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/lcm2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:58:56,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:58:56,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:58:56,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:58:56,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:58:56,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:58:56,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:58:56,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:58:56,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:58:56,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:58:56,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:58:56,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:58:56,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:58:56,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:58:56,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:58:56,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:58:56,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:58:56,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:58:56,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:58:56,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:58:56,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:58:56,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:58:56,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:58:56,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:58:56,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:58:56,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:58:56,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:58:56,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:58:56,702 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 [2019-09-20 12:58:56,716 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:58:56,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:58:56,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:58:56,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:58:56,718 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:58:56,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:58:56,718 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:58:56,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:58:56,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:58:56,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:58:56,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:58:56,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:58:56,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:58:56,720 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:58:56,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:58:56,720 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:58:56,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:58:56,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:58:56,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:58:56,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:58:56,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:58:56,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:58:56,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:58:56,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:58:56,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:58:56,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:58:56,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:58:56,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:58:56,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:58:56,763 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:58:56,774 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:58:56,778 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:58:56,779 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:58:56,780 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:58:56,780 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm2.c [2019-09-20 12:58:56,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d7d252d/2f905588e0724427a46e7d20e981b7ae/FLAGd850b8bba [2019-09-20 12:58:57,287 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:58:57,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm2.c [2019-09-20 12:58:57,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d7d252d/2f905588e0724427a46e7d20e981b7ae/FLAGd850b8bba [2019-09-20 12:58:57,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d7d252d/2f905588e0724427a46e7d20e981b7ae [2019-09-20 12:58:57,609 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:58:57,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:58:57,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:58:57,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:58:57,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:58:57,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:58:57" (1/1) ... [2019-09-20 12:58:57,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c50b988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:57, skipping insertion in model container [2019-09-20 12:58:57,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:58:57" (1/1) ... [2019-09-20 12:58:57,630 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:58:57,646 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:58:57,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:58:57,849 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:58:57,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:58:57,883 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:58:57,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:57 WrapperNode [2019-09-20 12:58:57,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:58:57,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:58:57,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:58:57,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:58:57,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:57" (1/1) ... [2019-09-20 12:58:57,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:57" (1/1) ... [2019-09-20 12:58:57,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:57" (1/1) ... [2019-09-20 12:58:57,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:57" (1/1) ... [2019-09-20 12:58:57,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:57" (1/1) ... [2019-09-20 12:58:57,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:57" (1/1) ... [2019-09-20 12:58:58,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:57" (1/1) ... [2019-09-20 12:58:58,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:58:58,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:58:58,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:58:58,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:58:58,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:57" (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 [2019-09-20 12:58:58,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:58:58,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:58:58,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:58:58,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:58:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:58:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 12:58:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 12:58:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:58:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:58:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:58:58,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:58:58,249 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:58:58,249 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 12:58:58,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:58:58 BoogieIcfgContainer [2019-09-20 12:58:58,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:58:58,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:58:58,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:58:58,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:58:58,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:58:57" (1/3) ... [2019-09-20 12:58:58,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d716e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:58:58, skipping insertion in model container [2019-09-20 12:58:58,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:57" (2/3) ... [2019-09-20 12:58:58,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d716e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:58:58, skipping insertion in model container [2019-09-20 12:58:58,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:58:58" (3/3) ... [2019-09-20 12:58:58,260 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm2.c [2019-09-20 12:58:58,274 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:58:58,285 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:58:58,305 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:58:58,334 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:58:58,335 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:58:58,335 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:58:58,335 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:58:58,335 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:58:58,335 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:58:58,336 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:58:58,336 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:58:58,336 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:58:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-20 12:58:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:58:58,357 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:58,357 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:58,360 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash -858950785, now seen corresponding path program 1 times [2019-09-20 12:58:58,367 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:58,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:58,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:58,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:58,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:58:58,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:58:58,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:58:58,490 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:58:58,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:58:58,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:58:58,503 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-20 12:58:58,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:58,525 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2019-09-20 12:58:58,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:58:58,527 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-20 12:58:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:58,535 INFO L225 Difference]: With dead ends: 37 [2019-09-20 12:58:58,535 INFO L226 Difference]: Without dead ends: 16 [2019-09-20 12:58:58,539 INFO L636 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 [2019-09-20 12:58:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-20 12:58:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-20 12:58:58,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-20 12:58:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-20 12:58:58,575 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-20 12:58:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:58,576 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-20 12:58:58,576 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:58:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-20 12:58:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:58:58,577 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:58,577 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:58,578 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:58,578 INFO L82 PathProgramCache]: Analyzing trace with hash -871939661, now seen corresponding path program 1 times [2019-09-20 12:58:58,578 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:58,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:58,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:58,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:58,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:58,594 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:58,595 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:58,596 INFO L224 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 [2019-09-20 12:58:58,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:58,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 12:58:58,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:58,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:58:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:58:58,778 