java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:37,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:37,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:37,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:37,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:37,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:37,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:37,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:37,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:37,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:37,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:37,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:37,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:37,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:37,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:37,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:37,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:37,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:37,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:37,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:37,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:37,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:37,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:37,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:37,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:37,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:37,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:37,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:37,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:37,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:37,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:37,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:37,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:37,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:37,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:37,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:37,556 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 23:17:37,578 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:37,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:37,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:37,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:37,580 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:37,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:37,581 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:37,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:37,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:37,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:37,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:37,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:37,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:37,583 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:37,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:37,583 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:37,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:37,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:37,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:37,584 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:37,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:37,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:37,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:37,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:37,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:37,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:37,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:37,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:37,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:37,883 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:37,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:37,908 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:37,910 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:37,910 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:37,911 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps4.c [2019-10-14 23:17:37,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef183b053/ad4c576afc624e168dd6443582926cc8/FLAGa43c14018 [2019-10-14 23:17:38,424 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:38,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4.c [2019-10-14 23:17:38,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef183b053/ad4c576afc624e168dd6443582926cc8/FLAGa43c14018 [2019-10-14 23:17:38,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef183b053/ad4c576afc624e168dd6443582926cc8 [2019-10-14 23:17:38,819 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:38,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:38,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:38,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:38,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:38,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:38" (1/1) ... [2019-10-14 23:17:38,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a08c9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:38, skipping insertion in model container [2019-10-14 23:17:38,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:38" (1/1) ... [2019-10-14 23:17:38,836 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:38,853 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:39,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:39,011 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:39,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:39,041 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:39,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:39 WrapperNode [2019-10-14 23:17:39,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:39,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:39,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:39,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:39,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:39" (1/1) ... [2019-10-14 23:17:39,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:39" (1/1) ... [2019-10-14 23:17:39,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:39" (1/1) ... [2019-10-14 23:17:39,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:39" (1/1) ... [2019-10-14 23:17:39,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:39" (1/1) ... [2019-10-14 23:17:39,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:39" (1/1) ... [2019-10-14 23:17:39,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:39" (1/1) ... [2019-10-14 23:17:39,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:39,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:39,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:39,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:39,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:39" (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 23:17:39,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:39,216 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:39,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:39,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:39,392 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:39,392 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:17:39,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:39 BoogieIcfgContainer [2019-10-14 23:17:39,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:39,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:39,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:39,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:39,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:38" (1/3) ... [2019-10-14 23:17:39,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586a7e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:39, skipping insertion in model container [2019-10-14 23:17:39,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:39" (2/3) ... [2019-10-14 23:17:39,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586a7e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:39, skipping insertion in model container [2019-10-14 23:17:39,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:39" (3/3) ... [2019-10-14 23:17:39,403 INFO L109 eAbstractionObserver]: Analyzing ICFG ps4.c [2019-10-14 23:17:39,414 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:39,422 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:39,437 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:39,470 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:39,470 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:39,471 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:39,471 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:39,471 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:39,472 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:39,472 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:39,472 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:39,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-14 23:17:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:39,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:39,505 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:39,507 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:39,514 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-10-14 23:17:39,523 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:39,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231347138] [2019-10-14 23:17:39,524 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:39,524 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:39,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:39,636 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 23:17:39,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231347138] [2019-10-14 23:17:39,637 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:39,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:39,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337913456] [2019-10-14 23:17:39,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:39,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:39,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:39,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:39,655 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-14 23:17:39,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:39,678 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-10-14 23:17:39,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:39,679 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:39,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:39,688 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:17:39,688 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:17:39,692 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 23:17:39,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:17:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-14 23:17:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:17:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-14 23:17:39,749 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-10-14 23:17:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:39,750 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-14 23:17:39,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:39,751 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-14 23:17:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:39,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:39,756 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:39,756 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:39,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:39,759 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-10-14 23:17:39,759 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:39,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748665225] [2019-10-14 23:17:39,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:39,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:39,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:39,777 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:39,778 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112782228] [2019-10-14 23:17:39,779 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 23:17:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:39,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:17:39,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:39,952 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 23:17:39,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748665225] [2019-10-14 23:17:39,953 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:39,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112782228] [2019-10-14 23:17:39,954 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:39,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:39,955 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269723749] [2019-10-14 23:17:39,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:39,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:39,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:39,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:39,959 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-10-14 