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/ps6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:43,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:43,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:43,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:43,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:43,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:43,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:43,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:43,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:43,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:43,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:43,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:43,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:43,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:43,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:43,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:43,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:43,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:43,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:43,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:43,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:43,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:43,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:43,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:43,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:43,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:43,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:43,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:43,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:43,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:43,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:43,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:43,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:43,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:43,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:43,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:43,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:17:43,584 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:43,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:43,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:43,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:43,586 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:43,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:43,587 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:43,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:43,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:43,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:43,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:43,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:43,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:43,588 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:43,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:43,588 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:43,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:43,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:43,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:43,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:43,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:43,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:43,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:43,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:43,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:43,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:43,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:43,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:43,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:43,835 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:43,851 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:43,855 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:43,856 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:43,856 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:43,857 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps6.c [2019-10-14 23:17:43,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad3a5085/4058c744c2774d0a9231622b5e15208e/FLAG651e821cb [2019-10-14 23:17:44,335 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:44,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps6.c [2019-10-14 23:17:44,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad3a5085/4058c744c2774d0a9231622b5e15208e/FLAG651e821cb [2019-10-14 23:17:44,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad3a5085/4058c744c2774d0a9231622b5e15208e [2019-10-14 23:17:44,766 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:44,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:44,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:44,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:44,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:44,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:44" (1/1) ... [2019-10-14 23:17:44,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6487c26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:44, skipping insertion in model container [2019-10-14 23:17:44,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:44" (1/1) ... [2019-10-14 23:17:44,783 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:44,800 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:44,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:44,984 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:45,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:45,018 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:45,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45 WrapperNode [2019-10-14 23:17:45,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:45,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:45,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:45,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:45,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:45,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:45,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:45,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:45,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:45,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:45,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:45,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:45,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:45,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:45,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:45,359 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:45,359 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:17:45,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:45 BoogieIcfgContainer [2019-10-14 23:17:45,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:45,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:45,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:45,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:45,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:44" (1/3) ... [2019-10-14 23:17:45,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73492d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:45, skipping insertion in model container [2019-10-14 23:17:45,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (2/3) ... [2019-10-14 23:17:45,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73492d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:45, skipping insertion in model container [2019-10-14 23:17:45,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:45" (3/3) ... [2019-10-14 23:17:45,368 INFO L109 eAbstractionObserver]: Analyzing ICFG ps6.c [2019-10-14 23:17:45,377 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:45,384 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:45,395 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:45,419 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:45,420 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:45,420 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:45,420 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:45,420 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:45,420 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:45,420 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:45,421 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-14 23:17:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:45,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:45,445 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:45,446 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-10-14 23:17:45,461 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:45,461 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903566611] [2019-10-14 23:17:45,462 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,462 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:45,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903566611] [2019-10-14 23:17:45,558 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:45,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:45,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241797122] [2019-10-14 23:17:45,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:45,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:45,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:45,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:45,579 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-14 23:17:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:45,601 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-10-14 23:17:45,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:45,603 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:45,612 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:17:45,613 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:17:45,616 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:17:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-14 23:17:45,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:17:45,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-14 23:17:45,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-10-14 23:17:45,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:45,654 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-14 23:17:45,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:45,654 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-14 23:17:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:45,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:45,656 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:45,656 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:45,657 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-10-14 23:17:45,657 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:45,657 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785206126] [2019-10-14 23:17:45,658 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,658 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:45,665 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:45,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316810599] [2019-10-14 23:17:45,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:45,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:17:45,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:45,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785206126] [2019-10-14 23:17:45,804 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:45,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316810599] [2019-10-14 23:17:45,804 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:45,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:45,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804289163] [2019-10-14 23:17:45,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:45,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:45,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:45,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:45,807 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-10-14 23:17:45,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:45,888 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-10-14 23:17:45,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:45,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:45,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:45,891 