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:58:58,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 12:58:58,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:58:58,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:58:58,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:58:58,783 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-20 12:58:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:58,914 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-20 12:58:58,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:58:58,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-20 12:58:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:58,918 INFO L225 Difference]: With dead ends: 27 [2019-09-20 12:58:58,919 INFO L226 Difference]: Without dead ends: 24 [2019-09-20 12:58:58,920 INFO L636 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 [2019-09-20 12:58:58,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-20 12:58:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-09-20 12:58:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-20 12:58:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-20 12:58:58,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-09-20 12:58:58,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:58,938 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-20 12:58:58,938 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:58:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-20 12:58:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 12:58:58,939 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:58,940 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:58,940 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:58,941 INFO L82 PathProgramCache]: Analyzing trace with hash 427538464, now seen corresponding path program 1 times [2019-09-20 12:58:58,942 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:58,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:58,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:58,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:58,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:58,966 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:58,967 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:58,967 INFO L224 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 [2019-09-20 12:58:58,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:59,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-20 12:58:59,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:59,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:58:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:58:59,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:58:59,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-20 12:58:59,133 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:58:59,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:58:59,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:58:59,134 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2019-09-20 12:58:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:59,259 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-09-20 12:58:59,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:58:59,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-09-20 12:58:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:59,261 INFO L225 Difference]: With dead ends: 35 [2019-09-20 12:58:59,261 INFO L226 Difference]: Without dead ends: 32 [2019-09-20 12:58:59,262 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:58:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-20 12:58:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-20 12:58:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-20 12:58:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-09-20 12:58:59,271 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2019-09-20 12:58:59,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:59,272 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-09-20 12:58:59,272 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:58:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-09-20 12:58:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 12:58:59,273 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:59,274 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:59,274 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:59,275 INFO L82 PathProgramCache]: Analyzing trace with hash 484796766, now seen corresponding path program 1 times [2019-09-20 12:58:59,275 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:59,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:59,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:59,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:59,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:59,283 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:59,283 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:59,284 INFO L224 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:58:59,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:59,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-20 12:58:59,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:59,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:58:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:58:59,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:58:59,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-20 12:58:59,431 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:58:59,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:58:59,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:58:59,433 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 6 states. [2019-09-20 12:58:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:59,533 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-09-20 12:58:59,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:58:59,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-09-20 12:58:59,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:59,536 INFO L225 Difference]: With dead ends: 42 [2019-09-20 12:58:59,536 INFO L226 Difference]: Without dead ends: 39 [2019-09-20 12:58:59,537 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:58:59,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-20 12:58:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-09-20 12:58:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-20 12:58:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-09-20 12:58:59,557 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2019-09-20 12:58:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:59,557 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-09-20 12:58:59,560 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:58:59,560 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-09-20 12:58:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-20 12:58:59,561 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:59,561 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:59,561 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:59,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1597862285, now seen corresponding path program 2 times [2019-09-20 12:58:59,565 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:59,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:59,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:59,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:59,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:59,584 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:59,585 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:59,585 INFO L224 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 [2019-09-20 12:58:59,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:58:59,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:58:59,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:58:59,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-20 12:58:59,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:59,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:58:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 12:58:59,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:58:59,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-20 12:58:59,734 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:58:59,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:58:59,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:58:59,735 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2019-09-20 12:58:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:59,874 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-09-20 12:58:59,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:58:59,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-09-20 12:58:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:59,876 INFO L225 Difference]: With dead ends: 50 [2019-09-20 12:58:59,876 INFO L226 Difference]: Without dead ends: 47 [2019-09-20 12:58:59,877 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:58:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-20 12:58:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-09-20 12:58:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-20 12:58:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-09-20 12:58:59,886 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2019-09-20 12:58:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:59,886 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-09-20 12:58:59,886 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:58:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-09-20 12:58:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-20 12:58:59,887 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:59,888 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:59,888 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:59,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1655120587, now seen corresponding path program 1 times [2019-09-20 12:58:59,889 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:59,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:59,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:59,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:58:59,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:59,900 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:58:59,901 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:58:59,905 INFO L224 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 [2019-09-20 12:58:59,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:59,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-20 12:58:59,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:00,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 12:59:00,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:00,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-20 12:59:00,086 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:59:00,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:59:00,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:00,088 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 7 states. [2019-09-20 12:59:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:00,237 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-09-20 12:59:00,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:59:00,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-09-20 12:59:00,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:00,239 INFO L225 Difference]: With dead ends: 50 [2019-09-20 12:59:00,239 INFO L226 Difference]: Without dead ends: 47 [2019-09-20 12:59:00,239 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:59:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-20 12:59:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-09-20 12:59:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-20 12:59:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-09-20 12:59:00,254 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2019-09-20 12:59:00,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:00,257 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-09-20 12:59:00,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:59:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-09-20 12:59:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-20 12:59:00,258 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:00,258 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:00,259 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:00,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:00,259 INFO L82 PathProgramCache]: Analyzing trace with hash 586745035, now seen corresponding path program 2 times [2019-09-20 12:59:00,260 