23:17:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:40,049 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-10-14 23:17:40,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:40,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:40,053 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:17:40,053 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:17:40,055 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 23:17:40,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:17:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 23:17:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:17:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 23:17:40,071 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-10-14 23:17:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:40,072 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 23:17:40,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:40,073 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 23:17:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:17:40,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:40,075 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:40,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:40,280 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:40,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-10-14 23:17:40,281 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:40,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519438093] [2019-10-14 23:17:40,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:40,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:40,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:40,289 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:40,289 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458513210] [2019-10-14 23:17:40,290 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 23:17:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:40,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:17:40,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:40,414 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 23:17:40,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519438093] [2019-10-14 23:17:40,415 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:40,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458513210] [2019-10-14 23:17:40,415 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:40,415 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:40,416 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571733594] [2019-10-14 23:17:40,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:40,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:40,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:40,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:40,417 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-10-14 23:17:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:40,622 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-14 23:17:40,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:40,623 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-10-14 23:17:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:40,624 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:17:40,625 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:17:40,626 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 23:17:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:17:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 23:17:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:17:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-10-14 23:17:40,643 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 17 [2019-10-14 23:17:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:40,644 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-10-14 23:17:40,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-10-14 23:17:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:17:40,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:40,647 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:40,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:40,851 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:40,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:40,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1323071607, now seen corresponding path program 1 times [2019-10-14 23:17:40,852 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:40,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893156369] [2019-10-14 23:17:40,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:40,853 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:40,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:40,862 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:40,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306204374] [2019-10-14 23:17:40,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:40,905 WARN L254 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:17:40,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:41,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:41,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893156369] [2019-10-14 23:17:41,079 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:41,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306204374] [2019-10-14 23:17:41,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:41,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:41,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456844420] [2019-10-14 23:17:41,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:41,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:41,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:41,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:41,082 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 10 states. [2019-10-14 23:17:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:41,223 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-10-14 23:17:41,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:41,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-10-14 23:17:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:41,225 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:17:41,225 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:17:41,226 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:41,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:17:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-14 23:17:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:17:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-10-14 23:17:41,233 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2019-10-14 23:17:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:41,233 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-10-14 23:17:41,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-10-14 23:17:41,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:17:41,234 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:41,235 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:41,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:41,446 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-10-14 23:17:41,447 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:41,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956339896] [2019-10-14 23:17:41,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:41,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:41,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:41,456 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:41,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256671017] [2019-10-14 23:17:41,456 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:41,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:41,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:41,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:41,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:41,572 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 23:17:41,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956339896] [2019-10-14 23:17:41,573 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:41,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256671017] [2019-10-14 23:17:41,573 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:41,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:41,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437321207] [2019-10-14 23:17:41,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:41,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:41,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:41,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:41,577 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2019-10-14 23:17:41,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:41,706 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2019-10-14 23:17:41,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:41,706 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-14 23:17:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:41,708 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:17:41,708 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:17:41,708 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:17:41,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 23:17:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:17:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-10-14 23:17:41,728 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2019-10-14 23:17:41,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:41,729 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-10-14 23:17:41,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:41,729 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-10-14 23:17:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:17:41,732 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:41,733 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:41,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:41,934 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash 450416527, now seen corresponding path program 2 times [2019-10-14 23:17:41,935 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:41,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444023183] [2019-10-14 23:17:41,936 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:41,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:41,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:41,942 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:41,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643580913] [2019-10-14 23:17:41,942 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 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 23:17:41,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:41,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:41,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:17:41,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:43,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:17:43,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444023183] [2019-10-14 23:17:43,435 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:43,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643580913] [2019-10-14 23:17:43,436 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:43,436 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:43,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998015372] [2019-10-14 23:17:43,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:43,438 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:43,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:43,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:43,438 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2019-10-14 23:17:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:43,592 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-10-14 23:17:43,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:43,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-10-14 23:17:43,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:43,595 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:17:43,595 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 23:17:43,596 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:43,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 23:17:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-14 23:17:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:17:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-10-14 23:17:43,605 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2019-10-14 23:17:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:43,606 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-10-14 23:17:43,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-10-14 23:17:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:17:43,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:43,607 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:43,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:43,811 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:43,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-10-14 23:17:43,812 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:43,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383521571] [2019-10-14 