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:20:24,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:20:24,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:20:24,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:20:24,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:24" (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 [2019-09-03 20:20:24,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:20:24,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:20:24,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:20:24,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:20:24,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:20:24,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:20:24,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:20:24,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:20:24,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:20:24,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:20:24,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:20:25,151 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:20:25,152 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:20:25,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:20:25 BoogieIcfgContainer [2019-09-03 20:20:25,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:20:25,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:20:25,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:20:25,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:20:25,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:20:24" (1/3) ... [2019-09-03 20:20:25,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228fe7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:20:25, skipping insertion in model container [2019-09-03 20:20:25,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:24" (2/3) ... [2019-09-03 20:20:25,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228fe7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:20:25, skipping insertion in model container [2019-09-03 20:20:25,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:20:25" (3/3) ... [2019-09-03 20:20:25,178 INFO L109 eAbstractionObserver]: Analyzing ICFG ps4.c [2019-09-03 20:20:25,193 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:20:25,212 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:20:25,252 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:20:25,285 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:20:25,285 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:20:25,286 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:20:25,286 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:20:25,286 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:20:25,286 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:20:25,286 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:20:25,286 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:20:25,287 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:20:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-03 20:20:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:20:25,310 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:25,310 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:25,313 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:25,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-09-03 20:20:25,318 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:25,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:25,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:25,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:25,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:20:25,423 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:20:25,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:20:25,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:20:25,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:20:25,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:20:25,444 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-03 20:20:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:25,465 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-09-03 20:20:25,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:20:25,467 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:20:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:25,475 INFO L225 Difference]: With dead ends: 37 [2019-09-03 20:20:25,476 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:20:25,478 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:20:25,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:20:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 20:20:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 20:20:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-03 20:20:25,514 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-03 20:20:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:25,514 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-03 20:20:25,515 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:20:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-03 20:20:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:20:25,516 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:25,516 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:25,517 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-09-03 20:20:25,517 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:25,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:25,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:25,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:25,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:25,524 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:25,525 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:25,525 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:20:25,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:25,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 20:20:25,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:20:25,648 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:20:25,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:20:25,649 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:20:25,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:20:25,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:20:25,650 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-03 20:20:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:25,733 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-03 20:20:25,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:20:25,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 20:20:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:25,735 INFO L225 Difference]: With dead ends: 27 [2019-09-03 20:20:25,735 INFO L226 Difference]: Without dead ends: 23 [2019-09-03 20:20:25,736 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:20:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-03 20:20:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-03 20:20:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 20:20:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-03 20:20:25,749 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-09-03 20:20:25,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:25,750 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-03 20:20:25,750 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:20:25,750 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-03 20:20:25,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 20:20:25,751 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:25,752 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:25,752 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:25,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-09-03 20:20:25,753 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:25,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:25,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:25,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:25,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:25,771 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:25,772 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:25,772 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:20:25,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:25,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:20:25,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:20:25,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:25,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:20:25,927 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:20:25,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:20:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:20:25,930 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-09-03 20:20:26,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:26,106 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-09-03 20:20:26,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:20:26,106 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-09-03 20:20:26,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:26,108 INFO L225 Difference]: With dead ends: 34 [2019-09-03 20:20:26,108 INFO L226 Difference]: Without dead ends: 31 [2019-09-03 20:20:26,109 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:20:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-03 20:20:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-03 20:20:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-03 20:20:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-09-03 20:20:26,117 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 17 [2019-09-03 20:20:26,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:26,117 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-09-03 20:20:26,118 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:20:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-09-03 20:20:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-03 20:20:26,121 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:26,121 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:26,121 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:26,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1323071607, now seen corresponding path program 1 times [2019-09-03 20:20:26,122 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:26,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:26,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:26,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:26,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:26,127 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:26,128 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:26,128 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-03 20:20:26,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:26,157 WARN L254 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-03 20:20:26,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:26,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:20:26,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:26,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:20:26,316 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:20:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:20:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:20:26,317 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 10 states. [2019-09-03 20:20:26,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:26,621 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-09-03 20:20:26,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:20:26,621 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-09-03 20:20:26,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:26,622 INFO L225 Difference]: With dead ends: 37 [2019-09-03 20:20:26,623 INFO L226 Difference]: Without dead ends: 30 [2019-09-03 20:20:26,623 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:20:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-03 20:20:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-03 20:20:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-03 20:20:26,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-09-03 20:20:26,630 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2019-09-03 20:20:26,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:26,631 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-09-03 20:20:26,631 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:20:26,631 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-09-03 20:20:26,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 20:20:26,632 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:26,632 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:26,632 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-09-03 20:20:26,633 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:26,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:26,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:26,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:26,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:26,637 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:26,638 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:26,638 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:20:26,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:20:26,670 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:20:26,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:26,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 20:20:26,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:20:26,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:26,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:20:26,767 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:20:26,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:20:26,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:20:26,768 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2019-09-03 20:20:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:26,894 