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:17:45,891 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:17:45,892 INFO L600 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 [2019-10-14 23:17:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:17:45,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 23:17:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:17:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 23:17:45,902 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-10-14 23:17:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:45,907 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 23:17:45,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:45,910 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 23:17:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:17:45,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:45,911 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:46,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:46,112 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:46,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-10-14 23:17:46,114 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:46,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384700663] [2019-10-14 23:17:46,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,116 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:46,121 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:46,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270299373] [2019-10-14 23:17:46,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:46,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:17:46,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:46,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384700663] [2019-10-14 23:17:46,328 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:46,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270299373] [2019-10-14 23:17:46,329 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:46,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:46,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000684754] [2019-10-14 23:17:46,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:46,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:46,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:46,335 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-10-14 23:17:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:46,617 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-14 23:17:46,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:46,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-10-14 23:17:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:46,621 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:17:46,622 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:17:46,622 INFO L600 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 [2019-10-14 23:17:46,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:17:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-14 23:17:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:17:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-14 23:17:46,641 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2019-10-14 23:17:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:46,643 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-14 23:17:46,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-14 23:17:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:17:46,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:46,645 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:46,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:46,846 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:46,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:46,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-10-14 23:17:46,847 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:46,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800837491] [2019-10-14 23:17:46,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:46,854 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:46,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370193919] [2019-10-14 23:17:46,855 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:46,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:46,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:46,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:46,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:47,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800837491] [2019-10-14 23:17:47,010 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:47,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370193919] [2019-10-14 23:17:47,010 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:47,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:47,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835356065] [2019-10-14 23:17:47,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:47,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:47,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:47,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:47,012 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-10-14 23:17:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:47,271 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-10-14 23:17:47,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:47,272 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-14 23:17:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:47,273 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:17:47,273 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:17:47,274 INFO L600 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 [2019-10-14 23:17:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:17:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-14 23:17:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:17:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-14 23:17:47,286 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-10-14 23:17:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:47,286 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-14 23:17:47,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-14 23:17:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:17:47,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:47,288 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:47,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:47,491 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:47,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-10-14 23:17:47,492 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:47,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402517108] [2019-10-14 23:17:47,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:47,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:47,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:47,499 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:47,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142207378] [2019-10-14 23:17:47,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:47,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:17:47,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:47,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:17:47,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402517108] [2019-10-14 23:17:47,688 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:47,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142207378] [2019-10-14 23:17:47,689 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:47,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:47,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643475017] [2019-10-14 23:17:47,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:47,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:47,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:47,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:47,691 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2019-10-14 23:17:48,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:48,011 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-10-14 23:17:48,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:48,011 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-10-14 23:17:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:48,014 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:17:48,014 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:17:48,015 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:17:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 23:17:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:17:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-14 23:17:48,023 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2019-10-14 23:17:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:48,024 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-14 23:17:48,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-14 23:17:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:17:48,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:48,025 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:48,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:48,240 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:48,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-10-14 23:17:48,241 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:48,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915404036] [2019-10-14 23:17:48,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:48,243 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:48,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:48,248 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:48,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556367370] [2019-10-14 23:17:48,248 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:48,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:17:48,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:48,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:17:48,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:49,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:55,072 WARN L838 $PredicateComparison]: unable to prove that (or (= |c___VERIFIER_assert_#in~cond| 1) (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))))) is different from false [2019-10-14 23:18:01,096 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))) (= 0 c___VERIFIER_assert_~cond)) (= 1 c___VERIFIER_assert_~cond)) is different from false [2019-10-14 23:18:07,136 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))) is different from false [2019-10-14 23:18:09,139 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))) is different from true [2019-10-14 23:18:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 1 not checked. [2019-10-14 23:18:09,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915404036] [2019-10-14 23:18:09,146 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:09,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556367370] [2019-10-14 23:18:09,147 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:09,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:18:09,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479730] [2019-10-14 23:18:09,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:18:09,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:09,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:18:09,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=15, Unknown=4, NotChecked=24, Total=56 [2019-10-14 23:18:09,149 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2019-10-14 23:18:11,192 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 48 DAG size of output: 3 [2019-10-14 23:18:13,273 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 51 DAG size of output: 6 [2019-10-14 23:18:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:13,472 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-10-14 23:18:13,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:18:13,472 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-10-14 23:18:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:13,474 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:18:13,474 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:18:13,475 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=26, Invalid=38, Unknown=4, NotChecked=42, Total=110 [2019-10-14 23:18:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:18:13,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2019-10-14 23:18:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:18:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-14 23:18:13,484 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 31 [2019-10-14 23:18:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:13,484 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-14 23:18:13,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:18:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-14 23:18:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:18:13,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:13,486 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:13,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:13,702 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:13,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:13,702 INFO L82 PathProgramCache]: Analyzing trace with hash 787245325, now seen corresponding path program 2 times [2019-10-14 23:18:13,703 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:13,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510722652] [2019-10-14 23:18:13,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:13,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:13,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:13,710 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:13,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138900699] [2019-10-14 23:18:13,710 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:13,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:18:13,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:13,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:18:13,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:13,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:18:13,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510722652] [2019-10-14 23:18:13,857 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:13,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138900699] [2019-10-14 23:18:13,858 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:13,858 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:18:13,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649699404] [2019-10-14 23:18:13,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:18:13,859 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:13,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:18:13,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:18:13,869 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2019-10-14 23:18:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:14,043 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-10-14 23:18:14,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:18:14,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-10-14 23:18:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:14,046 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:18:14,047 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:18:14,049 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:18:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:18:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-14 23:18:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:18:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-10-14 23:18:14,058 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 35 [2019-10-14 23:18:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:14,059 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-10-14 23:18:14,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:18:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-10-14 23:18:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:18:14,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:14,060 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:14,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:14,262 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:14,263 INFO L82 PathProgramCache]: Analyzing trace with hash -999891931, now seen corresponding path program 3 times [2019-10-14 23:18:14,263 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:14,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247168678] [2019-10-14 23:18:14,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:14,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:14,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:14,269 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:14,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791622814] [2019-10-14 23:18:14,270 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:14,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:18:14,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:14,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:18:14,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:15,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 23:18:15,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247168678] [2019-10-14 23:18:15,350 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:15,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791622814] [2019-10-14 23:18:15,351 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:15,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:18:15,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036586466] [2019-10-14 23:18:15,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:18:15,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:15,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:18:15,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:18:15,353 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 12 states. [2019-10-14 23:18:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:15,572 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-10-14 23:18:15,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:18:15,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2019-10-14 23:18:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:15,574 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:18:15,574 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:18:15,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:18:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:18:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 23:18:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:18:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-14 23:18:15,589 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 42 [2019-10-14 23:18:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:15,589 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-14 23:18:15,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:18:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-14 23:18:15,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:18:15,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:15,595 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:15,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:15,797 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash -705610227, now seen corresponding path program 4 times [2019-10-14 23:18:15,798 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:15,798 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006384787] [2019-10-14 23:18:15,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:15,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:15,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:15,804 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:15,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315944924] [2019-10-14 23:18:15,804 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:15,845 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:18:15,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:15,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 23:18:15,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:15,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 23:18:15,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006384787] [2019-10-14 23:18:15,990 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:15,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315944924] [2019-10-14 23:18:15,990 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:15,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:18:15,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910309764] [2019-10-14 23:18:15,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:18:15,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:15,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:18:15,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:18:15,992 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 12 states. [2019-10-14 23:18:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:16,214 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2019-10-14 23:18:16,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:18:16,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-10-14 23:18:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:16,216 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:18:16,216 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:18:16,217 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:18:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:18:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 23:18:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:18:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-14 23:18:16,224 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 49 [2019-10-14 23:18:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:16,225 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-14 23:18:16,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:18:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-14 23:18:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 23:18:16,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:16,226 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:16,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:16,435 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:16,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1261987621, now seen corresponding path program 5 times [2019-10-14 23:18:16,436 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:16,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593645115] [2019-10-14 23:18:16,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:16,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:16,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:16,442 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:16,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628173067] [2019-10-14 23:18:16,443 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:16,494 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 23:18:16,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:16,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 23:18:16,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:18,558 WARN L860 $PredicateComparison]: unable to prove that (and (= 0 (mod (+ (* (* (* (* (* (* c_main_~y~0 (- 2)) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) (* (* (* (* (* c_main_~y~0 5) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11) (* c_main_~y~0 c_main_~y~0) (* (* (* (* (* (* c_main_~y~0 6) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11)) (- 12))) (= c_main_~c~0 1) (= c_main_~y~0 1)) is different from true [2019-10-14 23:18:18,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 5 not checked. [2019-10-14 23:18:18,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593645115] [2019-10-14 23:18:18,683 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:18,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628173067] [2019-10-14 23:18:18,684 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:18,684 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 23:18:18,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429379244] [2019-10-14 23:18:18,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:18:18,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:18,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:18:18,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=133, Unknown=1, NotChecked=22, Total=182 [2019-10-14 23:18:18,687 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 