23:17:43,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:43,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:43,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:43,819 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:43,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616585420] [2019-10-14 23:17:43,820 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 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 23:17:43,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:17:43,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:43,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:17:43,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:43,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 23:17:44,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383521571] [2019-10-14 23:17:44,056 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:44,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616585420] [2019-10-14 23:17:44,057 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:44,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:44,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989492939] [2019-10-14 23:17:44,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:44,058 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:44,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:44,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:44,059 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2019-10-14 23:17:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:44,225 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-10-14 23:17:44,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:44,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-10-14 23:17:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:44,228 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:17:44,228 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:17:44,229 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:17:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 23:17:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:17:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-10-14 23:17:44,236 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 31 [2019-10-14 23:17:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:44,237 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-10-14 23:17:44,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-10-14 23:17:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:17:44,238 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:44,238 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:44,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:44,442 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:44,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:44,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1589169527, now seen corresponding path program 3 times [2019-10-14 23:17:44,443 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:44,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437388841] [2019-10-14 23:17:44,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:44,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:44,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:44,449 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:44,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657944786] [2019-10-14 23:17:44,450 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 23:17:44,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:17:44,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:44,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:17:44,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:44,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:17:44,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437388841] [2019-10-14 23:17:44,643 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:44,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657944786] [2019-10-14 23:17:44,643 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:44,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:17:44,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044209090] [2019-10-14 23:17:44,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:17:44,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:44,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:17:44,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:44,645 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 12 states. [2019-10-14 23:17:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:44,800 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2019-10-14 23:17:44,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:17:44,801 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-10-14 23:17:44,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:44,802 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:17:44,802 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:17:44,803 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:17:44,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:17:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 23:17:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:17:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-14 23:17:44,810 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2019-10-14 23:17:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:44,810 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-14 23:17:44,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:17:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-14 23:17:44,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 23:17:44,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:44,812 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:45,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:45,024 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2137184911, now seen corresponding path program 4 times [2019-10-14 23:17:45,025 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:45,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441899417] [2019-10-14 23:17:45,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:45,031 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:45,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517625210] [2019-10-14 23:17:45,031 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 23:17:45,065 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:45,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:45,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 52 conjunts are in the unsatisfiable core [2019-10-14 23:17:45,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:45,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 23:17:45,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441899417] [2019-10-14 23:17:45,249 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:45,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517625210] [2019-10-14 23:17:45,250 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:45,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 23:17:45,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058933628] [2019-10-14 23:17:45,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:17:45,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:45,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:17:45,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:45,252 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 13 states. [2019-10-14 23:17:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:45,499 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2019-10-14 23:17:45,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:17:45,500 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-10-14 23:17:45,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:45,501 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:17:45,501 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:17:45,502 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:17:45,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:17:45,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-14 23:17:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 23:17:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-10-14 23:17:45,514 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2019-10-14 23:17:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:45,515 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-10-14 23:17:45,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:17:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-10-14 23:17:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 23:17:45,517 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:45,518 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:45,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:45,719 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1474060919, now seen corresponding path program 5 times [2019-10-14 23:17:45,720 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:45,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300089964] [2019-10-14 23:17:45,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:45,725 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:45,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139524057] [2019-10-14 23:17:45,726 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 23:17:45,800 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 23:17:45,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:45,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 23:17:45,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:45,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 23:17:45,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300089964] [2019-10-14 23:17:45,956 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:45,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139524057] [2019-10-14 23:17:45,957 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:45,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 23:17:45,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555500593] [2019-10-14 23:17:45,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:17:45,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:45,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:17:45,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:45,959 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2019-10-14 23:17:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:46,141 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-10-14 23:17:46,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:17:46,141 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-10-14 23:17:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:46,142 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:17:46,143 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:17:46,143 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:17:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:17:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-14 23:17:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:17:46,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-10-14 23:17:46,151 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 51 [2019-10-14 23:17:46,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:46,151 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-10-14 23:17:46,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:17:46,152 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-10-14 23:17:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 23:17:46,153 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:46,153 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:46,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:46,358 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1744984689, now seen corresponding path program 6 times [2019-10-14 23:17:46,359 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:46,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384580666] [2019-10-14 23:17:46,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:46,366 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:46,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587890295] [2019-10-14 23:17:46,366 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 23:17:46,443 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:17:46,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:46,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-14 23:17:46,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:46,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 23:17:46,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384580666] [2019-10-14 23:17:46,652 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:46,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587890295] [2019-10-14 23:17:46,653 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:46,653 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-14 23:17:46,653 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879164533] [2019-10-14 23:17:46,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:17:46,654 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:46,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:17:46,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:17:46,655 