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2019-09-03 20:20:26,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:20:26,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-09-03 20:20:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:26,895 INFO L225 Difference]: With dead ends: 41 [2019-09-03 20:20:26,895 INFO L226 Difference]: Without dead ends: 38 [2019-09-03 20:20:26,896 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:20:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-03 20:20:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-03 20:20:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 20:20:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-09-03 20:20:26,904 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2019-09-03 20:20:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:26,904 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-09-03 20:20:26,905 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:20:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-09-03 20:20:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-03 20:20:26,906 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:26,906 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:26,906 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash 450416527, now seen corresponding path program 2 times [2019-09-03 20:20:26,907 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:26,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:26,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:26,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:26,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:26,911 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:26,912 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:26,912 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:20:26,933 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:20:26,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:20:26,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:26,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 20:20:26,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:27,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 20:20:27,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:27,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:20:27,077 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:20:27,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:20:27,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:20:27,078 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2019-09-03 20:20:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:27,480 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-09-03 20:20:27,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:20:27,487 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-09-03 20:20:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:27,488 INFO L225 Difference]: With dead ends: 44 [2019-09-03 20:20:27,488 INFO L226 Difference]: Without dead ends: 37 [2019-09-03 20:20:27,488 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:20:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-03 20:20:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-03 20:20:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-03 20:20:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-09-03 20:20:27,496 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2019-09-03 20:20:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:27,496 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-09-03 20:20:27,497 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:20:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-09-03 20:20:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-03 20:20:27,498 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:27,498 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:27,498 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:27,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:27,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-09-03 20:20:27,499 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:27,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:27,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:27,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:27,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:27,503 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:27,503 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:27,503 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:20:27,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:20:27,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:20:27,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:27,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:20:27,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:27,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-03 20:20:27,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:27,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-03 20:20:27,672 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:20:27,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:20:27,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:20:27,673 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2019-09-03 20:20:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:27,794 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-09-03 20:20:27,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:20:27,795 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-09-03 20:20:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:27,796 INFO L225 Difference]: With dead ends: 43 [2019-09-03 20:20:27,796 INFO L226 Difference]: Without dead ends: 38 [2019-09-03 20:20:27,797 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:20:27,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-03 20:20:27,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-03 20:20:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 20:20:27,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-09-03 20:20:27,805 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 31 [2019-09-03 20:20:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:27,806 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-09-03 20:20:27,806 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:20:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-09-03 20:20:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:20:27,807 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:27,807 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:27,807 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:27,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1589169527, now seen corresponding path program 3 times [2019-09-03 20:20:27,808 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:27,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:27,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:27,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:27,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:27,813 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:27,813 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:27,813 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:20:27,829 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:20:27,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:20:27,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:27,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-03 20:20:27,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:27,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:20:28,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:28,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-03 20:20:28,014 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:20:28,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:20:28,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:20:28,016 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 12 states. [2019-09-03 20:20:28,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:28,179 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2019-09-03 20:20:28,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:20:28,180 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-09-03 20:20:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:28,181 INFO L225 Difference]: With dead ends: 46 [2019-09-03 20:20:28,181 INFO L226 Difference]: Without dead ends: 41 [2019-09-03 20:20:28,182 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:20:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-03 20:20:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-03 20:20:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 20:20:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-09-03 20:20:28,189 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2019-09-03 20:20:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:28,190 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-09-03 20:20:28,190 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:20:28,190 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-09-03 20:20:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-03 20:20:28,191 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:28,191 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:28,192 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:28,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:28,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2137184911, now seen corresponding path program 4 times [2019-09-03 20:20:28,192 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:28,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:28,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:28,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:28,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:28,197 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:28,197 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:28,197 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:20:28,221 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:20:28,251 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:20:28,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:28,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 52 conjunts are in the unsatisfiable core [2019-09-03 20:20:28,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:28,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-03 20:20:28,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:28,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:20:28,487 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:20:28,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:20:28,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:20:28,488 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 13 states. [2019-09-03 20:20:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:28,705 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2019-09-03 20:20:28,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 20:20:28,706 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-09-03 20:20:28,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:28,707 INFO L225 Difference]: With dead ends: 53 [2019-09-03 20:20:28,707 INFO L226 Difference]: Without dead ends: 48 [2019-09-03 20:20:28,707 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:20:28,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-03 20:20:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-03 20:20:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 20:20:28,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-09-03 20:20:28,716 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2019-09-03 20:20:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:28,716 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-09-03 20:20:28,716 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:20:28,717 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-09-03 20:20:28,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-03 20:20:28,718 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:28,718 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:28,718 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:28,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1474060919, now seen corresponding path program 5 times [2019-09-03 20:20:28,719 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:28,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:28,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:28,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:28,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:28,723 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:28,723 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:28,723 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:28,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:28,783 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-03 20:20:28,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:28,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-03 20:20:28,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:28,905 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-03 20:20:28,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:28,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:20:28,942 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:20:28,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:20:28,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:20:28,943 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2019-09-03 20:20:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:29,172 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-09-03 20:20:29,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:20:29,173 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-09-03 20:20:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:29,174 INFO L225 Difference]: With dead ends: 56 [2019-09-03 20:20:29,174 INFO L226 Difference]: Without dead ends: 