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:00,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:00,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:00,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:00,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:00,275 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:00,276 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:00,276 INFO L224 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) [2019-09-20 12:59:00,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:00,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:00,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:00,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-20 12:59:00,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:00,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 12:59:00,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:00,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-20 12:59:00,421 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:59:00,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:59:00,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:00,422 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 7 states. [2019-09-20 12:59:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:00,539 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2019-09-20 12:59:00,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:59:00,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-09-20 12:59:00,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:00,540 INFO L225 Difference]: With dead ends: 58 [2019-09-20 12:59:00,541 INFO L226 Difference]: Without dead ends: 55 [2019-09-20 12:59:00,541 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:59:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-20 12:59:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2019-09-20 12:59:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-20 12:59:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-09-20 12:59:00,550 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 26 [2019-09-20 12:59:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:00,551 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-09-20 12:59:00,551 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:59:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-09-20 12:59:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-20 12:59:00,552 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:00,552 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:00,553 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:00,553 INFO L82 PathProgramCache]: Analyzing trace with hash 644003337, now seen corresponding path program 2 times [2019-09-20 12:59:00,553 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:00,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:00,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:00,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:00,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:00,560 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:00,560 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:00,560 INFO L224 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 [2019-09-20 12:59:00,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:59:00,601 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:00,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:00,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-20 12:59:00,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:00,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 12:59:00,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:00,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-20 12:59:00,703 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:59:00,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:59:00,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:00,704 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 7 states. [2019-09-20 12:59:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:00,830 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2019-09-20 12:59:00,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:59:00,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-09-20 12:59:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:00,832 INFO L225 Difference]: With dead ends: 58 [2019-09-20 12:59:00,832 INFO L226 Difference]: Without dead ends: 55 [2019-09-20 12:59:00,833 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:59:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-20 12:59:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2019-09-20 12:59:00,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-20 12:59:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-09-20 12:59:00,840 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2019-09-20 12:59:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:00,840 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-09-20 12:59:00,841 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:59:00,841 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-09-20 12:59:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-20 12:59:00,842 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:00,842 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:00,842 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:00,843 INFO L82 PathProgramCache]: Analyzing trace with hash -380015110, now seen corresponding path program 3 times [2019-09-20 12:59:00,843 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:00,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:00,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:00,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:00,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:00,849 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:00,849 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:00,850 INFO L224 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) [2019-09-20 12:59:00,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:00,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-20 12:59:00,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:00,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-20 12:59:00,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:00,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-20 12:59:00,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:00,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-20 12:59:01,000 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 12:59:01,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 12:59:01,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:59:01,000 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2019-09-20 12:59:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:01,096 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2019-09-20 12:59:01,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:59:01,097 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2019-09-20 12:59:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:01,098 INFO L225 Difference]: With dead ends: 65 [2019-09-20 12:59:01,098 INFO L226 Difference]: Without dead ends: 62 [2019-09-20 12:59:01,098 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:59:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-20 12:59:01,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-09-20 12:59:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-20 12:59:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2019-09-20 12:59:01,108 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2019-09-20 12:59:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:01,109 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2019-09-20 12:59:01,109 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 12:59:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2019-09-20 12:59:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-20 12:59:01,110 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:01,110 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:01,111 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:01,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:01,111 INFO L82 PathProgramCache]: Analyzing trace with hash -322756808, now seen corresponding path program 3 times [2019-09-20 12:59:01,111 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:01,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:01,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:01,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:01,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:01,117 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:01,117 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:01,117 INFO L224 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:01,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:59:01,145 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-20 12:59:01,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:01,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-20 12:59:01,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:01,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-20 12:59:01,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:01,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-20 12:59:01,247 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 12:59:01,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 12:59:01,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:59:01,248 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 9 states. [2019-09-20 12:59:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:01,386 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2019-09-20 12:59:01,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 12:59:01,387 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-09-20 12:59:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:01,388 INFO L225 Difference]: With dead ends: 73 [2019-09-20 12:59:01,388 INFO L226 Difference]: Without dead ends: 70 [2019-09-20 12:59:01,389 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-09-20 12:59:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-20 12:59:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2019-09-20 12:59:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-20 12:59:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-09-20 12:59:01,398 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 34 [2019-09-20 12:59:01,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:01,398 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-09-20 12:59:01,398 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 12:59:01,398 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-09-20 12:59:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-20 12:59:01,400 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:01,401 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:01,401 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:01,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1391132360, now seen corresponding path program 4 times [2019-09-20 12:59:01,401 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:01,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:01,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:01,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:01,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:01,413 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:01,413 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:01,413 INFO L224 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 [2019-09-20 12:59:01,437 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 12:59:01,451 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 12:59:01,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:01,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-20 12:59:01,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:03,818 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-09-20 12:59:12,384 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 27 [2019-09-20 12:59:23,054 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 33 [2019-09-20 12:59:23,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 8 refuted. 8 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 12:59:23,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:23,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-20 12:59:23,168 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-20 12:59:23,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-20 12:59:23,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=76, Unknown=10, NotChecked=0, Total=110 [2019-09-20 12:59:23,170 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 11 states.