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2019-10-14 23:17:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:46,966 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2019-10-14 23:17:46,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:17:46,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-10-14 23:17:46,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:46,968 INFO L225 Difference]: With dead ends: 59 [2019-10-14 23:17:46,968 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 23:17:46,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 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 23:17:46,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 23:17:46,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-14 23:17:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 23:17:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2019-10-14 23:17:46,977 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 58 [2019-10-14 23:17:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:46,978 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2019-10-14 23:17:46,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:17:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2019-10-14 23:17:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 23:17:46,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:46,979 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:47,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:47,184 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash -862505097, now seen corresponding path program 7 times [2019-10-14 23:17:47,185 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:47,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222025576] [2019-10-14 23:17:47,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:47,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:47,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:47,191 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:47,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89383005] [2019-10-14 23:17:47,192 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 23:17:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:47,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 65 conjunts are in the unsatisfiable core [2019-10-14 23:17:47,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:47,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 32 proven. 104 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-14 23:17:47,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222025576] [2019-10-14 23:17:47,575 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:47,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89383005] [2019-10-14 23:17:47,576 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:47,576 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-14 23:17:47,576 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516640959] [2019-10-14 23:17:47,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:17:47,577 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:17:47,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:17:47,578 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 16 states. [2019-10-14 23:17:47,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:47,883 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2019-10-14 23:17:47,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:17:47,883 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-10-14 23:17:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:47,885 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:17:47,885 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 23:17:47,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:17:47,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 23:17:47,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-14 23:17:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:17:47,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2019-10-14 23:17:47,896 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 65 [2019-10-14 23:17:47,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:47,896 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2019-10-14 23:17:47,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:17:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2019-10-14 23:17:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-14 23:17:47,898 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:47,898 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:48,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:48,107 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:48,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1738985329, now seen corresponding path program 8 times [2019-10-14 23:17:48,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:48,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889567529] [2019-10-14 23:17:48,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:48,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:48,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:48,113 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:48,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443546337] [2019-10-14 23:17:48,114 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 23:17:48,159 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:48,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:48,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 66 conjunts are in the unsatisfiable core [2019-10-14 23:17:48,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:48,494 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 41 proven. 109 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-14 23:17:48,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889567529] [2019-10-14 23:17:48,534 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:48,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443546337] [2019-10-14 23:17:48,534 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:48,534 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-14 23:17:48,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005445059] [2019-10-14 23:17:48,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:17:48,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:48,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:17:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:17:48,536 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 17 states. [2019-10-14 23:17:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:48,924 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2019-10-14 23:17:48,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:17:48,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2019-10-14 23:17:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:48,926 INFO L225 Difference]: With dead ends: 73 [2019-10-14 23:17:48,926 INFO L226 Difference]: Without dead ends: 68 [2019-10-14 23:17:48,926 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:17:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-14 23:17:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-14 23:17:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 23:17:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2019-10-14 23:17:48,933 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 72 [2019-10-14 23:17:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:48,933 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2019-10-14 23:17:48,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:17:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2019-10-14 23:17:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 23:17:48,934 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:48,934 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:49,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:49,135 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:49,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:49,136 INFO L82 PathProgramCache]: Analyzing trace with hash 54086775, now seen corresponding path program 9 times [2019-10-14 23:17:49,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:49,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931483372] [2019-10-14 23:17:49,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:49,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:49,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:49,143 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:49,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466456600] [2019-10-14 23:17:49,144 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 23:17:49,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 23:17:49,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:49,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 54 conjunts are in the unsatisfiable core [2019-10-14 23:17:49,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:49,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 19 proven. 163 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-10-14 23:17:49,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931483372] [2019-10-14 23:17:49,497 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:49,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466456600] [2019-10-14 23:17:49,498 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:49,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-14 23:17:49,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966980749] [2019-10-14 23:17:49,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:17:49,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:49,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:17:49,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:17:49,500 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 18 states. [2019-10-14 23:17:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:49,882 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2019-10-14 23:17:49,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:17:49,883 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-10-14 23:17:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:49,885 INFO L225 Difference]: With dead ends: 76 [2019-10-14 23:17:49,885 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 23:17:49,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 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 23:17:49,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 23:17:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-14 23:17:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 23:17:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-14 23:17:49,895 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 79 [2019-10-14 23:17:49,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:49,896 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-14 23:17:49,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:17:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-14 23:17:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 23:17:49,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:49,897 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:50,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:50,108 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2145027185, now seen corresponding path program 10 times [2019-10-14 23:17:50,109 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:50,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817076304] [2019-10-14 23:17:50,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:50,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:50,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:50,116 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:50,116 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302480585] [2019-10-14 23:17:50,117 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 23:17:50,172 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:50,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:50,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 78 conjunts are in the unsatisfiable core [2019-10-14 23:17:50,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:50,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 52 proven. 