51 [2019-09-03 20:20:29,175 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:20:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-03 20:20:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-03 20:20:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-03 20:20:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-09-03 20:20:29,188 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 51 [2019-09-03 20:20:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:29,188 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-09-03 20:20:29,189 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:20:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-09-03 20:20:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-03 20:20:29,193 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:29,193 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:29,193 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:29,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:29,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1744984689, now seen corresponding path program 6 times [2019-09-03 20:20:29,194 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:29,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:29,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:29,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:29,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:29,208 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:29,209 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:29,209 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:29,244 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:20:29,307 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 20:20:29,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:29,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-03 20:20:29,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:29,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-03 20:20:29,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:29,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:20:29,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:20:29,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:20:29,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:20:29,495 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2019-09-03 20:20:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:29,732 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2019-09-03 20:20:29,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:20:29,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-09-03 20:20:29,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:29,734 INFO L225 Difference]: With dead ends: 59 [2019-09-03 20:20:29,734 INFO L226 Difference]: Without dead ends: 54 [2019-09-03 20:20:29,734 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:20:29,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-03 20:20:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-03 20:20:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-03 20:20:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2019-09-03 20:20:29,743 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 58 [2019-09-03 20:20:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:29,743 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2019-09-03 20:20:29,743 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:20:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2019-09-03 20:20:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-03 20:20:29,745 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:29,745 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:29,745 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash -862505097, now seen corresponding path program 7 times [2019-09-03 20:20:29,746 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:29,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:29,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:29,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:29,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:29,751 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:29,751 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:29,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:29,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:29,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 65 conjunts are in the unsatisfiable core [2019-09-03 20:20:29,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:30,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 32 proven. 104 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-09-03 20:20:30,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:30,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-03 20:20:30,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:20:30,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:20:30,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:20:30,069 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 16 states. [2019-09-03 20:20:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:30,405 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2019-09-03 20:20:30,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:20:30,405 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-09-03 20:20:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:30,406 INFO L225 Difference]: With dead ends: 66 [2019-09-03 20:20:30,407 INFO L226 Difference]: Without dead ends: 61 [2019-09-03 20:20:30,407 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:20:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-03 20:20:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-03 20:20:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-03 20:20:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2019-09-03 20:20:30,416 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 65 [2019-09-03 20:20:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:30,417 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2019-09-03 20:20:30,417 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:20:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2019-09-03 20:20:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-03 20:20:30,418 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:30,418 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:30,418 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:30,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1738985329, now seen corresponding path program 8 times [2019-09-03 20:20:30,419 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:30,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:30,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:30,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:30,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:30,423 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:30,424 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:30,424 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:30,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:30,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:20:30,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:30,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 66 conjunts are in the unsatisfiable core [2019-09-03 20:20:30,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:30,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 41 proven. 109 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-09-03 20:20:30,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:30,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-03 20:20:30,754 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 20:20:30,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 20:20:30,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:20:30,755 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 17 states. [2019-09-03 20:20:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:31,125 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2019-09-03 20:20:31,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:20:31,126 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2019-09-03 20:20:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:31,127 INFO L225 Difference]: With dead ends: 73 [2019-09-03 20:20:31,127 INFO L226 Difference]: Without dead ends: 68 [2019-09-03 20:20:31,127 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:20:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-03 20:20:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-03 20:20:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-03 20:20:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2019-09-03 20:20:31,137 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 72 [2019-09-03 20:20:31,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:31,137 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2019-09-03 20:20:31,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 20:20:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2019-09-03 20:20:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-03 20:20:31,139 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:31,139 INFO L399 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:31,139 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:31,140 INFO L82 PathProgramCache]: Analyzing trace with hash 54086775, now seen corresponding path program 9 times [2019-09-03 20:20:31,140 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:31,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:31,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:31,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:31,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:31,144 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:31,144 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:31,144 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:31,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:20:31,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-03 20:20:31,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:31,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-03 20:20:31,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:31,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 19 proven. 163 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-09-03 20:20:31,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:31,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-03 20:20:31,603 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:20:31,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:20:31,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:20:31,604 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 18 states. [2019-09-03 20:20:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:32,043 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2019-09-03 20:20:32,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:20:32,043 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-09-03 20:20:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:32,045 INFO L225 Difference]: With dead ends: 76 [2019-09-03 20:20:32,045 INFO L226 Difference]: Without dead ends: 71 [2019-09-03 20:20:32,046 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:20:32,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-03 20:20:32,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-03 20:20:32,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-03 20:20:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-09-03 20:20:32,055 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 79 [2019-09-03 20:20:32,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:32,055 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-09-03 20:20:32,056 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:20:32,056 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-09-03 20:20:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-03 20:20:32,057 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:32,058 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:32,058 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:32,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2145027185, now seen corresponding path program 10 times [2019-09-03 20:20:32,058 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:32,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:32,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:32,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:32,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:32,064 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:32,064 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:32,064 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:32,096 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:32,157 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:20:32,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:32,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 78 conjunts are in the unsatisfiable core [2019-09-03 20:20:32,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:32,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 52 proven. 