14 states. [2019-10-14 23:18:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:18,897 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2019-10-14 23:18:18,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:18:18,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2019-10-14 23:18:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:18,900 INFO L225 Difference]: With dead ends: 52 [2019-10-14 23:18:18,900 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:18:18,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=41, Invalid=202, Unknown=1, NotChecked=28, Total=272 [2019-10-14 23:18:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:18:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 23:18:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:18:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-14 23:18:18,909 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 56 [2019-10-14 23:18:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:18,909 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-14 23:18:18,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:18:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-14 23:18:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 23:18:18,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:18,911 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:19,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:19,115 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:19,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1969050381, now seen corresponding path program 6 times [2019-10-14 23:18:19,116 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:19,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154287741] [2019-10-14 23:18:19,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:19,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:19,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:19,124 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:19,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735517372] [2019-10-14 23:18:19,125 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:19,446 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:18:19,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:19,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-14 23:18:19,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:19,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 23:18:19,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154287741] [2019-10-14 23:18:19,673 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:19,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735517372] [2019-10-14 23:18:19,674 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:19,674 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-14 23:18:19,674 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173616517] [2019-10-14 23:18:19,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:18:19,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:19,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:18:19,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:18:19,676 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 15 states. [2019-10-14 23:18:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:19,943 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-10-14 23:18:19,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:18:19,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-10-14 23:18:19,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:19,945 INFO L225 Difference]: With dead ends: 55 [2019-10-14 23:18:19,945 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:18:19,946 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:18:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:18:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-14 23:18:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:18:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-10-14 23:18:19,954 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 63 [2019-10-14 23:18:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:19,954 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-10-14 23:18:19,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:18:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-10-14 23:18:19,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 23:18:19,956 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:19,956 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:20,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:20,164 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:20,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:20,164 INFO L82 PathProgramCache]: Analyzing trace with hash 855290405, now seen corresponding path program 7 times [2019-10-14 23:18:20,164 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:20,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584239379] [2019-10-14 23:18:20,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:20,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:20,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:20,170 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:20,170 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789749832] [2019-10-14 23:18:20,171 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:18:20,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 65 conjunts are in the unsatisfiable core [2019-10-14 23:18:20,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:21,957 WARN L191 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 43 DAG size of output: 9 [2019-10-14 23:18:21,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 34 proven. 110 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 23:18:22,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584239379] [2019-10-14 23:18:22,048 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:22,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789749832] [2019-10-14 23:18:22,048 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:22,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-14 23:18:22,049 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733656446] [2019-10-14 23:18:22,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:18:22,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:22,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:18:22,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:18:22,050 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 16 states. [2019-10-14 23:18:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:26,217 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2019-10-14 23:18:26,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:18:26,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2019-10-14 23:18:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:26,220 INFO L225 Difference]: With dead ends: 60 [2019-10-14 23:18:26,220 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 23:18:26,221 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:18:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 23:18:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-14 23:18:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 23:18:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-10-14 23:18:26,230 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 70 [2019-10-14 23:18:26,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:26,230 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-10-14 23:18:26,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:18:26,231 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-10-14 23:18:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 23:18:26,232 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:26,232 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:26,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:26,438 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:26,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1484740595, now seen corresponding path program 8 times [2019-10-14 23:18:26,439 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:26,439 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326550531] [2019-10-14 23:18:26,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:26,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:26,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:26,444 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:26,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63265069] [2019-10-14 23:18:26,444 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:26,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:18:26,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:26,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-14 23:18:26,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:26,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 19 proven. 136 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-10-14 23:18:26,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326550531] [2019-10-14 23:18:26,669 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:26,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63265069] [2019-10-14 23:18:26,669 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:26,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-14 23:18:26,670 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471881539] [2019-10-14 23:18:26,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:18:26,670 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:26,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:18:26,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:18:26,671 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 16 states. [2019-10-14 23:18:27,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:27,043 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2019-10-14 23:18:27,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:18:27,043 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2019-10-14 23:18:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:27,045 INFO L225 Difference]: With dead ends: 65 [2019-10-14 23:18:27,045 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 23:18:27,046 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:18:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 23:18:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-14 23:18:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:18:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-10-14 23:18:27,055 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 77 [2019-10-14 23:18:27,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:27,056 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-10-14 23:18:27,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:18:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-10-14 23:18:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-14 23:18:27,057 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:27,057 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:27,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:27,261 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:27,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:27,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1487028955, now seen corresponding path program 9 times [2019-10-14 23:18:27,262 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:27,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21545375] [2019-10-14 23:18:27,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:27,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:27,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:27,268 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:27,268 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675956294] [2019-10-14 23:18:27,268 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:18:27,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 23:18:27,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:27,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 54 conjunts are in the unsatisfiable core [2019-10-14 23:18:27,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:27,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 21 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:18:27,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21545375] [2019-10-14 23:18:27,571 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:27,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675956294] [2019-10-14 