207 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-14 23:17:50,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817076304] [2019-10-14 23:17:50,527 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:50,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302480585] [2019-10-14 23:17:50,528 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:50,528 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-14 23:17:50,528 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124291211] [2019-10-14 23:17:50,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:17:50,529 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:50,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:17:50,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:17:50,530 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 20 states. [2019-10-14 23:17:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:51,058 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2019-10-14 23:17:51,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:17:51,059 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 86 [2019-10-14 23:17:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:51,061 INFO L225 Difference]: With dead ends: 83 [2019-10-14 23:17:51,061 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 23:17:51,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:17:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 23:17:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-10-14 23:17:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 23:17:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2019-10-14 23:17:51,071 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 86 [2019-10-14 23:17:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:51,072 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2019-10-14 23:17:51,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:17:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2019-10-14 23:17:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-14 23:17:51,073 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:51,073 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:51,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:51,278 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:51,278 INFO L82 PathProgramCache]: Analyzing trace with hash -166551177, now seen corresponding path program 11 times [2019-10-14 23:17:51,279 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:51,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767712372] [2019-10-14 23:17:51,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:51,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:51,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:51,284 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:51,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314014676] [2019-10-14 23:17:51,285 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 23:17:51,395 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 23:17:51,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:51,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-14 23:17:51,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:53,433 WARN L860 $PredicateComparison]: unable to prove that (and (= 0 (mod (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (+ (* (* (* (* c_main_~y~0 2) c_main_~y~0) c_main_~y~0) 3) (* .cse0 3) (* (* (* .cse0 c_main_~y~0) c_main_~y~0) 3))) (- 4))) (= c_main_~c~0 2) (= c_main_~y~0 2)) is different from true [2019-10-14 23:17:53,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 29 proven. 215 refuted. 0 times theorem prover too weak. 231 trivial. 11 not checked. [2019-10-14 23:17:53,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767712372] [2019-10-14 23:17:53,629 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:53,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314014676] [2019-10-14 23:17:53,629 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:53,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-14 23:17:53,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666774619] [2019-10-14 23:17:53,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:17:53,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:17:53,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=307, Unknown=1, NotChecked=34, Total=380 [2019-10-14 23:17:53,631 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 20 states. [2019-10-14 23:17:54,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:54,034 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2019-10-14 23:17:54,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:17:54,035 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2019-10-14 23:17:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:54,036 INFO L225 Difference]: With dead ends: 86 [2019-10-14 23:17:54,037 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 23:17:54,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=53, Invalid=412, Unknown=1, NotChecked=40, Total=506 [2019-10-14 23:17:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 23:17:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-10-14 23:17:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-14 23:17:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2019-10-14 23:17:54,047 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 93 [2019-10-14 23:17:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:54,047 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2019-10-14 23:17:54,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:17:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2019-10-14 23:17:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 23:17:54,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:54,049 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:54,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:54,252 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:54,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash 454198927, now seen corresponding path program 12 times [2019-10-14 23:17:54,253 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:54,253 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510039493] [2019-10-14 23:17:54,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:54,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:54,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:54,262 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:54,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146746540] [2019-10-14 23:17:54,262 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 23:17:54,376 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:17:54,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:54,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 66 conjunts are in the unsatisfiable core [2019-10-14 23:17:54,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:54,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 25 proven. 271 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-14 23:17:54,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510039493] [2019-10-14 23:17:54,678 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:54,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146746540] [2019-10-14 23:17:54,679 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:54,679 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-14 23:17:54,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90883269] [2019-10-14 23:17:54,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:17:54,682 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:17:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:17:54,683 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 21 states. [2019-10-14 23:17:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:55,174 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2019-10-14 23:17:55,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:17:55,178 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2019-10-14 23:17:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:55,179 INFO L225 Difference]: With dead ends: 89 [2019-10-14 23:17:55,179 INFO L226 Difference]: Without dead ends: 84 [2019-10-14 23:17:55,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 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 23:17:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-14 23:17:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-10-14 23:17:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 23:17:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2019-10-14 23:17:55,189 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 100 [2019-10-14 23:17:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:55,189 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2019-10-14 23:17:55,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:17:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2019-10-14 23:17:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 23:17:55,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:55,191 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:55,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:55,395 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1400059511, now seen corresponding path program 13 times [2019-10-14 23:17:55,397 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:55,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779214195] [2019-10-14 23:17:55,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:55,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:55,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:55,412 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:55,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85290761] [2019-10-14 23:17:55,413 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:55,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 101 conjunts are in the unsatisfiable core [2019-10-14 23:17:55,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:55,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 62 proven. 311 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-10-14 23:17:55,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779214195] [2019-10-14 23:17:55,959 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:55,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85290761] [2019-10-14 23:17:55,959 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:55,959 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-14 23:17:55,959 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071084792] [2019-10-14 23:17:55,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 23:17:55,960 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:55,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 23:17:55,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:17:55,961 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 22 states. [2019-10-14 23:17:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:56,645 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2019-10-14 23:17:56,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:17:56,646 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2019-10-14 23:17:56,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:56,647 INFO L225 Difference]: With dead ends: 96 [2019-10-14 23:17:56,648 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 23:17:56,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:17:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 23:17:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-10-14 23:17:56,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 23:17:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2019-10-14 23:17:56,658 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 107 [2019-10-14 23:17:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:56,658 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2019-10-14 23:17:56,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 23:17:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2019-10-14 23:17:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 23:17:56,660 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:56,660 INFO L380 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:56,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:56,864 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:56,865 INFO L82 PathProgramCache]: Analyzing trace with hash 13652367, now seen corresponding path program 14 times [2019-10-14 23:17:56,865 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:56,865 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778849702] [2019-10-14 23:17:56,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:56,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:56,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:56,871 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:56,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079482551] [2019-10-14 23:17:56,871 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:56,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:56,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:56,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 102 conjunts are in the unsatisfiable core [2019-10-14 23:17:56,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:57,368 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 71 proven. 