207 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-09-03 20:20:32,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:32,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-03 20:20:32,661 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:20:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:20:32,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:20:32,662 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 20 states. [2019-09-03 20:20:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:33,126 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2019-09-03 20:20:33,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:20:33,126 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 86 [2019-09-03 20:20:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:33,128 INFO L225 Difference]: With dead ends: 83 [2019-09-03 20:20:33,128 INFO L226 Difference]: Without dead ends: 78 [2019-09-03 20:20:33,128 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:20:33,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-03 20:20:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-03 20:20:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-03 20:20:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2019-09-03 20:20:33,152 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 86 [2019-09-03 20:20:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:33,152 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2019-09-03 20:20:33,153 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:20:33,153 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2019-09-03 20:20:33,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-03 20:20:33,154 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:33,154 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:33,154 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:33,154 INFO L82 PathProgramCache]: Analyzing trace with hash -166551177, now seen corresponding path program 11 times [2019-09-03 20:20:33,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:33,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:33,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:33,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:33,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:33,159 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:33,159 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:33,159 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:33,178 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:20:33,257 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-03 20:20:33,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:33,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 60 conjunts are in the unsatisfiable core [2019-09-03 20:20:33,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:33,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 29 proven. 226 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-03 20:20:33,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:33,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-03 20:20:33,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:20:33,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:20:33,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:20:33,493 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 19 states. [2019-09-03 20:20:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:33,881 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2019-09-03 20:20:33,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:20:33,881 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 93 [2019-09-03 20:20:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:33,882 INFO L225 Difference]: With dead ends: 86 [2019-09-03 20:20:33,883 INFO L226 Difference]: Without dead ends: 81 [2019-09-03 20:20:33,883 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:20:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-03 20:20:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-03 20:20:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-03 20:20:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2019-09-03 20:20:33,896 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 93 [2019-09-03 20:20:33,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:33,896 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2019-09-03 20:20:33,896 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:20:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2019-09-03 20:20:33,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-03 20:20:33,898 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:33,899 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:33,899 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:33,899 INFO L82 PathProgramCache]: Analyzing trace with hash 454198927, now seen corresponding path program 12 times [2019-09-03 20:20:33,899 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:33,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:33,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:33,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:33,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:33,907 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:33,907 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:33,908 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:33,927 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:20:34,025 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-03 20:20:34,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:34,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 66 conjunts are in the unsatisfiable core [2019-09-03 20:20:34,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:34,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 25 proven. 271 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-09-03 20:20:34,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:34,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-03 20:20:34,288 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:20:34,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:20:34,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:20:34,297 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 21 states. [2019-09-03 20:20:34,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:34,793 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2019-09-03 20:20:34,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:20:34,794 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2019-09-03 20:20:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:34,795 INFO L225 Difference]: With dead ends: 89 [2019-09-03 20:20:34,796 INFO L226 Difference]: Without dead ends: 84 [2019-09-03 20:20:34,796 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:20:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-03 20:20:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-03 20:20:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-03 20:20:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2019-09-03 20:20:34,807 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 100 [2019-09-03 20:20:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:34,807 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2019-09-03 20:20:34,807 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:20:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2019-09-03 20:20:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-03 20:20:34,809 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:34,809 INFO L399 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:34,809 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:34,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:34,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1400059511, now seen corresponding path program 13 times [2019-09-03 20:20:34,809 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:34,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:34,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:34,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:34,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:34,814 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:34,814 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:34,814 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:34,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:34,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 101 conjunts are in the unsatisfiable core [2019-09-03 20:20:34,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:35,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 62 proven. 311 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-09-03 20:20:35,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:35,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-03 20:20:35,360 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 20:20:35,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 20:20:35,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:20:35,361 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 22 states. [2019-09-03 20:20:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:35,998 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2019-09-03 20:20:35,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 20:20:35,998 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2019-09-03 20:20:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:35,999 INFO L225 Difference]: With dead ends: 96 [2019-09-03 20:20:35,999 INFO L226 Difference]: Without dead ends: 91 [2019-09-03 20:20:36,000 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:20:36,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-03 20:20:36,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-03 20:20:36,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-03 20:20:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2019-09-03 20:20:36,013 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 107 [2019-09-03 20:20:36,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:36,013 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2019-09-03 20:20:36,013 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 20:20:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2019-09-03 20:20:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-03 20:20:36,015 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:36,015 INFO L399 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:36,015 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:36,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:36,016 INFO L82 PathProgramCache]: Analyzing trace with hash 13652367, now seen corresponding path program 14 times [2019-09-03 20:20:36,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:36,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:36,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:36,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:36,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:36,020 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:36,020 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:36,020 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:36,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:20:36,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:20:36,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:36,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 102 conjunts are in the unsatisfiable core [2019-09-03 20:20:36,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:36,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 71 proven. 316 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-09-03 20:20:36,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:36,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-03 20:20:36,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:20:36,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:20:36,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:20:36,574 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 23 states. [2019-09-03 20:20:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:37,239 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2019-09-03 20:20:37,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:20:37,240 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2019-09-03 20:20:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:37,242 INFO L225 Difference]: With dead ends: 103 [2019-09-03 20:20:37,242 INFO L226 Difference]: Without dead ends: 98 [2019-09-03 20:20:37,243 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:20:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-03 20:20:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-03 20:20:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-03 20:20:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2019-09-03 20:20:37,255 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 114 [2019-09-03 20:20:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:37,255 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2019-09-03 20:20:37,255 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:20:37,255 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2019-09-03 20:20:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-03 20:20:37,257 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:37,257 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:37,257 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:37,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2108361591, now seen corresponding path program 15 times [2019-09-03 20:20:37,258 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:37,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:37,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:37,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:37,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:37,262 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:37,262 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:37,262 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:37,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:37,424 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-03 20:20:37,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:37,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 78 conjunts are in the unsatisfiable core [2019-09-03 20:20:37,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:37,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 31 proven. 