23:18:27,571 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:27,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-14 23:18:27,572 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651303272] [2019-10-14 23:18:27,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:18:27,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:27,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:18:27,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:18:27,573 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 18 states. [2019-10-14 23:18:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:28,096 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2019-10-14 23:18:28,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:18:28,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2019-10-14 23:18:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:28,098 INFO L225 Difference]: With dead ends: 68 [2019-10-14 23:18:28,099 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 23:18:28,099 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:18:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 23:18:28,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-10-14 23:18:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 23:18:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2019-10-14 23:18:28,108 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 84 [2019-10-14 23:18:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:28,109 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2019-10-14 23:18:28,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:18:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2019-10-14 23:18:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 23:18:28,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:28,114 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:28,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:28,319 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:28,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:28,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1163182835, now seen corresponding path program 10 times [2019-10-14 23:18:28,320 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:28,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155185284] [2019-10-14 23:18:28,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:28,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:28,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:28,324 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:28,325 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494417107] [2019-10-14 23:18:28,325 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:28,395 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:18:28,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:28,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 56 conjunts are in the unsatisfiable core [2019-10-14 23:18:28,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:30,494 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~y~0 0) (= 0 (mod (+ (* (* (* (* (* (* c_main_~y~0 (- 2)) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) (* (* (* (* (* c_main_~y~0 5) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11) (* c_main_~y~0 c_main_~y~0) (* (* (* (* (* (* c_main_~y~0 6) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11)) (- 12))) (= c_main_~c~0 0)) is different from true [2019-10-14 23:18:32,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 23 proven. 189 refuted. 0 times theorem prover too weak. 231 trivial. 10 not checked. [2019-10-14 23:18:32,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155185284] [2019-10-14 23:18:32,701 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:32,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494417107] [2019-10-14 23:18:32,701 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:32,701 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-14 23:18:32,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049764201] [2019-10-14 23:18:32,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:18:32,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:32,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:18:32,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=272, Unknown=2, NotChecked=32, Total=342 [2019-10-14 23:18:32,703 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 19 states. [2019-10-14 23:18:33,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:33,159 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-10-14 23:18:33,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:18:33,160 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2019-10-14 23:18:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:33,161 INFO L225 Difference]: With dead ends: 71 [2019-10-14 23:18:33,161 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 23:18:33,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=51, Invalid=371, Unknown=2, NotChecked=38, Total=462 [2019-10-14 23:18:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 23:18:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-14 23:18:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 23:18:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2019-10-14 23:18:33,170 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 91 [2019-10-14 23:18:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:33,171 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2019-10-14 23:18:33,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:18:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2019-10-14 23:18:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 23:18:33,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:33,173 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:33,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:33,377 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:33,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1609463771, now seen corresponding path program 11 times [2019-10-14 23:18:33,378 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:33,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878194886] [2019-10-14 23:18:33,378 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:33,379 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:33,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:33,383 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:33,384 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161303105] [2019-10-14 23:18:33,384 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:18:33,524 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 23:18:33,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:33,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-14 23:18:33,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:33,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 31 proven. 229 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-14 23:18:33,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878194886] [2019-10-14 23:18:33,748 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:33,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161303105] [2019-10-14 23:18:33,749 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:33,749 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-14 23:18:33,749 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436477003] [2019-10-14 23:18:33,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:18:33,750 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:33,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:18:33,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:18:33,750 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 19 states. [2019-10-14 23:18:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:34,214 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-10-14 23:18:34,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:18:34,215 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2019-10-14 23:18:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:34,216 INFO L225 Difference]: With dead ends: 74 [2019-10-14 23:18:34,216 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 23:18:34,217 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:18:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 23:18:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-10-14 23:18:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 23:18:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2019-10-14 23:18:34,225 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 98 [2019-10-14 23:18:34,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:34,225 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2019-10-14 23:18:34,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:18:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2019-10-14 23:18:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-14 23:18:34,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:34,226 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:34,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:34,440 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:34,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:34,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1322446323, now seen corresponding path program 12 times [2019-10-14 23:18:34,441 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:34,441 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992614635] [2019-10-14 23:18:34,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:34,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:34,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:34,447 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:34,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488360054] [2019-10-14 23:18:34,447 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:18:35,478 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:18:35,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:35,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 66 conjunts are in the unsatisfiable core [2019-10-14 23:18:35,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:35,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 27 proven. 274 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-14 23:18:35,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992614635] [2019-10-14 23:18:35,769 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:35,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488360054] [2019-10-14 23:18:35,769 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:35,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-14 23:18:35,769 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208275122] [2019-10-14 23:18:35,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:18:35,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:35,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:18:35,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:18:35,770 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 21 states. [2019-10-14 23:18:36,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:36,299 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2019-10-14 23:18:36,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:18:36,300 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2019-10-14 23:18:36,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:36,301 INFO L225 Difference]: With dead ends: 77 [2019-10-14 23:18:36,301 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 23:18:36,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:18:36,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 23:18:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-10-14 23:18:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 23:18:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2019-10-14 23:18:36,310 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 105 [2019-10-14 23:18:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:36,310 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2019-10-14 23:18:36,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:18:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2019-10-14 23:18:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 23:18:36,312 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:36,312 INFO L380 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]