316 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-10-14 23:17:57,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778849702] [2019-10-14 23:17:57,437 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:57,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079482551] [2019-10-14 23:17:57,438 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:57,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-14 23:17:57,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984734822] [2019-10-14 23:17:57,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:17:57,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:57,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:17:57,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:17:57,440 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 23 states. [2019-10-14 23:17:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:58,230 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2019-10-14 23:17:58,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:17:58,231 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2019-10-14 23:17:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:58,233 INFO L225 Difference]: With dead ends: 103 [2019-10-14 23:17:58,233 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 23:17:58,234 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:17:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 23:17:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-10-14 23:17:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 23:17:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2019-10-14 23:17:58,243 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 114 [2019-10-14 23:17:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:58,243 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2019-10-14 23:17:58,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:17:58,244 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2019-10-14 23:17:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 23:17:58,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:58,245 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:58,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:58,449 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2108361591, now seen corresponding path program 15 times [2019-10-14 23:17:58,450 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:58,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777069894] [2019-10-14 23:17:58,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:58,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:58,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:58,456 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:58,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966457112] [2019-10-14 23:17:58,456 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:58,619 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-14 23:17:58,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:58,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 78 conjunts are in the unsatisfiable core [2019-10-14 23:17:58,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:58,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 31 proven. 406 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-10-14 23:17:58,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777069894] [2019-10-14 23:17:58,949 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:58,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966457112] [2019-10-14 23:17:58,949 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:58,949 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-14 23:17:58,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408389382] [2019-10-14 23:17:58,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:17:58,950 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:17:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:17:58,951 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 24 states. [2019-10-14 23:17:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:59,646 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2019-10-14 23:17:59,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:17:59,646 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2019-10-14 23:17:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:59,648 INFO L225 Difference]: With dead ends: 106 [2019-10-14 23:17:59,648 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 23:17:59,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:17:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 23:17:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-10-14 23:17:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 23:17:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2019-10-14 23:17:59,658 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 121 [2019-10-14 23:17:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:59,659 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2019-10-14 23:17:59,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:17:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2019-10-14 23:17:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 23:17:59,660 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:59,661 INFO L380 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:59,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:59,865 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:59,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:59,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1794188145, now seen corresponding path program 16 times [2019-10-14 23:17:59,866 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:59,866 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88007204] [2019-10-14 23:17:59,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:59,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:59,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:59,871 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:59,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617644854] [2019-10-14 23:17:59,871 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:59,947 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:59,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:59,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 110 conjunts are in the unsatisfiable core [2019-10-14 23:17:59,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:00,866 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 9 [2019-10-14 23:18:00,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 88 proven. 480 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2019-10-14 23:18:00,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88007204] [2019-10-14 23:18:00,975 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:00,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617644854] [2019-10-14 23:18:00,975 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:00,975 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-14 23:18:00,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703523428] [2019-10-14 23:18:00,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 23:18:00,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:00,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 23:18:00,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:18:00,977 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 26 states. [2019-10-14 23:18:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:02,213 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2019-10-14 23:18:02,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 23:18:02,214 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 128 [2019-10-14 23:18:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:02,217 INFO L225 Difference]: With dead ends: 117 [2019-10-14 23:18:02,217 INFO L226 Difference]: Without dead ends: 112 [2019-10-14 23:18:02,218 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:18:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-14 23:18:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-10-14 23:18:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-14 23:18:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2019-10-14 23:18:02,234 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 128 [2019-10-14 23:18:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:02,234 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2019-10-14 23:18:02,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 23:18:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2019-10-14 23:18:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-14 23:18:02,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:02,237 INFO L380 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:02,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:02,450 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:02,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1962270601, now seen corresponding path program 17 times [2019-10-14 23:18:02,455 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:02,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267708173] [2019-10-14 23:18:02,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:02,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:02,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:02,470 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:02,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110902571] [2019-10-14 23:18:02,471 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:02,920 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 23:18:02,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:02,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 84 conjunts are in the unsatisfiable core [2019-10-14 23:18:02,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:03,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 41 proven. 505 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-10-14 23:18:03,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267708173] [2019-10-14 23:18:03,268 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:03,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110902571] [2019-10-14 23:18:03,268 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:03,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-14 23:18:03,269 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030854508] [2019-10-14 23:18:03,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:18:03,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:03,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:18:03,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:18:03,270 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand 25 states. [2019-10-14 23:18:04,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:04,009 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2019-10-14 23:18:04,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 23:18:04,012 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 135 [2019-10-14 23:18:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:04,013 INFO L225 Difference]: With dead ends: 120 [2019-10-14 23:18:04,014 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 23:18:04,014 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:18:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 23:18:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-10-14 23:18:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-14 23:18:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 122 transitions. [2019-10-14 23:18:04,023 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 122 transitions. Word has length 135 [2019-10-14 23:18:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:04,024 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 122 transitions. [2019-10-14 23:18:04,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:18:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 122 transitions. [2019-10-14 23:18:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-14 23:18:04,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:04,025 INFO L380 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:04,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:04,232 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:04,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:04,233 INFO L82 PathProgramCache]: Analyzing trace with hash 125708175, now seen corresponding path program 18 times [2019-10-14 23:18:04,233 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:04,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39802472] [2019-10-14 23:18:04,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:04,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:04,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:04,246 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:04,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36399407] [2019-10-14 23:18:04,247 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:04,452 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 23:18:04,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:04,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 90 conjunts are in the unsatisfiable core [2019-10-14 23:18:04,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:04,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 37 proven. 