406 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-09-03 20:20:37,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:37,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 20:20:37,780 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:20:37,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:20:37,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:20:37,781 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 24 states. [2019-09-03 20:20:38,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:38,446 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2019-09-03 20:20:38,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:20:38,446 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2019-09-03 20:20:38,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:38,448 INFO L225 Difference]: With dead ends: 106 [2019-09-03 20:20:38,449 INFO L226 Difference]: Without dead ends: 101 [2019-09-03 20:20:38,450 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:20:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-03 20:20:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-09-03 20:20:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-03 20:20:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2019-09-03 20:20:38,460 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 121 [2019-09-03 20:20:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:38,461 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2019-09-03 20:20:38,461 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:20:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2019-09-03 20:20:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-03 20:20:38,462 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:38,462 INFO L399 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:38,463 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:38,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1794188145, now seen corresponding path program 16 times [2019-09-03 20:20:38,463 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:38,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:38,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:38,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:38,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:38,467 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:38,468 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:38,468 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:38,481 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:20:38,531 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:20:38,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:38,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 110 conjunts are in the unsatisfiable core [2019-09-03 20:20:38,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:39,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 88 proven. 480 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2019-09-03 20:20:39,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:39,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-03 20:20:39,131 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-03 20:20:39,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-03 20:20:39,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:20:39,132 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 26 states. [2019-09-03 20:20:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:39,981 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2019-09-03 20:20:39,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-03 20:20:39,982 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 128 [2019-09-03 20:20:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:39,983 INFO L225 Difference]: With dead ends: 117 [2019-09-03 20:20:39,983 INFO L226 Difference]: Without dead ends: 112 [2019-09-03 20:20:39,987 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2019-09-03 20:20:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-03 20:20:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-09-03 20:20:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-03 20:20:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2019-09-03 20:20:40,005 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 128 [2019-09-03 20:20:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:40,006 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2019-09-03 20:20:40,006 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-03 20:20:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2019-09-03 20:20:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-03 20:20:40,010 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:40,011 INFO L399 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:40,011 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:40,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1962270601, now seen corresponding path program 17 times [2019-09-03 20:20:40,012 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:40,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:40,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:40,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:40,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:40,032 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:40,032 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:40,033 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:40,075 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:20:40,907 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-03 20:20:40,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:40,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 84 conjunts are in the unsatisfiable core [2019-09-03 20:20:40,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:41,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 41 proven. 505 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-09-03 20:20:41,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:41,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-03 20:20:41,396 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 20:20:41,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 20:20:41,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:20:41,397 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand 25 states. [2019-09-03 20:20:42,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:42,143 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2019-09-03 20:20:42,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-03 20:20:42,146 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 135 [2019-09-03 20:20:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:42,147 INFO L225 Difference]: With dead ends: 120 [2019-09-03 20:20:42,147 INFO L226 Difference]: Without dead ends: 115 [2019-09-03 20:20:42,148 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:20:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-03 20:20:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-09-03 20:20:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-09-03 20:20:42,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 122 transitions. [2019-09-03 20:20:42,159 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 122 transitions. Word has length 135 [2019-09-03 20:20:42,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:42,159 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 122 transitions. [2019-09-03 20:20:42,159 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 20:20:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 122 transitions. [2019-09-03 20:20:42,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-03 20:20:42,161 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:42,161 INFO L399 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:42,161 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:42,161 INFO L82 PathProgramCache]: Analyzing trace with hash 125708175, now seen corresponding path program 18 times [2019-09-03 20:20:42,161 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:42,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:42,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:42,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:42,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:42,166 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:42,166 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:42,166 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:42,176 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:20:42,338 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-03 20:20:42,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:42,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 90 conjunts are in the unsatisfiable core [2019-09-03 20:20:42,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:42,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 37 proven. 568 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Exception during sending of exit command (exit): Stream closed [2019-09-03 20:20:42,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:42,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-03 20:20:42,814 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 20:20:42,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 20:20:42,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:20:42,815 INFO L87 Difference]: Start difference. First operand 115 states and 122 transitions. Second operand 27 states. [2019-09-03 20:20:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:43,742 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2019-09-03 20:20:43,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-03 20:20:43,743 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 142 [2019-09-03 20:20:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:43,744 INFO L225 Difference]: With dead ends: 123 [2019-09-03 20:20:43,745 INFO L226 Difference]: Without dead ends: 118 [2019-09-03 20:20:43,746 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:20:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-09-03 20:20:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-09-03 20:20:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-03 20:20:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2019-09-03 20:20:43,769 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 142 [2019-09-03 20:20:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:43,769 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2019-09-03 20:20:43,770 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 20:20:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2019-09-03 20:20:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-03 20:20:43,773 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:43,773 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:43,774 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1172338039, now seen corresponding path program 19 times [2019-09-03 20:20:43,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:43,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:43,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:43,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:43,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:43,788 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:43,789 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:43,789 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:43,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:43,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 137 conjunts are in the unsatisfiable core [2019-09-03 20:20:43,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:44,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 92 proven. 626 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2019-09-03 20:20:44,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:44,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-03 20:20:44,608 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 20:20:44,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 20:20:44,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:20:44,609 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand 28 states. [2019-09-03 20:20:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:45,677 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2019-09-03 20:20:45,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-03 20:20:45,677 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 149 [2019-09-03 20:20:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:45,679 INFO L225 Difference]: With dead ends: 130 [2019-09-03 20:20:45,679 INFO L226 Difference]: Without dead ends: 125 [2019-09-03 20:20:45,680 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2019-09-03 20:20:45,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-09-03 20:20:45,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-09-03 20:20:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-09-03 20:20:45,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2019-09-03 20:20:45,695 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 149 [2019-09-03 20:20:45,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:45,695 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2019-09-03 20:20:45,696 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 20:20:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2019-09-03 20:20:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-03 20:20:45,697 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:45,697 INFO L399 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:45,698 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:45,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1406022287, now seen corresponding path program 20 times [2019-09-03 20:20:45,698 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:45,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:45,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:45,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:45,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:45,703 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:45,704 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:45,704 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:45,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:20:45,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:20:45,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:45,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 138 conjunts are in the unsatisfiable core [2019-09-03 20:20:45,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:46,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 101 proven. 