568 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-10-14 23:18:04,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39802472] [2019-10-14 23:18:04,843 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:04,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36399407] [2019-10-14 23:18:04,843 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:04,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-10-14 23:18:04,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063437276] [2019-10-14 23:18:04,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:18:04,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:04,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:18:04,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:18:04,844 INFO L87 Difference]: Start difference. First operand 115 states and 122 transitions. Second operand 27 states. [2019-10-14 23:18:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:05,660 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2019-10-14 23:18:05,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 23:18:05,661 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 142 [2019-10-14 23:18:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:05,662 INFO L225 Difference]: With dead ends: 123 [2019-10-14 23:18:05,662 INFO L226 Difference]: Without dead ends: 118 [2019-10-14 23:18:05,663 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:18:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-14 23:18:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-10-14 23:18:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-14 23:18:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2019-10-14 23:18:05,672 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 142 [2019-10-14 23:18:05,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:05,673 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2019-10-14 23:18:05,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:18:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2019-10-14 23:18:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 23:18:05,674 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:05,675 INFO L380 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:05,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:05,878 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:05,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:05,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1172338039, now seen corresponding path program 19 times [2019-10-14 23:18:05,879 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:05,879 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251958002] [2019-10-14 23:18:05,879 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:05,879 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:05,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:05,884 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:05,884 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261595663] [2019-10-14 23:18:05,884 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:18:05,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 137 conjunts are in the unsatisfiable core [2019-10-14 23:18:05,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:06,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 92 proven. 626 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2019-10-14 23:18:06,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251958002] [2019-10-14 23:18:06,587 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:06,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261595663] [2019-10-14 23:18:06,588 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:06,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-14 23:18:06,588 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463935007] [2019-10-14 23:18:06,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:18:06,588 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:06,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:18:06,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:18:06,589 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand 28 states. [2019-10-14 23:18:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:07,672 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2019-10-14 23:18:07,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:18:07,672 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 149 [2019-10-14 23:18:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:07,674 INFO L225 Difference]: With dead ends: 130 [2019-10-14 23:18:07,674 INFO L226 Difference]: Without dead ends: 125 [2019-10-14 23:18:07,675 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:18:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-14 23:18:07,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-10-14 23:18:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 23:18:07,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2019-10-14 23:18:07,685 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 149 [2019-10-14 23:18:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:07,685 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2019-10-14 23:18:07,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:18:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2019-10-14 23:18:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:18:07,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:07,687 INFO L380 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:07,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:07,891 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:07,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:07,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1406022287, now seen corresponding path program 20 times [2019-10-14 23:18:07,892 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:07,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727726474] [2019-10-14 23:18:07,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:07,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:07,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:07,898 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:07,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780919885] [2019-10-14 23:18:07,898 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:07,992 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:18:07,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:07,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 138 conjunts are in the unsatisfiable core [2019-10-14 23:18:07,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:08,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 101 proven. 631 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-10-14 23:18:08,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727726474] [2019-10-14 23:18:08,689 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:08,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780919885] [2019-10-14 23:18:08,689 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:08,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-10-14 23:18:08,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028719446] [2019-10-14 23:18:08,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 23:18:08,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:08,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 23:18:08,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:18:08,691 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand 29 states. [2019-10-14 23:18:09,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:09,822 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2019-10-14 23:18:09,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:18:09,822 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 156 [2019-10-14 23:18:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:09,824 INFO L225 Difference]: With dead ends: 137 [2019-10-14 23:18:09,825 INFO L226 Difference]: Without dead ends: 132 [2019-10-14 23:18:09,826 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:18:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-14 23:18:09,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2019-10-14 23:18:09,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-14 23:18:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2019-10-14 23:18:09,836 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 156 [2019-10-14 23:18:09,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:09,837 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2019-10-14 23:18:09,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 23:18:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2019-10-14 23:18:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-14 23:18:09,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:09,838 INFO L380 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:10,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:10,042 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:10,043 INFO L82 PathProgramCache]: Analyzing trace with hash 746457719, now seen corresponding path program 21 times [2019-10-14 23:18:10,043 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:10,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766430249] [2019-10-14 23:18:10,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:10,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:10,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:10,049 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:10,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009577319] [2019-10-14 23:18:10,050 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:10,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-14 23:18:10,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:10,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 102 conjunts are in the unsatisfiable core [2019-10-14 23:18:10,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:11,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 43 proven. 757 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2019-10-14 23:18:11,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766430249] [2019-10-14 23:18:11,456 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:11,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009577319] [2019-10-14 23:18:11,457 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:11,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-14 23:18:11,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847155164] [2019-10-14 23:18:11,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:18:11,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:11,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:18:11,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:18:11,459 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand 30 states. [2019-10-14 23:18:12,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:12,481 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2019-10-14 23:18:12,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 23:18:12,482 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 163 [2019-10-14 23:18:12,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:12,483 INFO L225 Difference]: With dead ends: 140 [2019-10-14 23:18:12,484 INFO L226 Difference]: Without dead ends: 135 [2019-10-14 23:18:12,484 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:18:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-14 23:18:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2019-10-14 23:18:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-14 23:18:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2019-10-14 23:18:12,495 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 163 [2019-10-14 23:18:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:12,495 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2019-10-14 23:18:12,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:18:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2019-10-14 23:18:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-14 23:18:12,497 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:12,497 INFO L380 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:12,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:12,702 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:12,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1101987215, now seen corresponding path program 22 times [2019-10-14 23:18:12,703 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:12,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287869990] [2019-10-14 23:18:12,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:12,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:12,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:12,709 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:12,709 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436499811] [2019-10-14 23:18:12,709 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:12,867 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:18:12,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:12,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 104 conjunts are in the unsatisfiable core [2019-10-14 23:18:12,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:13,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 45 proven. 