631 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-09-03 20:20:46,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:46,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-03 20:20:46,530 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-03 20:20:46,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-03 20:20:46,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-03 20:20:46,531 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand 29 states. [2019-09-03 20:20:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:47,650 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2019-09-03 20:20:47,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-03 20:20:47,651 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 156 [2019-09-03 20:20:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:47,652 INFO L225 Difference]: With dead ends: 137 [2019-09-03 20:20:47,653 INFO L226 Difference]: Without dead ends: 132 [2019-09-03 20:20:47,653 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2019-09-03 20:20:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-03 20:20:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2019-09-03 20:20:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-03 20:20:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2019-09-03 20:20:47,667 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 156 [2019-09-03 20:20:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:47,668 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2019-09-03 20:20:47,668 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-03 20:20:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2019-09-03 20:20:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-03 20:20:47,669 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:47,669 INFO L399 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:47,669 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:47,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:47,670 INFO L82 PathProgramCache]: Analyzing trace with hash 746457719, now seen corresponding path program 21 times [2019-09-03 20:20:47,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:47,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:47,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:47,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:47,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:47,674 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:47,674 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:47,675 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:47,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:48,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-03 20:20:48,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:48,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 102 conjunts are in the unsatisfiable core [2019-09-03 20:20:48,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:48,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 43 proven. 757 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:20:48,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:48,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-03 20:20:48,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 20:20:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 20:20:48,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:20:48,574 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand 30 states. [2019-09-03 20:20:49,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:49,586 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2019-09-03 20:20:49,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-03 20:20:49,587 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 163 [2019-09-03 20:20:49,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:49,588 INFO L225 Difference]: With dead ends: 140 [2019-09-03 20:20:49,588 INFO L226 Difference]: Without dead ends: 135 [2019-09-03 20:20:49,589 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 20:20:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-09-03 20:20:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2019-09-03 20:20:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-03 20:20:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2019-09-03 20:20:49,605 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 163 [2019-09-03 20:20:49,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:49,606 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2019-09-03 20:20:49,606 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 20:20:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2019-09-03 20:20:49,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-03 20:20:49,608 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:49,609 INFO L399 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:49,609 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1101987215, now seen corresponding path program 22 times [2019-09-03 20:20:49,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:49,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:49,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:49,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:49,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:49,615 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:49,615 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:49,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:49,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:49,815 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:20:49,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:49,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-03 20:20:49,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:50,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 45 proven. 826 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2019-09-03 20:20:50,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:50,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-03 20:20:50,735 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 20:20:50,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 20:20:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:20:50,736 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand 30 states. [2019-09-03 20:20:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:51,986 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2019-09-03 20:20:51,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-03 20:20:51,988 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 170 [2019-09-03 20:20:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:51,990 INFO L225 Difference]: With dead ends: 143 [2019-09-03 20:20:51,990 INFO L226 Difference]: Without dead ends: 138 [2019-09-03 20:20:51,991 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 20:20:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-09-03 20:20:52,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2019-09-03 20:20:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-09-03 20:20:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2019-09-03 20:20:52,004 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 170 [2019-09-03 20:20:52,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:52,005 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2019-09-03 20:20:52,005 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 20:20:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2019-09-03 20:20:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-03 20:20:52,006 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:52,006 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:52,006 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:52,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1899159415, now seen corresponding path program 23 times [2019-09-03 20:20:52,007 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:52,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:52,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:52,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:52,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:52,011 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:52,012 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:52,012 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:52,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:20:52,535 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-03 20:20:52,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:52,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 108 conjunts are in the unsatisfiable core [2019-09-03 20:20:52,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:53,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 56 proven. 889 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2019-09-03 20:20:53,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:53,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-03 20:20:53,235 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-03 20:20:53,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-03 20:20:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2019-09-03 20:20:53,236 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 31 states. [2019-09-03 20:20:54,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:54,352 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2019-09-03 20:20:54,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-03 20:20:54,352 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 177 [2019-09-03 20:20:54,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:54,354 INFO L225 Difference]: With dead ends: 146 [2019-09-03 20:20:54,355 INFO L226 Difference]: Without dead ends: 141 [2019-09-03 20:20:54,356 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:20:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-09-03 20:20:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2019-09-03 20:20:54,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-09-03 20:20:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2019-09-03 20:20:54,369 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 177 [2019-09-03 20:20:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:54,370 INFO L475 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2019-09-03 20:20:54,370 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-03 20:20:54,370 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2019-09-03 20:20:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-03 20:20:54,371 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:54,371 INFO L399 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:54,372 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:54,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:54,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1691388047, now seen corresponding path program 24 times [2019-09-03 20:20:54,372 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:54,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:54,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:54,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:54,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:54,377 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:54,377 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:54,377 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:54,395 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:20:54,729 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-03 20:20:54,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:54,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 114 conjunts are in the unsatisfiable core [2019-09-03 20:20:54,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:55,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 49 proven. 973 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2019-09-03 20:20:55,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:55,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-03 20:20:55,333 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-03 20:20:55,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-03 20:20:55,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 20:20:55,334 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 33 states. [2019-09-03 20:20:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:56,560 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2019-09-03 20:20:56,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-03 20:20:56,561 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 184 [2019-09-03 20:20:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:56,562 INFO L225 Difference]: With dead ends: 149 [2019-09-03 20:20:56,562 INFO L226 Difference]: Without dead ends: 144 [2019-09-03 20:20:56,564 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:20:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-09-03 20:20:56,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2019-09-03 20:20:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-03 20:20:56,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2019-09-03 20:20:56,577 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 184 [2019-09-03 20:20:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:56,578 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2019-09-03 20:20:56,578 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-03 20:20:56,578 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2019-09-03 20:20:56,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-03 20:20:56,579 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:56,579 INFO L399 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:56,580 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:56,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:56,580 INFO L82 PathProgramCache]: Analyzing trace with hash -95488905, now seen corresponding path program 25 times [2019-09-03 20:20:56,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:56,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:56,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:56,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:56,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:56,585 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:56,585 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:56,585 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:56,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:56,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 173 conjunts are in the unsatisfiable core [2019-09-03 20:20:56,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:57,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 122 proven. 1049 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2019-09-03 20:20:57,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:57,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-03 20:20:57,751 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-03 20:20:57,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-03 20:20:57,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:20:57,752 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand 34 states. [2019-09-03 20:20:59,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:59,407 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2019-09-03 20:20:59,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-03 20:20:59,408 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 191 [2019-09-03 20:20:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:59,409 INFO L225 Difference]: With dead ends: 156 [2019-09-03 20:20:59,410 INFO L226 Difference]: Without dead ends: 151 [2019-09-03 20:20:59,411 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 20:20:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-03 20:20:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-09-03 20:20:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-03 20:20:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2019-09-03 20:20:59,425 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 191 [2019-09-03 20:20:59,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:59,426 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2019-09-03 20:20:59,426 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-03 20:20:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2019-09-03 20:20:59,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-09-03 20:20:59,427 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:59,427 INFO L399 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:59,428 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:59,428 INFO L82 PathProgramCache]: Analyzing trace with hash 484627343, now seen corresponding path program 26 times [2019-09-03 20:20:59,428 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:59,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:59,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:59,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:59,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:59,433 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:59,433 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:59,433 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:59,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:20:59,523 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:20:59,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:59,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 174 conjunts are in the unsatisfiable core [2019-09-03 20:20:59,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:00,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 131 proven. 1054 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2019-09-03 20:21:00,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:00,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-03 20:21:00,512 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-03 20:21:00,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-03 20:21:00,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 20:21:00,513 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand 35 states. [2019-09-03 20:21:02,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:02,443 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-09-03 20:21:02,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-03 20:21:02,443 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 198 [2019-09-03 20:21:02,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:02,445 INFO L225 Difference]: With dead ends: 163 [2019-09-03 20:21:02,445 INFO L226 Difference]: Without dead ends: 158 [2019-09-03 20:21:02,446 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1321, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:21:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-09-03 20:21:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2019-09-03 20:21:02,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-09-03 20:21:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 170 transitions. [2019-09-03 20:21:02,462 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 170 transitions. Word has length 198 [2019-09-03 20:21:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:02,463 INFO L475 AbstractCegarLoop]: Abstraction has 158 states and 170 transitions. [2019-09-03 20:21:02,463 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-03 20:21:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 170 transitions. [2019-09-03 20:21:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-09-03 20:21:02,464 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:02,464 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:02,465 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:02,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1646414199, now seen corresponding path program 27 times [2019-09-03 20:21:02,465 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:02,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:02,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:02,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:02,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:02,470 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:02,471 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:02,471 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:21:02,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:03,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-09-03 20:21:03,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:03,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 126 conjunts are in the unsatisfiable core [2019-09-03 20:21:03,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:04,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 55 proven. 1216 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2019-09-03 20:21:04,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:04,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-03 20:21:04,755 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-03 20:21:04,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-03 20:21:04,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:21:04,756 INFO L87 Difference]: Start difference. First operand 158 states and 170 transitions. Second operand 36 states. [2019-09-03 20:21:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:06,252 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2019-09-03 20:21:06,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-03 20:21:06,253 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 205 [2019-09-03 20:21:06,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:06,255 INFO L225 Difference]: With dead ends: 166 [2019-09-03 20:21:06,255 INFO L226 Difference]: Without dead ends: 161 [2019-09-03 20:21:06,256 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=86, Invalid=1396, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 20:21:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-09-03 20:21:06,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2019-09-03 20:21:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-03 20:21:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2019-09-03 20:21:06,277 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 205 [2019-09-03 20:21:06,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:06,278 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2019-09-03 20:21:06,278 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-03 20:21:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2019-09-03 20:21:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-09-03 20:21:06,280 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:06,280 INFO L399 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:06,281 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:06,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1785340273, now seen corresponding path program 28 times [2019-09-03 20:21:06,282 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:06,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:06,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:06,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:06,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:06,289 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:06,290 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:06,290 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:06,309 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:21:19,329 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:21:19,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:19,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 128 conjunts are in the unsatisfiable core [2019-09-03 20:21:19,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:19,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 57 proven. 1303 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2019-09-03 20:21:19,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:19,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-03 20:21:19,971 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-03 20:21:19,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-03 20:21:19,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:21:19,972 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 36 states. [2019-09-03 20:21:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:21,549 INFO L93 Difference]: Finished difference Result 169 states and 183 transitions. [2019-09-03 20:21:21,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-03 20:21:21,550 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 212 [2019-09-03 20:21:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:21,552 INFO L225 Difference]: With dead ends: 169 [2019-09-03 20:21:21,552 INFO L226 Difference]: Without dead ends: 164 [2019-09-03 20:21:21,553 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 20:21:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-03 20:21:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2019-09-03 20:21:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-03 20:21:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2019-09-03 20:21:21,569 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 212 [2019-09-03 20:21:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:21,570 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2019-09-03 20:21:21,570 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-03 20:21:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2019-09-03 20:21:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-03 20:21:21,571 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:21,571 INFO L399 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:21,572 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:21,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:21,572 INFO L82 PathProgramCache]: Analyzing trace with hash -151200137, now seen corresponding path program 29 times [2019-09-03 20:21:21,572 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:21,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:21,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:21,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:21,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:21,577 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:21,578 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:21,578 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:21:21,598 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:28,407 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-09-03 20:21:28,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:28,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 132 conjunts are in the unsatisfiable core [2019-09-03 20:21:28,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:29,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 71 proven. 