826 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2019-10-14 23:18:13,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287869990] [2019-10-14 23:18:13,347 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:13,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436499811] [2019-10-14 23:18:13,347 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:13,347 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-14 23:18:13,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539288621] [2019-10-14 23:18:13,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:18:13,348 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:13,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:18:13,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:18:13,349 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand 30 states. [2019-10-14 23:18:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:14,427 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2019-10-14 23:18:14,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 23:18:14,428 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 170 [2019-10-14 23:18:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:14,429 INFO L225 Difference]: With dead ends: 143 [2019-10-14 23:18:14,430 INFO L226 Difference]: Without dead ends: 138 [2019-10-14 23:18:14,431 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:18:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-10-14 23:18:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2019-10-14 23:18:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-10-14 23:18:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2019-10-14 23:18:14,440 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 170 [2019-10-14 23:18:14,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:14,441 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2019-10-14 23:18:14,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:18:14,441 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2019-10-14 23:18:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-14 23:18:14,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:14,442 INFO L380 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:14,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:14,646 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:14,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:14,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1899159415, now seen corresponding path program 23 times [2019-10-14 23:18:14,647 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:14,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832886363] [2019-10-14 23:18:14,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:14,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:14,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:14,653 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:14,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306578784] [2019-10-14 23:18:14,653 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:15,173 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-14 23:18:15,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:15,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 108 conjunts are in the unsatisfiable core [2019-10-14 23:18:15,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:15,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 56 proven. 889 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2019-10-14 23:18:15,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832886363] [2019-10-14 23:18:15,662 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:15,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306578784] [2019-10-14 23:18:15,662 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:15,662 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-10-14 23:18:15,663 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697441176] [2019-10-14 23:18:15,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:18:15,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:15,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:18:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:18:15,664 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 31 states. [2019-10-14 23:18:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:16,792 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2019-10-14 23:18:16,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 23:18:16,792 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 177 [2019-10-14 23:18:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:16,794 INFO L225 Difference]: With dead ends: 146 [2019-10-14 23:18:16,794 INFO L226 Difference]: Without dead ends: 141 [2019-10-14 23:18:16,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:18:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-14 23:18:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2019-10-14 23:18:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-14 23:18:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2019-10-14 23:18:16,806 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 177 [2019-10-14 23:18:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:16,806 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2019-10-14 23:18:16,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:18:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2019-10-14 23:18:16,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-14 23:18:16,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:16,808 INFO L380 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:17,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:17,012 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1691388047, now seen corresponding path program 24 times [2019-10-14 23:18:17,013 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:17,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465652002] [2019-10-14 23:18:17,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:17,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:17,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:17,020 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:17,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338104487] [2019-10-14 23:18:17,020 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:17,719 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-14 23:18:17,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:17,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 114 conjunts are in the unsatisfiable core [2019-10-14 23:18:17,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:18,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 49 proven. 973 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2019-10-14 23:18:18,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465652002] [2019-10-14 23:18:18,300 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:18,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338104487] [2019-10-14 23:18:18,300 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:18,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-10-14 23:18:18,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518538852] [2019-10-14 23:18:18,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:18:18,300 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:18,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:18:18,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:18:18,301 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 33 states. [2019-10-14 23:18:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:19,507 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2019-10-14 23:18:19,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:18:19,508 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 184 [2019-10-14 23:18:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:19,509 INFO L225 Difference]: With dead ends: 149 [2019-10-14 23:18:19,509 INFO L226 Difference]: Without dead ends: 144 [2019-10-14 23:18:19,510 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:18:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-10-14 23:18:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2019-10-14 23:18:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-10-14 23:18:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2019-10-14 23:18:19,525 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 184 [2019-10-14 23:18:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:19,526 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2019-10-14 23:18:19,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 23:18:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2019-10-14 23:18:19,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-14 23:18:19,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:19,528 INFO L380 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:19,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:19,733 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:19,733 INFO L82 PathProgramCache]: Analyzing trace with hash -95488905, now seen corresponding path program 25 times [2019-10-14 23:18:19,734 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:19,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537380383] [2019-10-14 23:18:19,734 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:19,734 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:19,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:19,742 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:19,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894557143] [2019-10-14 23:18:19,743 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:18:19,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 173 conjunts are in the unsatisfiable core [2019-10-14 23:18:19,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:21,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 122 proven. 1049 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2019-10-14 23:18:21,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537380383] [2019-10-14 23:18:21,257 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:21,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894557143] [2019-10-14 23:18:21,257 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:21,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-10-14 23:18:21,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944453431] [2019-10-14 23:18:21,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:18:21,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:21,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:18:21,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:18:21,259 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand 34 states. [2019-10-14 23:18:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:22,914 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2019-10-14 23:18:22,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 23:18:22,915 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 191 [2019-10-14 23:18:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:22,917 INFO L225 Difference]: With dead ends: 156 [2019-10-14 23:18:22,917 INFO L226 Difference]: Without dead ends: 151 [2019-10-14 23:18:22,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:18:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-14 23:18:22,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-10-14 23:18:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-14 23:18:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2019-10-14 23:18:22,929 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 191 [2019-10-14 23:18:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:22,930 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2019-10-14 23:18:22,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:18:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2019-10-14 23:18:22,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-14 23:18:22,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:22,931 INFO L380 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:23,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:23,135 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:23,136 INFO L82 PathProgramCache]: Analyzing trace with hash 484627343, now seen corresponding path program 26 times [2019-10-14 23:18:23,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:23,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775201358] [2019-10-14 23:18:23,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:23,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:23,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:23,143 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:23,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053468664] [2019-10-14 23:18:23,143 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:23,248 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:18:23,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:23,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 174 conjunts are in the unsatisfiable core [2019-10-14 23:18:23,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:24,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 131 proven. 1054 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2019-10-14 23:18:24,254 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775201358] [2019-10-14 23:18:24,254 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:24,254 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053468664] [2019-10-14 23:18:24,254 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:24,255 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-10-14 23:18:24,255 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6744496] [2019-10-14 23:18:24,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 23:18:24,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:24,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 23:18:24,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:18:24,256 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand 35 states.