1381 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:21:29,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:29,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-09-03 20:21:29,198 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-03 20:21:29,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-03 20:21:29,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 20:21:29,199 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand 37 states. [2019-09-03 20:21:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:30,769 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2019-09-03 20:21:30,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-03 20:21:30,770 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 219 [2019-09-03 20:21:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:30,772 INFO L225 Difference]: With dead ends: 172 [2019-09-03 20:21:30,773 INFO L226 Difference]: Without dead ends: 167 [2019-09-03 20:21:30,774 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 20:21:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-09-03 20:21:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2019-09-03 20:21:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-09-03 20:21:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 182 transitions. [2019-09-03 20:21:30,789 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 182 transitions. Word has length 219 [2019-09-03 20:21:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:30,790 INFO L475 AbstractCegarLoop]: Abstraction has 167 states and 182 transitions. [2019-09-03 20:21:30,790 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-03 20:21:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 182 transitions. [2019-09-03 20:21:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-09-03 20:21:30,791 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:30,792 INFO L399 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:30,792 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash -963008113, now seen corresponding path program 30 times [2019-09-03 20:21:30,792 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:30,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:30,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:30,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:30,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:30,798 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:30,798 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:30,798 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:21:30,816 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:31,624 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-03 20:21:31,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:31,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 138 conjunts are in the unsatisfiable core [2019-09-03 20:21:31,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:32,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 61 proven. 1486 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-09-03 20:21:32,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:32,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-09-03 20:21:32,349 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-03 20:21:32,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-03 20:21:32,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 20:21:32,350 INFO L87 Difference]: Start difference. First operand 167 states and 182 transitions. Second operand 39 states. [2019-09-03 20:21:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:34,320 INFO L93 Difference]: Finished difference Result 175 states and 191 transitions. [2019-09-03 20:21:34,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-03 20:21:34,321 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 226 [2019-09-03 20:21:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:34,322 INFO L225 Difference]: With dead ends: 175 [2019-09-03 20:21:34,323 INFO L226 Difference]: Without dead ends: 170 [2019-09-03 20:21:34,324 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=1630, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 20:21:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-09-03 20:21:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2019-09-03 20:21:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-09-03 20:21:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 186 transitions. [2019-09-03 20:21:34,337 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 186 transitions. Word has length 226 [2019-09-03 20:21:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:34,337 INFO L475 AbstractCegarLoop]: Abstraction has 170 states and 186 transitions. [2019-09-03 20:21:34,337 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-03 20:21:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 186 transitions. [2019-09-03 20:21:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-03 20:21:34,339 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:34,339 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:34,339 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:34,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1154567305, now seen corresponding path program 31 times [2019-09-03 20:21:34,340 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:34,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:34,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:34,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:34,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:34,345 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:34,345 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:34,345 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:21:34,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:21:34,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 209 conjunts are in the unsatisfiable core [2019-09-03 20:21:34,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:35,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 152 proven. 1580 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2019-09-03 20:21:35,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:35,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-03 20:21:35,763 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-03 20:21:35,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-03 20:21:35,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 20:21:35,764 INFO L87 Difference]: Start difference. First operand 170 states and 186 transitions. Second operand 40 states. [2019-09-03 20:21:38,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:38,645 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2019-09-03 20:21:38,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-03 20:21:38,646 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 233 [2019-09-03 20:21:38,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:38,647 INFO L225 Difference]: With dead ends: 182 [2019-09-03 20:21:38,648 INFO L226 Difference]: Without dead ends: 177 [2019-09-03 20:21:38,649 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=1711, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 20:21:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-09-03 20:21:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2019-09-03 20:21:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-03 20:21:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 193 transitions. [2019-09-03 20:21:38,665 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 193 transitions. Word has length 233 [2019-09-03 20:21:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:38,666 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 193 transitions. [2019-09-03 20:21:38,666 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-03 20:21:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 193 transitions. [2019-09-03 20:21:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-09-03 20:21:38,667 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:38,668 INFO L399 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:38,668 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1939747983, now seen corresponding path program 32 times [2019-09-03 20:21:38,668 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:38,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:38,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:38,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:38,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:38,674 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:38,674 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:38,674 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:38,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:21:38,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:21:38,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:38,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 144 conjunts are in the unsatisfiable core [2019-09-03 20:21:38,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:39,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 161 proven. 1585 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2019-09-03 20:21:39,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:39,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-03 20:21:39,594 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-03 20:21:39,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-03 20:21:39,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 20:21:39,595 INFO L87 Difference]: Start difference. First operand 177 states and 193 transitions. Second operand 40 states. [2019-09-03 20:21:41,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:41,531 INFO L93 Difference]: Finished difference Result 185 states and 202 transitions. [2019-09-03 20:21:41,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-03 20:21:41,532 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 240 [2019-09-03 20:21:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:41,534 INFO L225 Difference]: With dead ends: 185 [2019-09-03 20:21:41,534 INFO L226 Difference]: Without dead ends: 180 [2019-09-03 20:21:41,536 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=1713, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 20:21:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-09-03 20:21:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2019-09-03 20:21:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-09-03 20:21:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 197 transitions. [2019-09-03 20:21:41,551 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 197 transitions. Word has length 240 [2019-09-03 20:21:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:41,552 INFO L475 AbstractCegarLoop]: Abstraction has 180 states and 197 transitions. [2019-09-03 20:21:41,552 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-03 20:21:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 197 transitions. [2019-09-03 20:21:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-09-03 20:21:41,553 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:41,554 INFO L399 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:41,554 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1695008887, now seen corresponding path program 33 times [2019-09-03 20:21:41,554 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:41,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:41,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:41,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:41,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:41,560 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:41,560 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:41,560 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:41,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:22:07,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-09-03 20:22:07,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:07,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 150 conjunts are in the unsatisfiable core [2019-09-03 20:22:07,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:07,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 67 proven. 1783 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2019-09-03 20:22:07,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:07,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-09-03 20:22:07,975 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-03 20:22:07,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-03 20:22:07,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 20:22:07,976 INFO L87 Difference]: Start difference. First operand 180 states and 197 transitions. Second operand 42 states. [2019-09-03 20:22:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:10,054 INFO L93 Difference]: Finished difference Result 188 states and 206 transitions. [2019-09-03 20:22:10,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-03 20:22:10,055 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 247 [2019-09-03 20:22:10,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:10,057 INFO L225 Difference]: With dead ends: 188 [2019-09-03 20:22:10,057 INFO L226 Difference]: Without dead ends: 183 [2019-09-03 20:22:10,059 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=1882, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 20:22:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-03 20:22:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2019-09-03 20:22:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-09-03 20:22:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 201 transitions. [2019-09-03 20:22:10,075 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 201 transitions. Word has length 247 [2019-09-03 20:22:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:10,076 INFO L475 AbstractCegarLoop]: Abstraction has 183 states and 201 transitions. [2019-09-03 20:22:10,076 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-03 20:22:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 201 transitions. [2019-09-03 20:22:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-09-03 20:22:10,077 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:10,077 INFO L399 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:10,078 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:10,078 INFO L82 PathProgramCache]: Analyzing trace with hash 743669647, now seen corresponding path program 34 times [2019-09-03 20:22:10,078 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:10,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:10,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:10,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:10,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:10,082 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:10,082 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:10,082 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:22:10,092 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST