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/egcd3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:17:49,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:17:49,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:17:49,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:17:49,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:17:49,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:17:49,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:17:49,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:17:49,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:17:49,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:17:49,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:17:49,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:17:49,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:17:49,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:17:49,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:17:49,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:17:49,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:17:49,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:17:49,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:17:49,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:17:49,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:17:49,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:17:49,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:17:49,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:17:49,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:17:49,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:17:49,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:17:49,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:17:49,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-03 20:17:49,411 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:17:49,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:17:49,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:17:49,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:17:49,413 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:17:49,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:17:49,413 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:17:49,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:17:49,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:17:49,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:17:49,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:17:49,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:17:49,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:17:49,417 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:17:49,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:17:49,417 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:17:49,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:17:49,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:17:49,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:17:49,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:17:49,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:17:49,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:17:49,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:17:49,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:17:49,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:17:49,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:17:49,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:17:49,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:17:49,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:17:49,467 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:17:49,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:17:49,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:17:49,488 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:17:49,489 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:17:49,489 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3.c [2019-09-03 20:17:49,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45cc01fe/3a8d400c335f49c0bc0e9e257d0dd438/FLAG02caf11ec [2019-09-03 20:17:50,002 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:17:50,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3.c [2019-09-03 20:17:50,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45cc01fe/3a8d400c335f49c0bc0e9e257d0dd438/FLAG02caf11ec [2019-09-03 20:17:50,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45cc01fe/3a8d400c335f49c0bc0e9e257d0dd438 [2019-09-03 20:17:50,406 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:17:50,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:17:50,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:17:50,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:17:50,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:17:50,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:17:50" (1/1) ... [2019-09-03 20:17:50,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61407083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:17:50, skipping insertion in model container [2019-09-03 20:17:50,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:17:50" (1/1) ... [2019-09-03 20:17:50,425 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:17:50,444 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:17:50,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:17:50,656 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:17:50,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:17:50,779 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:17:50,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:17:50 WrapperNode [2019-09-03 20:17:50,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:17:50,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:17:50,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:17:50,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:17:50,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:17:50" (1/1) ... [2019-09-03 20:17:50,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:17:50" (1/1) ... [2019-09-03 20:17:50,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:17:50" (1/1) ... [2019-09-03 20:17:50,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:17:50" (1/1) ... [2019-09-03 20:17:50,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:17:50" (1/1) ... [2019-09-03 20:17:50,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:17:50" (1/1) ... [2019-09-03 20:17:50,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:17:50" (1/1) ... [2019-09-03 20:17:50,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:17:50,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:17:50,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:17:50,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:17:50,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:17:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:17:50,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:17:50,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:17:50,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:17:50,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:17:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:17:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:17:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:17:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:17:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:17:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:17:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:17:51,098 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:17:51,099 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-03 20:17:51,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:17:51 BoogieIcfgContainer [2019-09-03 20:17:51,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:17:51,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:17:51,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:17:51,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:17:51,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:17:50" (1/3) ... [2019-09-03 20:17:51,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12099337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:17:51, skipping insertion in model container [2019-09-03 20:17:51,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:17:50" (2/3) ... [2019-09-03 20:17:51,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12099337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:17:51, skipping insertion in model container [2019-09-03 20:17:51,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:17:51" (3/3) ... [2019-09-03 20:17:51,127 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd3.c [2019-09-03 20:17:51,145 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:17:51,160 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:17:51,175 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:17:51,206 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:17:51,207 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:17:51,207 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:17:51,207 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:17:51,207 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:17:51,208 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:17:51,208 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:17:51,208 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:17:51,208 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:17:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-03 20:17:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:17:51,231 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:51,232 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:51,234 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:51,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:51,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2133473032, now seen corresponding path program 1 times [2019-09-03 20:17:51,239 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:51,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:51,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:51,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:51,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:17:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:17:51,366 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:17:51,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:17:51,370 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:17:51,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:17:51,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:17:51,383 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-03 20:17:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:51,412 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2019-09-03 20:17:51,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:17:51,414 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:17:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:51,425 INFO L225 Difference]: With dead ends: 53 [2019-09-03 20:17:51,425 INFO L226 Difference]: Without dead ends: 24 [2019-09-03 20:17:51,429 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:17:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-03 20:17:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-03 20:17:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 20:17:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-09-03 20:17:51,479 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 10 [2019-09-03 20:17:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:51,479 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-09-03 20:17:51,480 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:17:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-09-03 20:17:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 20:17:51,483 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:51,484 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:51,485 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:51,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:51,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1704601660, now seen corresponding path program 1 times [2019-09-03 20:17:51,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:51,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:51,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:51,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:51,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:51,517 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:51,517 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:51,517 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:51,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:17:51,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-03 20:17:51,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:17:51,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:17:51,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:17:51,655 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:17:51,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:17:51,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:17:51,656 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 3 states. [2019-09-03 20:17:51,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:51,688 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2019-09-03 20:17:51,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:17:51,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-09-03 20:17:51,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:51,690 INFO L225 Difference]: With dead ends: 43 [2019-09-03 20:17:51,691 INFO L226 Difference]: Without dead ends: 36 [2019-09-03 20:17:51,692 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:17:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-03 20:17:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2019-09-03 20:17:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-03 20:17:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-09-03 20:17:51,705 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 11 [2019-09-03 20:17:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:51,707 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-09-03 20:17:51,707 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:17:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-09-03 20:17:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-03 20:17:51,708 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:51,709 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:51,709 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:51,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:51,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1987085660, now seen corresponding path program 1 times [2019-09-03 20:17:51,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:51,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:51,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:51,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:51,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:51,741 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:51,741 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:51,742 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:51,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:17:51,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 20:17:51,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:17:51,859 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:17:51,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:17:51,860 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:17:51,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:17:51,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:17:51,861 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2019-09-03 20:17:51,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:51,931 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2019-09-03 20:17:51,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:17:51,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-03 20:17:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:51,933 INFO L225 Difference]: With dead ends: 42 [2019-09-03 20:17:51,933 INFO L226 Difference]: Without dead ends: 40 [2019-09-03 20:17:51,934 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:17:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-03 20:17:51,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-03 20:17:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-03 20:17:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-09-03 20:17:51,946 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 14 [2019-09-03 20:17:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:51,946 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-09-03 20:17:51,947 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:17:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-09-03 20:17:51,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:17:51,947 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:51,948 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:51,948 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:51,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:51,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1574644974, now seen corresponding path program 1 times [2019-09-03 20:17:51,949 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:51,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:51,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:51,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:51,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:51,957 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:51,957 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:51,957 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:51,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:17:51,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 20:17:51,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:17:52,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:17:52,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-03 20:17:52,036 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:17:52,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:17:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:17:52,037 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 5 states. [2019-09-03 20:17:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:52,187 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2019-09-03 20:17:52,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:17:52,188 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-03 20:17:52,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:52,192 INFO L225 Difference]: With dead ends: 85 [2019-09-03 20:17:52,192 INFO L226 Difference]: Without dead ends: 78 [2019-09-03 20:17:52,193 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:17:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-03 20:17:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2019-09-03 20:17:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-03 20:17:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2019-09-03 20:17:52,232 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 16 [2019-09-03 20:17:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:52,232 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2019-09-03 20:17:52,232 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:17:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2019-09-03 20:17:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 20:17:52,233 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:52,234 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:52,234 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:52,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1955242494, now seen corresponding path program 1 times [2019-09-03 20:17:52,237 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:52,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:52,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:52,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:52,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:52,257 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:52,259 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:52,259 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:52,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:52,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 20:17:52,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:17:52,359 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:17:52,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:17:52,360 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:17:52,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:17:52,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:17:52,380 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand 5 states. [2019-09-03 20:17:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:52,481 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2019-09-03 20:17:52,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:17:52,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-09-03 20:17:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:52,484 INFO L225 Difference]: With dead ends: 68 [2019-09-03 20:17:52,485 INFO L226 Difference]: Without dead ends: 66 [2019-09-03 20:17:52,485 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:17:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-03 20:17:52,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-09-03 20:17:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-03 20:17:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2019-09-03 20:17:52,514 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 19 [2019-09-03 20:17:52,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:52,514 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2019-09-03 20:17:52,515 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:17:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2019-09-03 20:17:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 20:17:52,518 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:52,518 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:52,518 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:52,519 INFO L82 PathProgramCache]: Analyzing trace with hash -697444338, now seen corresponding path program 1 times [2019-09-03 20:17:52,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:52,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:52,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:52,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:52,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:52,530 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:52,530 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:52,530 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:52,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:17:52,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:17:52,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:17:52,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:17:52,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-03 20:17:52,634 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:17:52,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:17:52,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:17:52,634 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 6 states. [2019-09-03 20:17:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:52,765 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2019-09-03 20:17:52,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:17:52,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-09-03 20:17:52,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:52,767 INFO L225 Difference]: With dead ends: 102 [2019-09-03 20:17:52,767 INFO L226 Difference]: Without dead ends: 100 [2019-09-03 20:17:52,768 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:17:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-03 20:17:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2019-09-03 20:17:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-03 20:17:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2019-09-03 20:17:52,795 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 19 [2019-09-03 20:17:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:52,795 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2019-09-03 20:17:52,795 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:17:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2019-09-03 20:17:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 20:17:52,797 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:52,797 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:52,798 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:52,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1428232868, now seen corresponding path program 1 times [2019-09-03 20:17:52,798 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:52,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:52,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:52,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:52,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:52,821 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:52,821 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:52,821 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:52,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:17:52,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 20:17:52,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:17:52,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:17:52,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:17:52,900 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:17:52,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:17:52,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:17:52,901 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand 5 states. [2019-09-03 20:17:52,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:52,975 INFO L93 Difference]: Finished difference Result 140 states and 199 transitions. [2019-09-03 20:17:52,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:17:52,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-03 20:17:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:52,978 INFO L225 Difference]: With dead ends: 140 [2019-09-03 20:17:52,978 INFO L226 Difference]: Without dead ends: 138 [2019-09-03 20:17:52,979 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:17:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-09-03 20:17:53,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2019-09-03 20:17:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-03 20:17:53,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 191 transitions. [2019-09-03 20:17:53,003 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 191 transitions. Word has length 24 [2019-09-03 20:17:53,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:53,003 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 191 transitions. [2019-09-03 20:17:53,003 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:17:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 191 transitions. [2019-09-03 20:17:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 20:17:53,004 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:53,005 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:53,005 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:53,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:53,005 INFO L82 PathProgramCache]: Analyzing trace with hash -369092908, now seen corresponding path program 1 times [2019-09-03 20:17:53,005 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:53,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:53,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:53,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:53,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:53,012 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:53,012 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:53,012 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:53,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:17:53,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 20:17:53,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:17:53,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:17:53,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-03 20:17:53,138 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:17:53,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:17:53,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:17:53,139 INFO L87 Difference]: Start difference. First operand 132 states and 191 transitions. Second operand 7 states. [2019-09-03 20:17:53,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:53,347 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2019-09-03 20:17:53,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:17:53,348 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-09-03 20:17:53,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:53,350 INFO L225 Difference]: With dead ends: 145 [2019-09-03 20:17:53,350 INFO L226 Difference]: Without dead ends: 143 [2019-09-03 20:17:53,352 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:17:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-09-03 20:17:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2019-09-03 20:17:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-03 20:17:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 197 transitions. [2019-09-03 20:17:53,399 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 197 transitions. Word has length 24 [2019-09-03 20:17:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:53,400 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 197 transitions. [2019-09-03 20:17:53,400 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:17:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 197 transitions. [2019-09-03 20:17:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 20:17:53,401 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:53,402 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:53,402 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:53,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1273187556, now seen corresponding path program 2 times [2019-09-03 20:17:53,403 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:53,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:53,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:53,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:53,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:53,410 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:53,411 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:53,411 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:53,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:53,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:17:53,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:17:53,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 20:17:53,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:17:53,485 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:17:53,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:17:53,485 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:17:53,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:17:53,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:17:53,486 INFO L87 Difference]: Start difference. First operand 140 states and 197 transitions. Second operand 5 states. [2019-09-03 20:17:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:53,619 INFO L93 Difference]: Finished difference Result 179 states and 249 transitions. [2019-09-03 20:17:53,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:17:53,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-03 20:17:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:53,623 INFO L225 Difference]: With dead ends: 179 [2019-09-03 20:17:53,623 INFO L226 Difference]: Without dead ends: 123 [2019-09-03 20:17:53,624 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:17:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-03 20:17:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2019-09-03 20:17:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-09-03 20:17:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2019-09-03 20:17:53,639 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 24 [2019-09-03 20:17:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:53,639 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2019-09-03 20:17:53,639 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:17:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2019-09-03 20:17:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-03 20:17:53,640 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:53,640 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:53,641 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:53,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:53,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1127690622, now seen corresponding path program 1 times [2019-09-03 20:17:53,641 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:53,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:53,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:53,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:17:53,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:53,649 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:53,649 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:53,649 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:53,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:53,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 20:17:53,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 20:17:53,702 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:17:53,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:17:53,703 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:17:53,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:17:53,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:17:53,704 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand 5 states. [2019-09-03 20:17:53,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:53,779 INFO L93 Difference]: Finished difference Result 183 states and 266 transitions. [2019-09-03 20:17:53,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:17:53,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-09-03 20:17:53,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:53,781 INFO L225 Difference]: With dead ends: 183 [2019-09-03 20:17:53,782 INFO L226 Difference]: Without dead ends: 181 [2019-09-03 20:17:53,782 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:17:53,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-09-03 20:17:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 159. [2019-09-03 20:17:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-09-03 20:17:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 230 transitions. [2019-09-03 20:17:53,805 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 230 transitions. Word has length 29 [2019-09-03 20:17:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:53,806 INFO L475 AbstractCegarLoop]: Abstraction has 159 states and 230 transitions. [2019-09-03 20:17:53,806 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:17:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 230 transitions. [2019-09-03 20:17:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-03 20:17:53,807 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:53,808 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:53,808 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:53,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1508679066, now seen corresponding path program 1 times [2019-09-03 20:17:53,808 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:53,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:53,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:53,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:53,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:53,816 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:53,816 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:53,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:53,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:17:53,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-03 20:17:53,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-03 20:17:54,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:17:54,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:17:54,052 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:17:54,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:17:54,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:17:54,053 INFO L87 Difference]: Start difference. First operand 159 states and 230 transitions. Second operand 10 states. [2019-09-03 20:17:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:54,530 INFO L93 Difference]: Finished difference Result 222 states and 321 transitions. [2019-09-03 20:17:54,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:17:54,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-09-03 20:17:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:54,536 INFO L225 Difference]: With dead ends: 222 [2019-09-03 20:17:54,536 INFO L226 Difference]: Without dead ends: 219 [2019-09-03 20:17:54,537 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:17:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-09-03 20:17:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2019-09-03 20:17:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-09-03 20:17:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 314 transitions. [2019-09-03 20:17:54,565 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 314 transitions. Word has length 41 [2019-09-03 20:17:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:54,565 INFO L475 AbstractCegarLoop]: Abstraction has 216 states and 314 transitions. [2019-09-03 20:17:54,565 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:17:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 314 transitions. [2019-09-03 20:17:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-03 20:17:54,567 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:54,568 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:54,568 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:54,568 INFO L82 PathProgramCache]: Analyzing trace with hash -458231108, now seen corresponding path program 2 times [2019-09-03 20:17:54,568 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:54,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:54,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:54,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:54,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:54,574 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:54,574 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:54,575 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:54,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:17:54,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:17:54,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:17:54,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 20:17:54,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-03 20:17:54,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:17:54,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:17:54,678 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:17:54,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:17:54,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:17:54,679 INFO L87 Difference]: Start difference. First operand 216 states and 314 transitions. Second operand 8 states. [2019-09-03 20:17:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:55,065 INFO L93 Difference]: Finished difference Result 327 states and 490 transitions. [2019-09-03 20:17:55,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:17:55,066 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2019-09-03 20:17:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:55,069 INFO L225 Difference]: With dead ends: 327 [2019-09-03 20:17:55,069 INFO L226 Difference]: Without dead ends: 320 [2019-09-03 20:17:55,070 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:17:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-09-03 20:17:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 235. [2019-09-03 20:17:55,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2019-09-03 20:17:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 341 transitions. [2019-09-03 20:17:55,103 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 341 transitions. Word has length 46 [2019-09-03 20:17:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:55,103 INFO L475 AbstractCegarLoop]: Abstraction has 235 states and 341 transitions. [2019-09-03 20:17:55,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:17:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 341 transitions. [2019-09-03 20:17:55,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-03 20:17:55,105 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:55,105 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:55,106 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:55,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:55,106 INFO L82 PathProgramCache]: Analyzing trace with hash -659177953, now seen corresponding path program 1 times [2019-09-03 20:17:55,106 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:55,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:55,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:55,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:17:55,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:55,113 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:55,114 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:55,114 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:55,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:17:55,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:17:55,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-09-03 20:17:55,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:17:55,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-03 20:17:55,214 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:17:55,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:17:55,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:17:55,215 INFO L87 Difference]: Start difference. First operand 235 states and 341 transitions. Second operand 6 states. [2019-09-03 20:17:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:55,366 INFO L93 Difference]: Finished difference Result 347 states and 523 transitions. [2019-09-03 20:17:55,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:17:55,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2019-09-03 20:17:55,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:55,369 INFO L225 Difference]: With dead ends: 347 [2019-09-03 20:17:55,370 INFO L226 Difference]: Without dead ends: 345 [2019-09-03 20:17:55,370 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:17:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2019-09-03 20:17:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 300. [2019-09-03 20:17:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2019-09-03 20:17:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 455 transitions. [2019-09-03 20:17:55,411 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 455 transitions. Word has length 51 [2019-09-03 20:17:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:55,411 INFO L475 AbstractCegarLoop]: Abstraction has 300 states and 455 transitions. [2019-09-03 20:17:55,411 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:17:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 455 transitions. [2019-09-03 20:17:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-03 20:17:55,413 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:55,413 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:55,413 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1838702556, now seen corresponding path program 1 times [2019-09-03 20:17:55,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:55,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:55,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:55,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:55,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:55,419 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:55,419 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:55,420 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:55,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:17:55,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-03 20:17:55,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:17:55,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:17:55,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:17:55,574 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:17:55,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:17:55,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:17:55,575 INFO L87 Difference]: Start difference. First operand 300 states and 455 transitions. Second operand 8 states. [2019-09-03 20:17:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:55,792 INFO L93 Difference]: Finished difference Result 358 states and 543 transitions. [2019-09-03 20:17:55,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:17:55,792 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2019-09-03 20:17:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:55,797 INFO L225 Difference]: With dead ends: 358 [2019-09-03 20:17:55,797 INFO L226 Difference]: Without dead ends: 356 [2019-09-03 20:17:55,798 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:17:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2019-09-03 20:17:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2019-09-03 20:17:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2019-09-03 20:17:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 537 transitions. [2019-09-03 20:17:55,848 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 537 transitions. Word has length 49 [2019-09-03 20:17:55,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:55,848 INFO L475 AbstractCegarLoop]: Abstraction has 352 states and 537 transitions. [2019-09-03 20:17:55,848 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:17:55,848 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 537 transitions. [2019-09-03 20:17:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-03 20:17:55,850 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:55,850 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:55,850 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:55,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:55,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1685131186, now seen corresponding path program 2 times [2019-09-03 20:17:55,851 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:55,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:55,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:55,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:55,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:55,863 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:55,863 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:55,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:55,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:17:55,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:17:55,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:17:55,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-03 20:17:55,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 20:17:55,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:17:55,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:17:55,981 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:17:55,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:17:55,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:17:55,985 INFO L87 Difference]: Start difference. First operand 352 states and 537 transitions. Second operand 5 states. [2019-09-03 20:17:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:56,093 INFO L93 Difference]: Finished difference Result 618 states and 936 transitions. [2019-09-03 20:17:56,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:17:56,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-09-03 20:17:56,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:56,097 INFO L225 Difference]: With dead ends: 618 [2019-09-03 20:17:56,097 INFO L226 Difference]: Without dead ends: 356 [2019-09-03 20:17:56,103 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:17:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2019-09-03 20:17:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 335. [2019-09-03 20:17:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2019-09-03 20:17:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 500 transitions. [2019-09-03 20:17:56,159 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 500 transitions. Word has length 54 [2019-09-03 20:17:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:56,160 INFO L475 AbstractCegarLoop]: Abstraction has 335 states and 500 transitions. [2019-09-03 20:17:56,160 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:17:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 500 transitions. [2019-09-03 20:17:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-03 20:17:56,161 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:56,162 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:56,162 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:56,162 INFO L82 PathProgramCache]: Analyzing trace with hash 812510334, now seen corresponding path program 3 times [2019-09-03 20:17:56,162 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:56,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:56,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:56,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:17:56,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:56,176 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:56,177 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:56,177 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:56,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:56,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-03 20:17:56,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:17:56,250 WARN L254 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 64 conjunts are in the unsatisfiable core [2019-09-03 20:17:56,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:56,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:17:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-03 20:17:56,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:17:56,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:17:56,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:17:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:17:56,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:17:56,615 INFO L87 Difference]: Start difference. First operand 335 states and 500 transitions. Second operand 14 states. [2019-09-03 20:17:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:57,262 INFO L93 Difference]: Finished difference Result 406 states and 595 transitions. [2019-09-03 20:17:57,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:17:57,262 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-09-03 20:17:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:57,266 INFO L225 Difference]: With dead ends: 406 [2019-09-03 20:17:57,266 INFO L226 Difference]: Without dead ends: 404 [2019-09-03 20:17:57,266 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:17:57,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2019-09-03 20:17:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 394. [2019-09-03 20:17:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2019-09-03 20:17:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 583 transitions. [2019-09-03 20:17:57,310 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 583 transitions. Word has length 54 [2019-09-03 20:17:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:57,311 INFO L475 AbstractCegarLoop]: Abstraction has 394 states and 583 transitions. [2019-09-03 20:17:57,311 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:17:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 583 transitions. [2019-09-03 20:17:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-03 20:17:57,312 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:57,312 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:57,313 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:57,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1769536121, now seen corresponding path program 1 times [2019-09-03 20:17:57,313 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:57,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:57,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:57,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:17:57,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:57,320 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:57,320 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:57,320 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:57,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:17:57,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-03 20:17:57,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-09-03 20:17:57,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:17:57,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:17:57,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:17:57,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:17:57,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:17:57,565 INFO L87 Difference]: Start difference. First operand 394 states and 583 transitions. Second operand 11 states. [2019-09-03 20:17:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:58,144 INFO L93 Difference]: Finished difference Result 483 states and 715 transitions. [2019-09-03 20:17:58,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:17:58,144 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2019-09-03 20:17:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:58,148 INFO L225 Difference]: With dead ends: 483 [2019-09-03 20:17:58,148 INFO L226 Difference]: Without dead ends: 480 [2019-09-03 20:17:58,149 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:17:58,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2019-09-03 20:17:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 469. [2019-09-03 20:17:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-09-03 20:17:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 700 transitions. [2019-09-03 20:17:58,199 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 700 transitions. Word has length 63 [2019-09-03 20:17:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:58,200 INFO L475 AbstractCegarLoop]: Abstraction has 469 states and 700 transitions. [2019-09-03 20:17:58,200 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:17:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 700 transitions. [2019-09-03 20:17:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-03 20:17:58,201 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:58,202 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:58,202 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1962864291, now seen corresponding path program 2 times [2019-09-03 20:17:58,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:58,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:58,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:58,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:17:58,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:58,209 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:58,209 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:58,209 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:58,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:58,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:17:58,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:17:58,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 70 conjunts are in the unsatisfiable core [2019-09-03 20:17:58,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-09-03 20:17:58,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:17:58,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-03 20:17:58,645 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:17:58,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:17:58,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:17:58,646 INFO L87 Difference]: Start difference. First operand 469 states and 700 transitions. Second operand 16 states. [2019-09-03 20:17:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:17:59,643 INFO L93 Difference]: Finished difference Result 563 states and 836 transitions. [2019-09-03 20:17:59,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:17:59,644 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2019-09-03 20:17:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:17:59,648 INFO L225 Difference]: With dead ends: 563 [2019-09-03 20:17:59,648 INFO L226 Difference]: Without dead ends: 560 [2019-09-03 20:17:59,649 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:17:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2019-09-03 20:17:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 481. [2019-09-03 20:17:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2019-09-03 20:17:59,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 712 transitions. [2019-09-03 20:17:59,702 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 712 transitions. Word has length 68 [2019-09-03 20:17:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:17:59,702 INFO L475 AbstractCegarLoop]: Abstraction has 481 states and 712 transitions. [2019-09-03 20:17:59,703 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:17:59,703 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 712 transitions. [2019-09-03 20:17:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-03 20:17:59,704 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:17:59,704 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:17:59,704 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:17:59,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:17:59,705 INFO L82 PathProgramCache]: Analyzing trace with hash -457921536, now seen corresponding path program 2 times [2019-09-03 20:17:59,705 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:17:59,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:17:59,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:59,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:17:59,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:17:59,711 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:17:59,711 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:17:59,711 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:17:59,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:17:59,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:17:59,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:17:59,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:17:59,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:17:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-09-03 20:17:59,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:17:59,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-03 20:17:59,832 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:17:59,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:17:59,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:17:59,833 INFO L87 Difference]: Start difference. First operand 481 states and 712 transitions. Second operand 7 states. [2019-09-03 20:18:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:00,017 INFO L93 Difference]: Finished difference Result 662 states and 1008 transitions. [2019-09-03 20:18:00,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:18:00,018 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2019-09-03 20:18:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:00,023 INFO L225 Difference]: With dead ends: 662 [2019-09-03 20:18:00,023 INFO L226 Difference]: Without dead ends: 660 [2019-09-03 20:18:00,023 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:18:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2019-09-03 20:18:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 585. [2019-09-03 20:18:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2019-09-03 20:18:00,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 898 transitions. [2019-09-03 20:18:00,089 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 898 transitions. Word has length 73 [2019-09-03 20:18:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:00,090 INFO L475 AbstractCegarLoop]: Abstraction has 585 states and 898 transitions. [2019-09-03 20:18:00,090 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:18:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 898 transitions. [2019-09-03 20:18:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-03 20:18:00,091 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:00,092 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:00,092 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:00,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:00,092 INFO L82 PathProgramCache]: Analyzing trace with hash 288574288, now seen corresponding path program 4 times [2019-09-03 20:18:00,092 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:00,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:00,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:00,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:00,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:00,098 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:00,098 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:00,099 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:00,138 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:18:00,163 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:18:00,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:00,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-03 20:18:00,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 47 proven. 32 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-09-03 20:18:00,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:00,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:18:00,235 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:18:00,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:18:00,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:18:00,236 INFO L87 Difference]: Start difference. First operand 585 states and 898 transitions. Second operand 10 states. [2019-09-03 20:18:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:00,484 INFO L93 Difference]: Finished difference Result 611 states and 919 transitions. [2019-09-03 20:18:00,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:18:00,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2019-09-03 20:18:00,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:00,490 INFO L225 Difference]: With dead ends: 611 [2019-09-03 20:18:00,490 INFO L226 Difference]: Without dead ends: 609 [2019-09-03 20:18:00,490 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:18:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-09-03 20:18:00,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 605. [2019-09-03 20:18:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-09-03 20:18:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 913 transitions. [2019-09-03 20:18:00,569 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 913 transitions. Word has length 74 [2019-09-03 20:18:00,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:00,569 INFO L475 AbstractCegarLoop]: Abstraction has 605 states and 913 transitions. [2019-09-03 20:18:00,570 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:18:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 913 transitions. [2019-09-03 20:18:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-03 20:18:00,571 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:00,571 INFO L399 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:00,572 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:00,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1528046097, now seen corresponding path program 1 times [2019-09-03 20:18:00,573 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:00,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:00,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:00,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:00,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:00,578 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:00,578 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:00,578 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:00,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:18:00,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 20:18:00,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Exception during sending of exit command (exit): Stream closed [2019-09-03 20:18:00,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:00,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:18:00,699 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:18:00,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:18:00,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:18:00,700 INFO L87 Difference]: Start difference. First operand 605 states and 913 transitions. Second operand 8 states. [2019-09-03 20:18:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:00,989 INFO L93 Difference]: Finished difference Result 823 states and 1266 transitions. [2019-09-03 20:18:00,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:18:00,990 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2019-09-03 20:18:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:00,998 INFO L225 Difference]: With dead ends: 823 [2019-09-03 20:18:00,999 INFO L226 Difference]: Without dead ends: 821 [2019-09-03 20:18:01,000 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:18:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2019-09-03 20:18:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 708. [2019-09-03 20:18:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2019-09-03 20:18:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1095 transitions. [2019-09-03 20:18:01,198 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1095 transitions. Word has length 76 [2019-09-03 20:18:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:01,199 INFO L475 AbstractCegarLoop]: Abstraction has 708 states and 1095 transitions. [2019-09-03 20:18:01,199 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:18:01,199 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1095 transitions. [2019-09-03 20:18:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-03 20:18:01,202 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:01,202 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:01,202 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:01,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1347050706, now seen corresponding path program 5 times [2019-09-03 20:18:01,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:01,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:01,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:01,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:18:01,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:01,222 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:01,222 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:01,223 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:01,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:18:01,346 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-03 20:18:01,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:01,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-03 20:18:01,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-03 20:18:01,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:01,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:18:01,686 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:18:01,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:18:01,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:18:01,688 INFO L87 Difference]: Start difference. First operand 708 states and 1095 transitions. Second operand 13 states. [2019-09-03 20:18:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:02,603 INFO L93 Difference]: Finished difference Result 916 states and 1414 transitions. [2019-09-03 20:18:02,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:18:02,604 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2019-09-03 20:18:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:02,611 INFO L225 Difference]: With dead ends: 916 [2019-09-03 20:18:02,611 INFO L226 Difference]: Without dead ends: 914 [2019-09-03 20:18:02,616 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:18:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2019-09-03 20:18:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 899. [2019-09-03 20:18:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-09-03 20:18:02,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1397 transitions. [2019-09-03 20:18:02,774 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1397 transitions. Word has length 79 [2019-09-03 20:18:02,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:02,774 INFO L475 AbstractCegarLoop]: Abstraction has 899 states and 1397 transitions. [2019-09-03 20:18:02,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:18:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1397 transitions. [2019-09-03 20:18:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-03 20:18:02,776 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:02,776 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:02,777 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2085410328, now seen corresponding path program 3 times [2019-09-03 20:18:02,777 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:02,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:02,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:02,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:02,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:02,795 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:02,795 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:02,795 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:02,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:02,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:18:02,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:02,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-03 20:18:02,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:03,195 WARN L838 $PredicateComparison]: unable to prove that (and (= c_main_~a~0 c_main_~y~0) (exists ((main_~k~0 Int)) (and (= c_main_~s~0 (+ (- (* main_~k~0 c_main_~r~0)) 0)) (= (+ (- (* c_main_~p~0 main_~k~0)) 1) c_main_~q~0) (= (mod main_~k~0 (- 2)) 0) (= c_main_~x~0 (* c_main_~a~0 main_~k~0)))) (= c_main_~r~0 1) (<= 1 c_main_~x~0) (= c_main_~p~0 0)) is different from false [2019-09-03 20:18:03,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:18:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 68 proven. 5 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:18:03,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:03,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:18:03,291 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:18:03,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:18:03,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=105, Unknown=1, NotChecked=20, Total=156 [2019-09-03 20:18:03,292 INFO L87 Difference]: Start difference. First operand 899 states and 1397 transitions. Second operand 13 states. [2019-09-03 20:18:04,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:04,394 INFO L93 Difference]: Finished difference Result 948 states and 1465 transitions. [2019-09-03 20:18:04,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:18:04,394 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2019-09-03 20:18:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:04,401 INFO L225 Difference]: With dead ends: 948 [2019-09-03 20:18:04,401 INFO L226 Difference]: Without dead ends: 945 [2019-09-03 20:18:04,402 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=240, Unknown=1, NotChecked=32, Total=342 [2019-09-03 20:18:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2019-09-03 20:18:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 936. [2019-09-03 20:18:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2019-09-03 20:18:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1452 transitions. [2019-09-03 20:18:04,530 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1452 transitions. Word has length 85 [2019-09-03 20:18:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:04,531 INFO L475 AbstractCegarLoop]: Abstraction has 936 states and 1452 transitions. [2019-09-03 20:18:04,531 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:18:04,531 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1452 transitions. [2019-09-03 20:18:04,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-03 20:18:04,533 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:04,533 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:04,534 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash -884081496, now seen corresponding path program 6 times [2019-09-03 20:18:04,534 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:04,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:04,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:04,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:04,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:04,538 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:04,539 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:04,539 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:04,553 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:18:04,621 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-03 20:18:04,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:04,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-03 20:18:04,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:04,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:18:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 72 proven. 42 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:18:04,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:04,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:18:04,849 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:18:04,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:18:04,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:18:04,850 INFO L87 Difference]: Start difference. First operand 936 states and 1452 transitions. Second operand 13 states. [2019-09-03 20:18:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:05,349 INFO L93 Difference]: Finished difference Result 955 states and 1472 transitions. [2019-09-03 20:18:05,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:18:05,350 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2019-09-03 20:18:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:05,357 INFO L225 Difference]: With dead ends: 955 [2019-09-03 20:18:05,357 INFO L226 Difference]: Without dead ends: 953 [2019-09-03 20:18:05,358 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:18:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2019-09-03 20:18:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 945. [2019-09-03 20:18:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2019-09-03 20:18:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1462 transitions. [2019-09-03 20:18:05,500 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1462 transitions. Word has length 84 [2019-09-03 20:18:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:05,501 INFO L475 AbstractCegarLoop]: Abstraction has 945 states and 1462 transitions. [2019-09-03 20:18:05,501 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:18:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1462 transitions. [2019-09-03 20:18:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-03 20:18:05,503 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:05,503 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:05,503 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:05,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1317039505, now seen corresponding path program 4 times [2019-09-03 20:18:05,504 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:05,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:05,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:05,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:05,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:05,509 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:05,510 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:05,510 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:05,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:18:05,551 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:18:05,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:05,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-03 20:18:05,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:05,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:18:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 24 proven. 87 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:18:05,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:05,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-03 20:18:05,861 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:18:05,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:18:05,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:18:05,862 INFO L87 Difference]: Start difference. First operand 945 states and 1462 transitions. Second operand 16 states. [2019-09-03 20:18:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:06,909 INFO L93 Difference]: Finished difference Result 1023 states and 1543 transitions. [2019-09-03 20:18:06,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:18:06,909 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2019-09-03 20:18:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:06,925 INFO L225 Difference]: With dead ends: 1023 [2019-09-03 20:18:06,925 INFO L226 Difference]: Without dead ends: 1020 [2019-09-03 20:18:06,926 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:18:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2019-09-03 20:18:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 914. [2019-09-03 20:18:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 914 states. [2019-09-03 20:18:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1372 transitions. [2019-09-03 20:18:07,089 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1372 transitions. Word has length 88 [2019-09-03 20:18:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:07,090 INFO L475 AbstractCegarLoop]: Abstraction has 914 states and 1372 transitions. [2019-09-03 20:18:07,090 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:18:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1372 transitions. [2019-09-03 20:18:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-03 20:18:07,092 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:07,092 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:07,092 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:07,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1481043650, now seen corresponding path program 5 times [2019-09-03 20:18:07,093 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:07,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:07,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:07,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:07,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:07,097 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:07,097 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:07,098 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:07,110 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:07,176 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-03 20:18:07,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:07,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-03 20:18:07,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 22 proven. 93 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-09-03 20:18:07,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:07,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-03 20:18:07,597 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 20:18:07,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 20:18:07,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:18:07,598 INFO L87 Difference]: Start difference. First operand 914 states and 1372 transitions. Second operand 17 states. [2019-09-03 20:18:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:08,913 INFO L93 Difference]: Finished difference Result 1068 states and 1601 transitions. [2019-09-03 20:18:08,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:18:08,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 90 [2019-09-03 20:18:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:08,921 INFO L225 Difference]: With dead ends: 1068 [2019-09-03 20:18:08,921 INFO L226 Difference]: Without dead ends: 1065 [2019-09-03 20:18:08,922 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:18:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-09-03 20:18:09,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 937. [2019-09-03 20:18:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937 states. [2019-09-03 20:18:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1395 transitions. [2019-09-03 20:18:09,126 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1395 transitions. Word has length 90 [2019-09-03 20:18:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:09,127 INFO L475 AbstractCegarLoop]: Abstraction has 937 states and 1395 transitions. [2019-09-03 20:18:09,127 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 20:18:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1395 transitions. [2019-09-03 20:18:09,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-03 20:18:09,129 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:09,129 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:09,130 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:09,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1275934634, now seen corresponding path program 2 times [2019-09-03 20:18:09,130 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:09,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:09,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:09,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:09,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:09,135 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:09,135 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:09,135 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:09,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:18:09,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:18:09,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:09,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-03 20:18:09,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-09-03 20:18:09,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:09,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:18:09,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:18:09,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:18:09,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:18:09,377 INFO L87 Difference]: Start difference. First operand 937 states and 1395 transitions. Second operand 11 states. [2019-09-03 20:18:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:10,084 INFO L93 Difference]: Finished difference Result 1077 states and 1612 transitions. [2019-09-03 20:18:10,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:18:10,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2019-09-03 20:18:10,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:10,091 INFO L225 Difference]: With dead ends: 1077 [2019-09-03 20:18:10,092 INFO L226 Difference]: Without dead ends: 1075 [2019-09-03 20:18:10,093 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:18:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2019-09-03 20:18:10,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1056. [2019-09-03 20:18:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2019-09-03 20:18:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1591 transitions. [2019-09-03 20:18:10,312 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1591 transitions. Word has length 93 [2019-09-03 20:18:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:10,313 INFO L475 AbstractCegarLoop]: Abstraction has 1056 states and 1591 transitions. [2019-09-03 20:18:10,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:18:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1591 transitions. [2019-09-03 20:18:10,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-03 20:18:10,315 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:10,315 INFO L399 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:10,316 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1789236016, now seen corresponding path program 3 times [2019-09-03 20:18:10,316 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:10,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:10,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:10,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:10,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:10,326 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:10,327 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:10,327 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:10,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:10,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-03 20:18:10,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:10,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-03 20:18:10,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:10,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:18:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-09-03 20:18:10,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:10,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:18:10,537 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:18:10,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:18:10,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:18:10,538 INFO L87 Difference]: Start difference. First operand 1056 states and 1591 transitions. Second operand 13 states. [2019-09-03 20:18:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:12,168 INFO L93 Difference]: Finished difference Result 1115 states and 1668 transitions. [2019-09-03 20:18:12,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:18:12,169 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 98 [2019-09-03 20:18:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:12,180 INFO L225 Difference]: With dead ends: 1115 [2019-09-03 20:18:12,181 INFO L226 Difference]: Without dead ends: 1113 [2019-09-03 20:18:12,182 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:18:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2019-09-03 20:18:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1090. [2019-09-03 20:18:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1090 states. [2019-09-03 20:18:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1643 transitions. [2019-09-03 20:18:12,347 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1643 transitions. Word has length 98 [2019-09-03 20:18:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:12,348 INFO L475 AbstractCegarLoop]: Abstraction has 1090 states and 1643 transitions. [2019-09-03 20:18:12,348 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:18:12,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1643 transitions. [2019-09-03 20:18:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-03 20:18:12,351 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:12,351 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:12,351 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash 387878514, now seen corresponding path program 6 times [2019-09-03 20:18:12,352 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:12,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:12,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:12,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:12,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:12,357 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:12,357 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:12,357 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:12,373 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:12,412 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-09-03 20:18:12,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:12,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-03 20:18:12,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2019-09-03 20:18:12,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:12,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:18:12,601 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:18:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:18:12,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:18:12,602 INFO L87 Difference]: Start difference. First operand 1090 states and 1643 transitions. Second operand 10 states. [2019-09-03 20:18:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:13,450 INFO L93 Difference]: Finished difference Result 1659 states and 2474 transitions. [2019-09-03 20:18:13,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:18:13,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2019-09-03 20:18:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:13,457 INFO L225 Difference]: With dead ends: 1659 [2019-09-03 20:18:13,457 INFO L226 Difference]: Without dead ends: 1037 [2019-09-03 20:18:13,462 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:18:13,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2019-09-03 20:18:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 973. [2019-09-03 20:18:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2019-09-03 20:18:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1409 transitions. [2019-09-03 20:18:13,612 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1409 transitions. Word has length 110 [2019-09-03 20:18:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:13,612 INFO L475 AbstractCegarLoop]: Abstraction has 973 states and 1409 transitions. [2019-09-03 20:18:13,612 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:18:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1409 transitions. [2019-09-03 20:18:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-03 20:18:13,615 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:13,615 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:13,615 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:13,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:13,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1914877872, now seen corresponding path program 7 times [2019-09-03 20:18:13,616 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:13,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:13,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:13,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:13,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:13,621 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:13,621 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:13,621 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:13,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:18:13,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-03 20:18:13,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2019-09-03 20:18:13,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:13,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:18:13,992 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:18:13,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:18:13,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:18:13,993 INFO L87 Difference]: Start difference. First operand 973 states and 1409 transitions. Second operand 14 states. [2019-09-03 20:18:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:15,009 INFO L93 Difference]: Finished difference Result 1093 states and 1576 transitions. [2019-09-03 20:18:15,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:18:15,009 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 110 [2019-09-03 20:18:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:15,014 INFO L225 Difference]: With dead ends: 1093 [2019-09-03 20:18:15,014 INFO L226 Difference]: Without dead ends: 1090 [2019-09-03 20:18:15,015 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:18:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2019-09-03 20:18:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 980. [2019-09-03 20:18:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2019-09-03 20:18:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1415 transitions. [2019-09-03 20:18:15,180 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1415 transitions. Word has length 110 [2019-09-03 20:18:15,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:15,181 INFO L475 AbstractCegarLoop]: Abstraction has 980 states and 1415 transitions. [2019-09-03 20:18:15,181 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:18:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1415 transitions. [2019-09-03 20:18:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-03 20:18:15,184 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:15,184 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:15,184 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:15,184 INFO L82 PathProgramCache]: Analyzing trace with hash -294682017, now seen corresponding path program 8 times [2019-09-03 20:18:15,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:15,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:15,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:15,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:18:15,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:15,189 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:15,189 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:15,189 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:15,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:15,245 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:18:15,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:15,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 78 conjunts are in the unsatisfiable core [2019-09-03 20:18:15,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 31 proven. 95 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-09-03 20:18:15,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:15,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-03 20:18:15,679 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:18:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:18:15,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:18:15,679 INFO L87 Difference]: Start difference. First operand 980 states and 1415 transitions. Second operand 18 states. [2019-09-03 20:18:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:17,067 INFO L93 Difference]: Finished difference Result 1135 states and 1641 transitions. [2019-09-03 20:18:17,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 20:18:17,068 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2019-09-03 20:18:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:17,073 INFO L225 Difference]: With dead ends: 1135 [2019-09-03 20:18:17,073 INFO L226 Difference]: Without dead ends: 1132 [2019-09-03 20:18:17,074 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:18:17,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2019-09-03 20:18:17,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 994. [2019-09-03 20:18:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2019-09-03 20:18:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1432 transitions. [2019-09-03 20:18:17,226 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1432 transitions. Word has length 112 [2019-09-03 20:18:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:17,226 INFO L475 AbstractCegarLoop]: Abstraction has 994 states and 1432 transitions. [2019-09-03 20:18:17,226 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:18:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1432 transitions. [2019-09-03 20:18:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-03 20:18:17,229 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:17,229 INFO L399 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:17,229 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:17,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:17,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1936311221, now seen corresponding path program 4 times [2019-09-03 20:18:17,230 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:17,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:17,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:17,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:17,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:17,235 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:17,235 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:17,235 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:17,257 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:18:17,284 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:18:17,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:17,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-03 20:18:17,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:17,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:18:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 34 proven. 146 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2019-09-03 20:18:17,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:17,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-03 20:18:17,576 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:18:17,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:18:17,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:18:17,577 INFO L87 Difference]: Start difference. First operand 994 states and 1432 transitions. Second operand 16 states. [2019-09-03 20:18:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:18,772 INFO L93 Difference]: Finished difference Result 1385 states and 2047 transitions. [2019-09-03 20:18:18,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:18:18,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 115 [2019-09-03 20:18:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:18,779 INFO L225 Difference]: With dead ends: 1385 [2019-09-03 20:18:18,779 INFO L226 Difference]: Without dead ends: 1383 [2019-09-03 20:18:18,780 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:18:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2019-09-03 20:18:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1125. [2019-09-03 20:18:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1125 states. [2019-09-03 20:18:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1614 transitions. [2019-09-03 20:18:19,026 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1614 transitions. Word has length 115 [2019-09-03 20:18:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:19,027 INFO L475 AbstractCegarLoop]: Abstraction has 1125 states and 1614 transitions. [2019-09-03 20:18:19,027 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:18:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1614 transitions. [2019-09-03 20:18:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-03 20:18:19,030 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:19,030 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:19,030 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:19,030 INFO L82 PathProgramCache]: Analyzing trace with hash -382802030, now seen corresponding path program 9 times [2019-09-03 20:18:19,030 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:19,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:19,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:19,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:19,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:19,039 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:19,039 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:19,039 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:19,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:19,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:18:19,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:19,097 WARN L254 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 78 conjunts are in the unsatisfiable core [2019-09-03 20:18:19,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:19,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:18:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 78 proven. 39 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:18:19,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:19,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-03 20:18:19,530 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:18:19,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:18:19,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:18:19,531 INFO L87 Difference]: Start difference. First operand 1125 states and 1614 transitions. Second operand 16 states. [2019-09-03 20:18:20,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:20,822 INFO L93 Difference]: Finished difference Result 1305 states and 1857 transitions. [2019-09-03 20:18:20,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:18:20,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 115 [2019-09-03 20:18:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:20,829 INFO L225 Difference]: With dead ends: 1305 [2019-09-03 20:18:20,830 INFO L226 Difference]: Without dead ends: 1302 [2019-09-03 20:18:20,830 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:18:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2019-09-03 20:18:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1256. [2019-09-03 20:18:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1256 states. [2019-09-03 20:18:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1797 transitions. [2019-09-03 20:18:21,145 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1797 transitions. Word has length 115 [2019-09-03 20:18:21,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:21,145 INFO L475 AbstractCegarLoop]: Abstraction has 1256 states and 1797 transitions. [2019-09-03 20:18:21,146 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:18:21,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1797 transitions. [2019-09-03 20:18:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-03 20:18:21,151 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:21,152 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:21,152 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1115368890, now seen corresponding path program 10 times [2019-09-03 20:18:21,153 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:21,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:21,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:21,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:21,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:21,159 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:21,159 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:21,159 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:21,172 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:21,207 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:18:21,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:21,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 70 conjunts are in the unsatisfiable core [2019-09-03 20:18:21,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:21,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:18:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 36 proven. 134 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2019-09-03 20:18:21,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:21,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-03 20:18:21,550 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:18:21,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:18:21,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:18:21,551 INFO L87 Difference]: Start difference. First operand 1256 states and 1797 transitions. Second operand 18 states. [2019-09-03 20:18:22,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:22,720 INFO L93 Difference]: Finished difference Result 1616 states and 2333 transitions. [2019-09-03 20:18:22,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:18:22,720 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 115 [2019-09-03 20:18:22,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:22,729 INFO L225 Difference]: With dead ends: 1616 [2019-09-03 20:18:22,730 INFO L226 Difference]: Without dead ends: 1613 [2019-09-03 20:18:22,731 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:18:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2019-09-03 20:18:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1446. [2019-09-03 20:18:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1446 states. [2019-09-03 20:18:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 2094 transitions. [2019-09-03 20:18:23,016 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 2094 transitions. Word has length 115 [2019-09-03 20:18:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:23,017 INFO L475 AbstractCegarLoop]: Abstraction has 1446 states and 2094 transitions. [2019-09-03 20:18:23,017 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:18:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 2094 transitions. [2019-09-03 20:18:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-03 20:18:23,020 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:23,020 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:23,020 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:23,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:23,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1057144847, now seen corresponding path program 11 times [2019-09-03 20:18:23,020 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:23,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:23,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:23,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:23,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:23,025 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:23,025 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:23,025 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:23,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:18:23,099 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-03 20:18:23,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:23,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-03 20:18:23,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 40 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-09-03 20:18:23,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:23,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:18:23,457 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:18:23,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:18:23,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:18:23,458 INFO L87 Difference]: Start difference. First operand 1446 states and 2094 transitions. Second operand 15 states. [2019-09-03 20:18:24,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:24,656 INFO L93 Difference]: Finished difference Result 1617 states and 2343 transitions. [2019-09-03 20:18:24,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:18:24,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 132 [2019-09-03 20:18:24,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:24,665 INFO L225 Difference]: With dead ends: 1617 [2019-09-03 20:18:24,665 INFO L226 Difference]: Without dead ends: 1614 [2019-09-03 20:18:24,666 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:18:24,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2019-09-03 20:18:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1473. [2019-09-03 20:18:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1473 states. [2019-09-03 20:18:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2124 transitions. [2019-09-03 20:18:24,910 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2124 transitions. Word has length 132 [2019-09-03 20:18:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:24,911 INFO L475 AbstractCegarLoop]: Abstraction has 1473 states and 2124 transitions. [2019-09-03 20:18:24,911 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:18:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2124 transitions. [2019-09-03 20:18:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-03 20:18:24,913 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:24,913 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:24,914 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:24,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:24,914 INFO L82 PathProgramCache]: Analyzing trace with hash 935066063, now seen corresponding path program 12 times [2019-09-03 20:18:24,914 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:24,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:24,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:24,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:24,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:24,919 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:24,919 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:24,919 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:24,932 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:24,972 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-03 20:18:24,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:24,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 64 conjunts are in the unsatisfiable core [2019-09-03 20:18:24,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:25,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:18:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 93 proven. 37 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2019-09-03 20:18:25,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:25,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:18:25,244 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:18:25,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:18:25,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:18:25,244 INFO L87 Difference]: Start difference. First operand 1473 states and 2124 transitions. Second operand 13 states. [2019-09-03 20:18:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:26,126 INFO L93 Difference]: Finished difference Result 1782 states and 2570 transitions. [2019-09-03 20:18:26,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:18:26,127 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 132 [2019-09-03 20:18:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:26,136 INFO L225 Difference]: With dead ends: 1782 [2019-09-03 20:18:26,136 INFO L226 Difference]: Without dead ends: 1779 [2019-09-03 20:18:26,137 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:18:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2019-09-03 20:18:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1508. [2019-09-03 20:18:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1508 states. [2019-09-03 20:18:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 2157 transitions. [2019-09-03 20:18:26,410 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 2157 transitions. Word has length 132 [2019-09-03 20:18:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:26,410 INFO L475 AbstractCegarLoop]: Abstraction has 1508 states and 2157 transitions. [2019-09-03 20:18:26,410 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:18:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 2157 transitions. [2019-09-03 20:18:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-03 20:18:26,413 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:26,413 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:26,413 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:26,414 INFO L82 PathProgramCache]: Analyzing trace with hash 498070720, now seen corresponding path program 13 times [2019-09-03 20:18:26,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:26,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:26,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:26,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:26,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:26,418 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:26,418 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:26,419 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:26,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:18:26,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 82 conjunts are in the unsatisfiable core [2019-09-03 20:18:26,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 39 proven. 131 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Exception during sending of exit command (exit): Stream closed [2019-09-03 20:18:27,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:27,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-03 20:18:27,112 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:18:27,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:18:27,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:18:27,113 INFO L87 Difference]: Start difference. First operand 1508 states and 2157 transitions. Second operand 19 states. [2019-09-03 20:18:29,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:29,107 INFO L93 Difference]: Finished difference Result 1700 states and 2444 transitions. [2019-09-03 20:18:29,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:18:29,108 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2019-09-03 20:18:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:29,145 INFO L225 Difference]: With dead ends: 1700 [2019-09-03 20:18:29,146 INFO L226 Difference]: Without dead ends: 1697 [2019-09-03 20:18:29,149 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:18:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2019-09-03 20:18:29,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1522. [2019-09-03 20:18:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1522 states. [2019-09-03 20:18:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2174 transitions. [2019-09-03 20:18:29,825 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2174 transitions. Word has length 134 [2019-09-03 20:18:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:29,826 INFO L475 AbstractCegarLoop]: Abstraction has 1522 states and 2174 transitions. [2019-09-03 20:18:29,826 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:18:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2174 transitions. [2019-09-03 20:18:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-03 20:18:29,833 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:29,833 INFO L399 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:29,833 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1073062444, now seen corresponding path program 5 times [2019-09-03 20:18:29,834 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:29,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:29,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:29,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:18:29,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:29,845 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:29,846 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:29,846 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:29,870 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:29,950 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-03 20:18:29,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:29,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-03 20:18:29,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 42 proven. 83 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:18:30,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:30,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:18:30,282 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:18:30,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:18:30,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:18:30,283 INFO L87 Difference]: Start difference. First operand 1522 states and 2174 transitions. Second operand 13 states. [2019-09-03 20:18:31,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:31,608 INFO L93 Difference]: Finished difference Result 1701 states and 2450 transitions. [2019-09-03 20:18:31,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:18:31,608 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2019-09-03 20:18:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:31,614 INFO L225 Difference]: With dead ends: 1701 [2019-09-03 20:18:31,614 INFO L226 Difference]: Without dead ends: 1699 [2019-09-03 20:18:31,615 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:18:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2019-09-03 20:18:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1546. [2019-09-03 20:18:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2019-09-03 20:18:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2207 transitions. [2019-09-03 20:18:31,959 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2207 transitions. Word has length 137 [2019-09-03 20:18:31,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:31,960 INFO L475 AbstractCegarLoop]: Abstraction has 1546 states and 2207 transitions. [2019-09-03 20:18:31,960 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:18:31,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2207 transitions. [2019-09-03 20:18:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-03 20:18:31,963 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:31,963 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:31,963 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:31,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2005214757, now seen corresponding path program 14 times [2019-09-03 20:18:31,964 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:31,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:31,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:31,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:31,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:31,968 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:31,968 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:31,968 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:31,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:18:32,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:18:32,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:32,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 86 conjunts are in the unsatisfiable core [2019-09-03 20:18:32,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 39 proven. 138 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-09-03 20:18:32,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:32,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-03 20:18:32,612 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:18:32,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:18:32,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:18:32,613 INFO L87 Difference]: Start difference. First operand 1546 states and 2207 transitions. Second operand 20 states. [2019-09-03 20:18:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:34,380 INFO L93 Difference]: Finished difference Result 1715 states and 2451 transitions. [2019-09-03 20:18:34,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:18:34,380 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 137 [2019-09-03 20:18:34,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:34,384 INFO L225 Difference]: With dead ends: 1715 [2019-09-03 20:18:34,384 INFO L226 Difference]: Without dead ends: 1712 [2019-09-03 20:18:34,385 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:18:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2019-09-03 20:18:34,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1557. [2019-09-03 20:18:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1557 states. [2019-09-03 20:18:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2217 transitions. [2019-09-03 20:18:34,645 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2217 transitions. Word has length 137 [2019-09-03 20:18:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:34,646 INFO L475 AbstractCegarLoop]: Abstraction has 1557 states and 2217 transitions. [2019-09-03 20:18:34,646 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:18:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2217 transitions. [2019-09-03 20:18:34,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-03 20:18:34,648 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:34,648 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:34,648 INFO L418 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:34,648 INFO L82 PathProgramCache]: Analyzing trace with hash -13003847, now seen corresponding path program 15 times [2019-09-03 20:18:34,649 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:34,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:34,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:34,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:34,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:34,652 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:34,652 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:34,652 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:34,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:18:34,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 20:18:34,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:34,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-03 20:18:34,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:35,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:18:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 131 proven. 64 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:18:35,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:35,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-03 20:18:35,092 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 20:18:35,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 20:18:35,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:18:35,093 INFO L87 Difference]: Start difference. First operand 1557 states and 2217 transitions. Second operand 17 states. [2019-09-03 20:18:36,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:36,207 INFO L93 Difference]: Finished difference Result 1852 states and 2646 transitions. [2019-09-03 20:18:36,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:18:36,207 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 137 [2019-09-03 20:18:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:36,213 INFO L225 Difference]: With dead ends: 1852 [2019-09-03 20:18:36,213 INFO L226 Difference]: Without dead ends: 1849 [2019-09-03 20:18:36,215 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:18:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2019-09-03 20:18:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1542. [2019-09-03 20:18:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-09-03 20:18:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2197 transitions. [2019-09-03 20:18:36,674 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2197 transitions. Word has length 137 [2019-09-03 20:18:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:36,675 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2197 transitions. [2019-09-03 20:18:36,675 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 20:18:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2197 transitions. [2019-09-03 20:18:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-03 20:18:36,678 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:36,678 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:36,678 INFO L418 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:36,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:36,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1273965065, now seen corresponding path program 16 times [2019-09-03 20:18:36,679 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:36,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:36,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:36,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:36,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:36,683 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:36,683 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:36,683 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:18:36,702 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:36,742 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:18:36,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:36,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 96 conjunts are in the unsatisfiable core [2019-09-03 20:18:36,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:37,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:18:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 896 backedges. 67 proven. 175 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2019-09-03 20:18:37,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:37,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-03 20:18:37,158 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:18:37,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:18:37,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:18:37,158 INFO L87 Difference]: Start difference. First operand 1542 states and 2197 transitions. Second operand 21 states. [2019-09-03 20:18:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:18:38,621 INFO L93 Difference]: Finished difference Result 1839 states and 2657 transitions. [2019-09-03 20:18:38,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:18:38,621 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 142 [2019-09-03 20:18:38,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:18:38,628 INFO L225 Difference]: With dead ends: 1839 [2019-09-03 20:18:38,628 INFO L226 Difference]: Without dead ends: 1836 [2019-09-03 20:18:38,630 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 20:18:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2019-09-03 20:18:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1751. [2019-09-03 20:18:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1751 states. [2019-09-03 20:18:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2553 transitions. [2019-09-03 20:18:39,197 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2553 transitions. Word has length 142 [2019-09-03 20:18:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:18:39,197 INFO L475 AbstractCegarLoop]: Abstraction has 1751 states and 2553 transitions. [2019-09-03 20:18:39,197 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:18:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2553 transitions. [2019-09-03 20:18:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-03 20:18:39,200 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:18:39,200 INFO L399 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:18:39,200 INFO L418 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:18:39,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:18:39,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1983100819, now seen corresponding path program 6 times [2019-09-03 20:18:39,200 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:18:39,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:18:39,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:39,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:18:39,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:18:39,204 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:18:39,204 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:18:39,205 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:18:39,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:18:39,261 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 20:18:39,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:39,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 69 conjunts are in the unsatisfiable core [2019-09-03 20:18:39,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:41,404 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2019-09-03 20:18:43,427 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2019-09-03 20:18:45,476 WARN L188 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2019-09-03 20:18:47,530 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 22 [2019-09-03 20:18:47,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:18:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1063 backedges. 84 proven. 170 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2019-09-03 20:18:47,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:18:47,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-03 20:18:47,628 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:18:47,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:18:47,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:18:47,629 INFO L87 Difference]: Start difference. First operand 1751 states and 2553 transitions. Second operand 16 states. [2019-09-03 20:18:52,252 WARN L188 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2019-09-03 20:18:56,352 WARN L188 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2019-09-03 20:19:00,418 WARN L188 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2019-09-03 20:19:04,735 WARN L188 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2019-09-03 20:19:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:05,272 INFO L93 Difference]: Finished difference Result 1796 states and 2600 transitions. [2019-09-03 20:19:05,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:19:05,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 145 [2019-09-03 20:19:05,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:05,278 INFO L225 Difference]: With dead ends: 1796 [2019-09-03 20:19:05,278 INFO L226 Difference]: Without dead ends: 1794 [2019-09-03 20:19:05,279 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:19:05,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2019-09-03 20:19:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1771. [2019-09-03 20:19:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1771 states. [2019-09-03 20:19:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2575 transitions. [2019-09-03 20:19:05,671 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2575 transitions. Word has length 145 [2019-09-03 20:19:05,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:05,671 INFO L475 AbstractCegarLoop]: Abstraction has 1771 states and 2575 transitions. [2019-09-03 20:19:05,671 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:19:05,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2575 transitions. [2019-09-03 20:19:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-09-03 20:19:05,674 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:05,674 INFO L399 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:05,674 INFO L418 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:05,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1117612542, now seen corresponding path program 7 times [2019-09-03 20:19:05,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:05,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:05,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:05,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:05,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:05,678 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:05,678 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:05,678 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:05,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:19:05,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 20:19:05,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 75 proven. 56 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2019-09-03 20:19:05,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:05,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:19:05,835 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:19:05,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:19:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:19:05,836 INFO L87 Difference]: Start difference. First operand 1771 states and 2575 transitions. Second operand 9 states. [2019-09-03 20:19:06,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:06,599 INFO L93 Difference]: Finished difference Result 2305 states and 3475 transitions. [2019-09-03 20:19:06,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:19:06,599 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-09-03 20:19:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:06,606 INFO L225 Difference]: With dead ends: 2305 [2019-09-03 20:19:06,607 INFO L226 Difference]: Without dead ends: 2303 [2019-09-03 20:19:06,608 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:19:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2019-09-03 20:19:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2149. [2019-09-03 20:19:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2149 states. [2019-09-03 20:19:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 3254 transitions. [2019-09-03 20:19:07,352 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 3254 transitions. Word has length 152 [2019-09-03 20:19:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:07,352 INFO L475 AbstractCegarLoop]: Abstraction has 2149 states and 3254 transitions. [2019-09-03 20:19:07,353 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:19:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 3254 transitions. [2019-09-03 20:19:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-03 20:19:07,355 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:07,355 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:07,355 INFO L418 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash -957654830, now seen corresponding path program 17 times [2019-09-03 20:19:07,356 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:07,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:07,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:07,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:07,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:07,360 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:07,361 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:07,361 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:07,376 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:19:07,428 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-03 20:19:07,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:07,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 20:19:07,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 399 proven. 60 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2019-09-03 20:19:07,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:07,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:19:07,626 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:19:07,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:19:07,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:19:07,627 INFO L87 Difference]: Start difference. First operand 2149 states and 3254 transitions. Second operand 9 states. [2019-09-03 20:19:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:09,801 INFO L93 Difference]: Finished difference Result 3339 states and 5064 transitions. [2019-09-03 20:19:09,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:19:09,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 154 [2019-09-03 20:19:09,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:09,810 INFO L225 Difference]: With dead ends: 3339 [2019-09-03 20:19:09,811 INFO L226 Difference]: Without dead ends: 2178 [2019-09-03 20:19:09,817 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:19:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2019-09-03 20:19:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 2063. [2019-09-03 20:19:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2063 states. [2019-09-03 20:19:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 3071 transitions. [2019-09-03 20:19:10,343 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 3071 transitions. Word has length 154 [2019-09-03 20:19:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:10,343 INFO L475 AbstractCegarLoop]: Abstraction has 2063 states and 3071 transitions. [2019-09-03 20:19:10,343 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:19:10,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 3071 transitions. [2019-09-03 20:19:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-03 20:19:10,346 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:10,346 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:10,346 INFO L418 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:10,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1444136912, now seen corresponding path program 18 times [2019-09-03 20:19:10,346 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:10,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:10,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:10,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:10,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:10,351 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:10,351 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:10,351 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:10,366 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:19:10,406 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-03 20:19:10,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:10,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 68 conjunts are in the unsatisfiable core [2019-09-03 20:19:10,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:10,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 113 proven. 67 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2019-09-03 20:19:10,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:10,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:19:10,670 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:19:10,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:19:10,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:19:10,670 INFO L87 Difference]: Start difference. First operand 2063 states and 3071 transitions. Second operand 14 states. [2019-09-03 20:19:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:12,085 INFO L93 Difference]: Finished difference Result 2460 states and 3690 transitions. [2019-09-03 20:19:12,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:19:12,085 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 154 [2019-09-03 20:19:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:12,091 INFO L225 Difference]: With dead ends: 2460 [2019-09-03 20:19:12,092 INFO L226 Difference]: Without dead ends: 2457 [2019-09-03 20:19:12,092 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:19:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2019-09-03 20:19:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2059. [2019-09-03 20:19:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2019-09-03 20:19:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 3062 transitions. [2019-09-03 20:19:12,697 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 3062 transitions. Word has length 154 [2019-09-03 20:19:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:12,697 INFO L475 AbstractCegarLoop]: Abstraction has 2059 states and 3062 transitions. [2019-09-03 20:19:12,697 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:19:12,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 3062 transitions. [2019-09-03 20:19:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-03 20:19:12,701 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:12,701 INFO L399 BasicCegarLoop]: trace histogram [26, 25, 25, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:12,702 INFO L418 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:12,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1495464269, now seen corresponding path program 8 times [2019-09-03 20:19:12,702 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:12,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:12,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:12,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:12,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:12,707 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:12,707 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:12,707 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:19:12,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:12,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:19:12,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:12,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-03 20:19:12,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 50 proven. 116 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-09-03 20:19:13,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:13,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:19:13,085 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:19:13,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:19:13,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:19:13,086 INFO L87 Difference]: Start difference. First operand 2059 states and 3062 transitions. Second operand 14 states. [2019-09-03 20:19:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:14,837 INFO L93 Difference]: Finished difference Result 2311 states and 3465 transitions. [2019-09-03 20:19:14,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:19:14,838 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 159 [2019-09-03 20:19:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:14,842 INFO L225 Difference]: With dead ends: 2311 [2019-09-03 20:19:14,843 INFO L226 Difference]: Without dead ends: 2309 [2019-09-03 20:19:14,843 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:19:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-09-03 20:19:15,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2076. [2019-09-03 20:19:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2019-09-03 20:19:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3087 transitions. [2019-09-03 20:19:15,338 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3087 transitions. Word has length 159 [2019-09-03 20:19:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:15,338 INFO L475 AbstractCegarLoop]: Abstraction has 2076 states and 3087 transitions. [2019-09-03 20:19:15,338 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:19:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3087 transitions. [2019-09-03 20:19:15,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-03 20:19:15,341 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:15,341 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:15,341 INFO L418 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:15,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2073503386, now seen corresponding path program 19 times [2019-09-03 20:19:15,342 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:15,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:15,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:15,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:15,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:15,346 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:15,346 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:15,346 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:15,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:19:15,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 90 conjunts are in the unsatisfiable core [2019-09-03 20:19:15,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 47 proven. 180 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2019-09-03 20:19:16,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:16,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-03 20:19:16,037 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:19:16,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:19:16,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:19:16,038 INFO L87 Difference]: Start difference. First operand 2076 states and 3087 transitions. Second operand 21 states. [2019-09-03 20:19:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:18,104 INFO L93 Difference]: Finished difference Result 2308 states and 3438 transitions. [2019-09-03 20:19:18,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 20:19:18,105 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 159 [2019-09-03 20:19:18,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:18,108 INFO L225 Difference]: With dead ends: 2308 [2019-09-03 20:19:18,108 INFO L226 Difference]: Without dead ends: 2305 [2019-09-03 20:19:18,109 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2019-09-03 20:19:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2019-09-03 20:19:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 2084. [2019-09-03 20:19:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2084 states. [2019-09-03 20:19:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3093 transitions. [2019-09-03 20:19:18,572 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3093 transitions. Word has length 159 [2019-09-03 20:19:18,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:18,573 INFO L475 AbstractCegarLoop]: Abstraction has 2084 states and 3093 transitions. [2019-09-03 20:19:18,573 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:19:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3093 transitions. [2019-09-03 20:19:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-03 20:19:18,575 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:18,576 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:18,576 INFO L418 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2083741959, now seen corresponding path program 20 times [2019-09-03 20:19:18,576 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:18,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:18,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:18,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:18,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:18,584 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:18,585 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:18,585 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:18,597 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:19:18,659 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:19:18,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:18,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 93 conjunts are in the unsatisfiable core [2019-09-03 20:19:18,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:19,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 48 proven. 120 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2019-09-03 20:19:19,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:19,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-03 20:19:19,163 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:19:19,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:19:19,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:19:19,164 INFO L87 Difference]: Start difference. First operand 2084 states and 3093 transitions. Second operand 19 states. [2019-09-03 20:19:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:21,121 INFO L93 Difference]: Finished difference Result 2331 states and 3464 transitions. [2019-09-03 20:19:21,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:19:21,121 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 162 [2019-09-03 20:19:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:21,126 INFO L225 Difference]: With dead ends: 2331 [2019-09-03 20:19:21,126 INFO L226 Difference]: Without dead ends: 2328 [2019-09-03 20:19:21,127 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2019-09-03 20:19:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2019-09-03 20:19:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2261. [2019-09-03 20:19:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2261 states. [2019-09-03 20:19:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 3382 transitions. [2019-09-03 20:19:21,664 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 3382 transitions. Word has length 162 [2019-09-03 20:19:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:21,664 INFO L475 AbstractCegarLoop]: Abstraction has 2261 states and 3382 transitions. [2019-09-03 20:19:21,665 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:19:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 3382 transitions. [2019-09-03 20:19:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-03 20:19:21,667 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:21,667 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:21,667 INFO L418 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:21,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:21,668 INFO L82 PathProgramCache]: Analyzing trace with hash -219014427, now seen corresponding path program 21 times [2019-09-03 20:19:21,668 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:21,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:21,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:21,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:21,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:21,672 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:21,673 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:21,673 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:21,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:19:21,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 20:19:21,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:21,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 88 conjunts are in the unsatisfiable core [2019-09-03 20:19:21,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:22,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 131 proven. 88 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2019-09-03 20:19:22,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:22,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-03 20:19:22,346 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:19:22,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:19:22,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:19:22,347 INFO L87 Difference]: Start difference. First operand 2261 states and 3382 transitions. Second operand 19 states. [2019-09-03 20:19:30,103 WARN L188 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2019-09-03 20:19:30,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:30,717 INFO L93 Difference]: Finished difference Result 2571 states and 3834 transitions. [2019-09-03 20:19:30,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:19:30,718 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 162 [2019-09-03 20:19:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:30,722 INFO L225 Difference]: With dead ends: 2571 [2019-09-03 20:19:30,722 INFO L226 Difference]: Without dead ends: 2568 [2019-09-03 20:19:30,723 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:19:30,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2019-09-03 20:19:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1943. [2019-09-03 20:19:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1943 states. [2019-09-03 20:19:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 2844 transitions. [2019-09-03 20:19:31,160 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 2844 transitions. Word has length 162 [2019-09-03 20:19:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:31,160 INFO L475 AbstractCegarLoop]: Abstraction has 1943 states and 2844 transitions. [2019-09-03 20:19:31,160 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:19:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 2844 transitions. [2019-09-03 20:19:31,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-03 20:19:31,162 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:31,163 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:31,163 INFO L418 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:31,163 INFO L82 PathProgramCache]: Analyzing trace with hash -133013571, now seen corresponding path program 22 times [2019-09-03 20:19:31,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:31,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:31,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:31,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:31,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:31,166 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:31,167 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:31,167 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:31,177 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:19:31,220 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:19:31,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:31,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 82 conjunts are in the unsatisfiable core [2019-09-03 20:19:31,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:31,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 52 proven. 246 refuted. 0 times theorem prover too weak. 974 trivial. 0 not checked. [2019-09-03 20:19:31,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:31,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-03 20:19:31,910 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:19:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:19:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:19:31,911 INFO L87 Difference]: Start difference. First operand 1943 states and 2844 transitions. Second operand 21 states. [2019-09-03 20:19:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:33,943 INFO L93 Difference]: Finished difference Result 2159 states and 3089 transitions. [2019-09-03 20:19:33,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:19:33,943 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 162 [2019-09-03 20:19:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:33,947 INFO L225 Difference]: With dead ends: 2159 [2019-09-03 20:19:33,947 INFO L226 Difference]: Without dead ends: 2156 [2019-09-03 20:19:33,948 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:19:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2019-09-03 20:19:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 2065. [2019-09-03 20:19:34,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2019-09-03 20:19:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 2993 transitions. [2019-09-03 20:19:34,469 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 2993 transitions. Word has length 162 [2019-09-03 20:19:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:34,470 INFO L475 AbstractCegarLoop]: Abstraction has 2065 states and 2993 transitions. [2019-09-03 20:19:34,470 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:19:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 2993 transitions. [2019-09-03 20:19:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-09-03 20:19:34,472 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:34,473 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:34,473 INFO L418 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:34,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1641554154, now seen corresponding path program 23 times [2019-09-03 20:19:34,473 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:34,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:34,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:34,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:34,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:34,476 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:34,477 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:34,477 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:34,488 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:19:34,921 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-03 20:19:34,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:34,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 97 conjunts are in the unsatisfiable core [2019-09-03 20:19:34,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:35,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 82 proven. 224 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2019-09-03 20:19:35,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:35,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 20:19:35,634 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:19:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:19:35,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:19:35,634 INFO L87 Difference]: Start difference. First operand 2065 states and 2993 transitions. Second operand 24 states. [2019-09-03 20:19:37,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:37,776 INFO L93 Difference]: Finished difference Result 2560 states and 3757 transitions. [2019-09-03 20:19:37,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:19:37,776 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 164 [2019-09-03 20:19:37,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:37,782 INFO L225 Difference]: With dead ends: 2560 [2019-09-03 20:19:37,782 INFO L226 Difference]: Without dead ends: 2557 [2019-09-03 20:19:37,783 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2019-09-03 20:19:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2019-09-03 20:19:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2183. [2019-09-03 20:19:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2183 states. [2019-09-03 20:19:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3162 transitions. [2019-09-03 20:19:38,422 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3162 transitions. Word has length 164 [2019-09-03 20:19:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:38,422 INFO L475 AbstractCegarLoop]: Abstraction has 2183 states and 3162 transitions. [2019-09-03 20:19:38,422 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:19:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3162 transitions. [2019-09-03 20:19:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-09-03 20:19:38,426 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:38,426 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:38,427 INFO L418 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:38,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:38,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2116353871, now seen corresponding path program 24 times [2019-09-03 20:19:38,427 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:38,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:38,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:38,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:38,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:38,431 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:38,431 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:38,431 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:38,441 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:19:41,559 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-03 20:19:41,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:41,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 113 conjunts are in the unsatisfiable core [2019-09-03 20:19:41,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:43,974 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 38 [2019-09-03 20:19:46,022 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 37 [2019-09-03 20:19:48,073 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 39 [2019-09-03 20:19:50,167 WARN L188 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 36 [2019-09-03 20:19:50,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 187 proven. 113 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2019-09-03 20:19:50,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:50,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-03 20:19:50,291 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:19:50,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:19:50,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:19:50,292 INFO L87 Difference]: Start difference. First operand 2183 states and 3162 transitions. Second operand 21 states. [2019-09-03 20:19:53,146 WARN L188 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 40 [2019-09-03 20:19:57,707 WARN L188 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2019-09-03 20:20:02,310 WARN L188 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2019-09-03 20:20:03,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:03,094 INFO L93 Difference]: Finished difference Result 2659 states and 3878 transitions. [2019-09-03 20:20:03,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:20:03,095 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 167 [2019-09-03 20:20:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:03,099 INFO L225 Difference]: With dead ends: 2659 [2019-09-03 20:20:03,100 INFO L226 Difference]: Without dead ends: 2656 [2019-09-03 20:20:03,100 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2019-09-03 20:20:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-09-03 20:20:03,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2344. [2019-09-03 20:20:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2344 states. [2019-09-03 20:20:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3411 transitions. [2019-09-03 20:20:03,745 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3411 transitions. Word has length 167 [2019-09-03 20:20:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:03,745 INFO L475 AbstractCegarLoop]: Abstraction has 2344 states and 3411 transitions. [2019-09-03 20:20:03,745 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:20:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3411 transitions. [2019-09-03 20:20:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-03 20:20:03,748 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:03,748 INFO L399 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:03,748 INFO L418 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1626673276, now seen corresponding path program 9 times [2019-09-03 20:20:03,749 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:03,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:03,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:03,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:03,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:03,752 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:03,752 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:03,752 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:03,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:03,793 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-03 20:20:03,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:03,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-03 20:20:03,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:05,976 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 19 [2019-09-03 20:20:07,998 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2019-09-03 20:20:08,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 146 proven. 83 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-09-03 20:20:08,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:08,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:20:08,053 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:20:08,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:20:08,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:20:08,053 INFO L87 Difference]: Start difference. First operand 2344 states and 3411 transitions. Second operand 14 states. [2019-09-03 20:20:10,529 WARN L188 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2019-09-03 20:20:12,836 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 18 [2019-09-03 20:20:14,868 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2019-09-03 20:20:17,234 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2019-09-03 20:20:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:18,167 INFO L93 Difference]: Finished difference Result 2785 states and 4109 transitions. [2019-09-03 20:20:18,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:20:18,168 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 172 [2019-09-03 20:20:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:18,173 INFO L225 Difference]: With dead ends: 2785 [2019-09-03 20:20:18,174 INFO L226 Difference]: Without dead ends: 2783 [2019-09-03 20:20:18,175 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:20:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2019-09-03 20:20:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2654. [2019-09-03 20:20:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-09-03 20:20:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3923 transitions. [2019-09-03 20:20:19,069 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3923 transitions. Word has length 172 [2019-09-03 20:20:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:19,069 INFO L475 AbstractCegarLoop]: Abstraction has 2654 states and 3923 transitions. [2019-09-03 20:20:19,069 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:20:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3923 transitions. [2019-09-03 20:20:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-09-03 20:20:19,073 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:19,073 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:19,073 INFO L418 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2013595601, now seen corresponding path program 25 times [2019-09-03 20:20:19,073 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:19,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:19,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:19,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:19,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:19,077 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:19,077 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:19,077 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:19,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:19,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-03 20:20:19,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 56 proven. 135 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2019-09-03 20:20:19,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:19,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-03 20:20:19,618 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 20:20:19,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 20:20:19,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:20:19,618 INFO L87 Difference]: Start difference. First operand 2654 states and 3923 transitions. Second operand 17 states. [2019-09-03 20:20:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:21,917 INFO L93 Difference]: Finished difference Result 2992 states and 4446 transitions. [2019-09-03 20:20:21,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:20:21,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 176 [2019-09-03 20:20:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:21,922 INFO L225 Difference]: With dead ends: 2992 [2019-09-03 20:20:21,922 INFO L226 Difference]: Without dead ends: 2989 [2019-09-03 20:20:21,923 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2019-09-03 20:20:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2019-09-03 20:20:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2948. [2019-09-03 20:20:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2948 states. [2019-09-03 20:20:22,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 4392 transitions. [2019-09-03 20:20:22,867 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 4392 transitions. Word has length 176 [2019-09-03 20:20:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:22,867 INFO L475 AbstractCegarLoop]: Abstraction has 2948 states and 4392 transitions. [2019-09-03 20:20:22,867 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 20:20:22,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 4392 transitions. [2019-09-03 20:20:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-09-03 20:20:22,871 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:22,871 INFO L399 BasicCegarLoop]: trace histogram [30, 29, 29, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:22,871 INFO L418 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:22,872 INFO L82 PathProgramCache]: Analyzing trace with hash 235524526, now seen corresponding path program 10 times [2019-09-03 20:20:22,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:22,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:22,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:22,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:22,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:22,875 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:22,875 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:22,875 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:22,888 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:20:22,925 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:20:22,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:22,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 68 conjunts are in the unsatisfiable core [2019-09-03 20:20:22,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:23,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1837 backedges. 58 proven. 317 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2019-09-03 20:20:23,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:23,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-03 20:20:23,314 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:20:23,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:20:23,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:20:23,315 INFO L87 Difference]: Start difference. First operand 2948 states and 4392 transitions. Second operand 19 states. [2019-09-03 20:20:51,619 WARN L188 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2019-09-03 20:20:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:53,785 INFO L93 Difference]: Finished difference Result 3666 states and 5544 transitions. [2019-09-03 20:20:53,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:20:53,785 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 181 [2019-09-03 20:20:53,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:53,792 INFO L225 Difference]: With dead ends: 3666 [2019-09-03 20:20:53,792 INFO L226 Difference]: Without dead ends: 3664 [2019-09-03 20:20:53,793 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=145, Invalid=971, Unknown=6, NotChecked=0, Total=1122 [2019-09-03 20:20:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3664 states. [2019-09-03 20:20:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3664 to 3203. [2019-09-03 20:20:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3203 states. [2019-09-03 20:20:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4759 transitions. [2019-09-03 20:20:54,881 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4759 transitions. Word has length 181 [2019-09-03 20:20:54,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:54,881 INFO L475 AbstractCegarLoop]: Abstraction has 3203 states and 4759 transitions. [2019-09-03 20:20:54,881 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:20:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4759 transitions. [2019-09-03 20:20:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-09-03 20:20:54,885 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:54,885 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:54,885 INFO L418 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1746700939, now seen corresponding path program 26 times [2019-09-03 20:20:54,886 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:54,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:54,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:54,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:54,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:54,889 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:54,889 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:54,890 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:54,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:20:54,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:20:54,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:54,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 93 conjunts are in the unsatisfiable core [2019-09-03 20:20:54,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1714 backedges. 56 proven. 146 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2019-09-03 20:20:55,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:55,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-03 20:20:55,550 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:20:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:20:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:20:55,551 INFO L87 Difference]: Start difference. First operand 3203 states and 4759 transitions. Second operand 19 states. [2019-09-03 20:20:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:58,816 INFO L93 Difference]: Finished difference Result 3788 states and 5661 transitions. [2019-09-03 20:20:58,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:20:58,817 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 181 [2019-09-03 20:20:58,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:58,822 INFO L225 Difference]: With dead ends: 3788 [2019-09-03 20:20:58,823 INFO L226 Difference]: Without dead ends: 3785 [2019-09-03 20:20:58,823 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2019-09-03 20:20:58,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2019-09-03 20:21:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3511. [2019-09-03 20:21:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3511 states. [2019-09-03 20:21:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5244 transitions. [2019-09-03 20:21:00,087 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5244 transitions. Word has length 181 [2019-09-03 20:21:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:00,087 INFO L475 AbstractCegarLoop]: Abstraction has 3511 states and 5244 transitions. [2019-09-03 20:21:00,088 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:21:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5244 transitions. [2019-09-03 20:21:00,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-09-03 20:21:00,093 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:00,093 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:00,093 INFO L418 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:00,093 INFO L82 PathProgramCache]: Analyzing trace with hash 590539451, now seen corresponding path program 27 times [2019-09-03 20:21:00,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:00,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:00,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:00,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:00,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:00,097 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:00,097 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:00,097 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:00,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:21:00,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 20:21:00,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:00,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 98 conjunts are in the unsatisfiable core [2019-09-03 20:21:00,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:00,810 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-09-03 20:21:01,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1714 backedges. 260 proven. 147 refuted. 2 times theorem prover too weak. 1305 trivial. 0 not checked. [2019-09-03 20:21:01,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:01,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-03 20:21:01,146 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:21:01,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:21:01,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=313, Unknown=3, NotChecked=0, Total=380 [2019-09-03 20:21:01,146 INFO L87 Difference]: Start difference. First operand 3511 states and 5244 transitions. Second operand 20 states. [2019-09-03 20:21:06,180 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 38 [2019-09-03 20:21:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:07,740 INFO L93 Difference]: Finished difference Result 4098 states and 6158 transitions. [2019-09-03 20:21:07,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:21:07,740 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 181 [2019-09-03 20:21:07,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:07,747 INFO L225 Difference]: With dead ends: 4098 [2019-09-03 20:21:07,747 INFO L226 Difference]: Without dead ends: 4095 [2019-09-03 20:21:07,748 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=110, Invalid=585, Unknown=7, NotChecked=0, Total=702 [2019-09-03 20:21:07,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2019-09-03 20:21:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 3589. [2019-09-03 20:21:09,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3589 states. [2019-09-03 20:21:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 5334 transitions. [2019-09-03 20:21:09,145 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 5334 transitions. Word has length 181 [2019-09-03 20:21:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:09,146 INFO L475 AbstractCegarLoop]: Abstraction has 3589 states and 5334 transitions. [2019-09-03 20:21:09,146 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:21:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 5334 transitions. [2019-09-03 20:21:09,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-03 20:21:09,151 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:09,151 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:09,151 INFO L418 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:09,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:09,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1034339526, now seen corresponding path program 28 times [2019-09-03 20:21:09,151 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:09,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:09,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:09,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:09,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:09,156 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:09,156 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:09,156 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:09,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:21:09,234 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:21:09,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:09,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 94 conjunts are in the unsatisfiable core [2019-09-03 20:21:09,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:09,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 75 proven. 293 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2019-09-03 20:21:09,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:09,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-03 20:21:09,737 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:21:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:21:09,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:21:09,737 INFO L87 Difference]: Start difference. First operand 3589 states and 5334 transitions. Second operand 23 states. [2019-09-03 20:21:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:12,725 INFO L93 Difference]: Finished difference Result 3796 states and 5572 transitions. [2019-09-03 20:21:12,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 20:21:12,726 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 184 [2019-09-03 20:21:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:12,731 INFO L225 Difference]: With dead ends: 3796 [2019-09-03 20:21:12,731 INFO L226 Difference]: Without dead ends: 3793 [2019-09-03 20:21:12,732 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 20:21:12,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2019-09-03 20:21:14,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3683. [2019-09-03 20:21:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3683 states. [2019-09-03 20:21:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 5449 transitions. [2019-09-03 20:21:14,180 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 5449 transitions. Word has length 184 [2019-09-03 20:21:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:14,180 INFO L475 AbstractCegarLoop]: Abstraction has 3683 states and 5449 transitions. [2019-09-03 20:21:14,180 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:21:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 5449 transitions. [2019-09-03 20:21:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-03 20:21:14,186 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:14,186 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:14,186 INFO L418 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:14,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1364698396, now seen corresponding path program 29 times [2019-09-03 20:21:14,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:14,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:14,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:14,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:14,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:14,190 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:14,191 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:14,191 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:14,200 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:21:14,429 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-03 20:21:14,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:14,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-03 20:21:14,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:14,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 91 proven. 202 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2019-09-03 20:21:15,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:15,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-03 20:21:15,106 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:21:15,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:21:15,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:21:15,107 INFO L87 Difference]: Start difference. First operand 3683 states and 5449 transitions. Second operand 23 states. [2019-09-03 20:21:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:18,780 INFO L93 Difference]: Finished difference Result 3980 states and 5889 transitions. [2019-09-03 20:21:18,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:21:18,781 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 184 [2019-09-03 20:21:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:18,788 INFO L225 Difference]: With dead ends: 3980 [2019-09-03 20:21:18,788 INFO L226 Difference]: Without dead ends: 3977 [2019-09-03 20:21:18,789 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 20:21:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2019-09-03 20:21:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 3691. [2019-09-03 20:21:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3691 states. [2019-09-03 20:21:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3691 states to 3691 states and 5455 transitions. [2019-09-03 20:21:20,288 INFO L78 Accepts]: Start accepts. Automaton has 3691 states and 5455 transitions. Word has length 184 [2019-09-03 20:21:20,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:20,288 INFO L475 AbstractCegarLoop]: Abstraction has 3691 states and 5455 transitions. [2019-09-03 20:21:20,288 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:21:20,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3691 states and 5455 transitions. [2019-09-03 20:21:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-03 20:21:20,293 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:20,293 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:20,293 INFO L418 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:20,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:20,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1648924638, now seen corresponding path program 30 times [2019-09-03 20:21:20,293 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:20,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:20,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:20,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:20,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:20,296 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:20,296 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:20,296 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:21:20,314 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:20,373 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-03 20:21:20,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:20,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 81 conjunts are in the unsatisfiable core [2019-09-03 20:21:20,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:20,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 165 proven. 106 refuted. 0 times theorem prover too weak. 1453 trivial. 0 not checked. [2019-09-03 20:21:20,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:20,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:21:20,645 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:21:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:21:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:21:20,646 INFO L87 Difference]: Start difference. First operand 3691 states and 5455 transitions. Second operand 14 states. [2019-09-03 20:21:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:25,832 INFO L93 Difference]: Finished difference Result 4261 states and 6344 transitions. [2019-09-03 20:21:25,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:21:25,832 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 184 [2019-09-03 20:21:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:25,841 INFO L225 Difference]: With dead ends: 4261 [2019-09-03 20:21:25,841 INFO L226 Difference]: Without dead ends: 4258 [2019-09-03 20:21:25,843 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:21:25,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2019-09-03 20:21:27,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 3650. [2019-09-03 20:21:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3650 states. [2019-09-03 20:21:27,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 5402 transitions. [2019-09-03 20:21:27,348 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 5402 transitions. Word has length 184 [2019-09-03 20:21:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:27,349 INFO L475 AbstractCegarLoop]: Abstraction has 3650 states and 5402 transitions. [2019-09-03 20:21:27,349 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:21:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 5402 transitions. [2019-09-03 20:21:27,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-03 20:21:27,354 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:27,354 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:27,354 INFO L418 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:27,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2023508235, now seen corresponding path program 31 times [2019-09-03 20:21:27,355 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:27,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:27,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:27,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:27,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:27,358 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:27,358 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:27,358 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:27,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:21:27,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-03 20:21:27,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:27,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 54 proven. 320 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2019-09-03 20:21:28,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:28,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-03 20:21:28,133 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 20:21:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 20:21:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:21:28,133 INFO L87 Difference]: Start difference. First operand 3650 states and 5402 transitions. Second operand 25 states. [2019-09-03 20:21:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:31,955 INFO L93 Difference]: Finished difference Result 3967 states and 5890 transitions. [2019-09-03 20:21:31,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-03 20:21:31,955 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 186 [2019-09-03 20:21:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:31,964 INFO L225 Difference]: With dead ends: 3967 [2019-09-03 20:21:31,964 INFO L226 Difference]: Without dead ends: 3964 [2019-09-03 20:21:31,966 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:21:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3964 states. [2019-09-03 20:21:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3964 to 3696. [2019-09-03 20:21:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3696 states. [2019-09-03 20:21:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 5476 transitions. [2019-09-03 20:21:33,511 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 5476 transitions. Word has length 186 [2019-09-03 20:21:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:33,511 INFO L475 AbstractCegarLoop]: Abstraction has 3696 states and 5476 transitions. [2019-09-03 20:21:33,511 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 20:21:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 5476 transitions. [2019-09-03 20:21:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-03 20:21:33,515 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:33,515 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:33,515 INFO L418 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:33,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:33,515 INFO L82 PathProgramCache]: Analyzing trace with hash 392221899, now seen corresponding path program 32 times [2019-09-03 20:21:33,515 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:33,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:33,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:33,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:33,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:33,518 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:33,518 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:33,518 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:33,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:21:33,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:21:33,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:33,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-03 20:21:33,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:34,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 54 proven. 320 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2019-09-03 20:21:34,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:34,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-03 20:21:34,323 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 20:21:34,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 20:21:34,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:21:34,324 INFO L87 Difference]: Start difference. First operand 3696 states and 5476 transitions. Second operand 25 states. [2019-09-03 20:21:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:38,266 INFO L93 Difference]: Finished difference Result 4290 states and 6393 transitions. [2019-09-03 20:21:38,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-03 20:21:38,267 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 186 [2019-09-03 20:21:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:38,275 INFO L225 Difference]: With dead ends: 4290 [2019-09-03 20:21:38,275 INFO L226 Difference]: Without dead ends: 4287 [2019-09-03 20:21:38,276 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:21:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4287 states. [2019-09-03 20:21:39,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4287 to 4014. [2019-09-03 20:21:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4014 states. [2019-09-03 20:21:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 5973 transitions. [2019-09-03 20:21:40,001 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 5973 transitions. Word has length 186 [2019-09-03 20:21:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:40,002 INFO L475 AbstractCegarLoop]: Abstraction has 4014 states and 5973 transitions. [2019-09-03 20:21:40,002 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 20:21:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 5973 transitions. [2019-09-03 20:21:40,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-03 20:21:40,006 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:40,006 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:40,006 INFO L418 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:40,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2045804094, now seen corresponding path program 33 times [2019-09-03 20:21:40,007 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:40,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:40,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:40,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:40,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:40,010 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:40,011 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:40,011 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:40,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:22:05,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-03 20:22:05,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:05,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 113 conjunts are in the unsatisfiable core [2019-09-03 20:22:05,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:05,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 230 proven. 138 refuted. 0 times theorem prover too weak. 1374 trivial. 0 not checked. [2019-09-03 20:22:06,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:06,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-03 20:22:06,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:22:06,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:22:06,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:22:06,134 INFO L87 Difference]: Start difference. First operand 4014 states and 5973 transitions. Second operand 23 states. [2019-09-03 20:22:07,784 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2019-09-03 20:22:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:10,893 INFO L93 Difference]: Finished difference Result 4494 states and 6676 transitions. [2019-09-03 20:22:10,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:22:10,893 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 189 [2019-09-03 20:22:10,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:10,902 INFO L225 Difference]: With dead ends: 4494 [2019-09-03 20:22:10,902 INFO L226 Difference]: Without dead ends: 4491 [2019-09-03 20:22:10,903 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:22:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2019-09-03 20:22:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 3938. [2019-09-03 20:22:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3938 states. [2019-09-03 20:22:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 5812 transitions. [2019-09-03 20:22:12,593 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 5812 transitions. Word has length 189 [2019-09-03 20:22:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:12,593 INFO L475 AbstractCegarLoop]: Abstraction has 3938 states and 5812 transitions. [2019-09-03 20:22:12,593 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:22:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 5812 transitions. [2019-09-03 20:22:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-03 20:22:12,597 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:12,597 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:12,597 INFO L418 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:12,597 INFO L82 PathProgramCache]: Analyzing trace with hash -849234994, now seen corresponding path program 34 times [2019-09-03 20:22:12,597 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:12,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:12,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:12,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:12,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:12,600 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:12,600 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:12,601 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:22:12,610 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:22:12,657 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:22:12,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:12,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-03 20:22:12,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:13,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 101 proven. 283 refuted. 0 times theorem prover too weak. 1358 trivial. 0 not checked. [2019-09-03 20:22:13,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:13,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 20:22:13,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:22:13,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:22:13,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:22:13,525 INFO L87 Difference]: Start difference. First operand 3938 states and 5812 transitions. Second operand 24 states. [2019-09-03 20:22:16,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:16,955 INFO L93 Difference]: Finished difference Result 4093 states and 5968 transitions. [2019-09-03 20:22:16,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 20:22:16,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 189 [2019-09-03 20:22:16,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:16,962 INFO L225 Difference]: With dead ends: 4093 [2019-09-03 20:22:16,962 INFO L226 Difference]: Without dead ends: 4090 [2019-09-03 20:22:16,964 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:22:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2019-09-03 20:22:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3928. [2019-09-03 20:22:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2019-09-03 20:22:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5801 transitions. [2019-09-03 20:22:18,767 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5801 transitions. Word has length 189 [2019-09-03 20:22:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:18,768 INFO L475 AbstractCegarLoop]: Abstraction has 3928 states and 5801 transitions. [2019-09-03 20:22:18,768 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:22:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5801 transitions. [2019-09-03 20:22:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-09-03 20:22:18,772 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:18,772 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:18,772 INFO L418 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash -398853966, now seen corresponding path program 35 times [2019-09-03 20:22:18,773 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:18,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:18,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:18,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:18,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:18,780 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:18,780 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:18,781 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:22:18,792 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:22:18,848 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-09-03 20:22:18,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:18,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 20:22:18,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2225 backedges. 555 proven. 126 refuted. 0 times theorem prover too weak. 1544 trivial. 0 not checked. [2019-09-03 20:22:20,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:20,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:22:20,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:22:20,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:22:20,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:22:20,509 INFO L87 Difference]: Start difference. First operand 3928 states and 5801 transitions. Second operand 11 states. [2019-09-03 20:23:09,749 WARN L188 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-09-03 20:23:12,738 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-09-03 20:23:34,623 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2019-09-03 20:23:41,980 WARN L188 SmtUtils]: Spent 4.56 s on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2019-09-03 20:24:12,959 WARN L188 SmtUtils]: Spent 3.82 s on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-09-03 20:24:23,337 WARN L188 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2019-09-03 20:24:39,728 WARN L188 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2019-09-03 20:25:10,397 WARN L188 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 26 [2019-09-03 20:25:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:25:11,942 INFO L93 Difference]: Finished difference Result 6077 states and 9072 transitions. [2019-09-03 20:25:11,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:25:11,942 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 198 [2019-09-03 20:25:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:25:11,949 INFO L225 Difference]: With dead ends: 6077 [2019-09-03 20:25:11,949 INFO L226 Difference]: Without dead ends: 4316 [2019-09-03 20:25:11,956 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=106, Invalid=261, Unknown=13, NotChecked=0, Total=380 [2019-09-03 20:25:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4316 states. [2019-09-03 20:25:13,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4316 to 3956. [2019-09-03 20:25:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3956 states. [2019-09-03 20:25:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3956 states to 3956 states and 5819 transitions. [2019-09-03 20:25:13,831 INFO L78 Accepts]: Start accepts. Automaton has 3956 states and 5819 transitions. Word has length 198 [2019-09-03 20:25:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:25:13,831 INFO L475 AbstractCegarLoop]: Abstraction has 3956 states and 5819 transitions. [2019-09-03 20:25:13,831 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:25:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3956 states and 5819 transitions. [2019-09-03 20:25:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-09-03 20:25:13,835 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:25:13,836 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:25:13,836 INFO L418 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:25:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:25:13,836 INFO L82 PathProgramCache]: Analyzing trace with hash -34611824, now seen corresponding path program 36 times [2019-09-03 20:25:13,836 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:25:13,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:25:13,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:13,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:25:13,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:13,839 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:25:13,840 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:25:13,840 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:25:13,848 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:25:13,902 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-03 20:25:13,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:25:13,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 68 conjunts are in the unsatisfiable core [2019-09-03 20:25:13,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:25:14,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:25:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2225 backedges. 124 proven. 152 refuted. 0 times theorem prover too weak. 1949 trivial. 0 not checked. [2019-09-03 20:25:14,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:25:14,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:25:14,256 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:25:14,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:25:14,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:25:14,257 INFO L87 Difference]: Start difference. First operand 3956 states and 5819 transitions. Second operand 15 states. [2019-09-03 20:25:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:25:17,557 INFO L93 Difference]: Finished difference Result 4585 states and 6780 transitions. [2019-09-03 20:25:17,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 20:25:17,558 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 198 [2019-09-03 20:25:17,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:25:17,567 INFO L225 Difference]: With dead ends: 4585 [2019-09-03 20:25:17,567 INFO L226 Difference]: Without dead ends: 4582 [2019-09-03 20:25:17,569 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:25:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2019-09-03 20:25:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 3735. [2019-09-03 20:25:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3735 states. [2019-09-03 20:25:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 5447 transitions. [2019-09-03 20:25:19,362 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 5447 transitions. Word has length 198 [2019-09-03 20:25:19,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:25:19,362 INFO L475 AbstractCegarLoop]: Abstraction has 3735 states and 5447 transitions. [2019-09-03 20:25:19,362 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:25:19,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 5447 transitions. [2019-09-03 20:25:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-09-03 20:25:19,366 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:25:19,366 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:25:19,366 INFO L418 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:25:19,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:25:19,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1620846484, now seen corresponding path program 37 times [2019-09-03 20:25:19,366 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:25:19,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:25:19,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:19,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:25:19,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:19,369 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:25:19,369 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:25:19,369 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:25:19,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:25:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:25:19,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 133 conjunts are in the unsatisfiable core [2019-09-03 20:25:19,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:25:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 54 proven. 355 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:25:20,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:25:20,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-03 20:25:20,454 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 20:25:20,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 20:25:20,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:25:20,454 INFO L87 Difference]: Start difference. First operand 3735 states and 5447 transitions. Second operand 28 states. [2019-09-03 20:25:23,420 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2019-09-03 20:25:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:25:25,429 INFO L93 Difference]: Finished difference Result 4310 states and 6324 transitions. [2019-09-03 20:25:25,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-03 20:25:25,430 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 194 [2019-09-03 20:25:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:25:25,435 INFO L225 Difference]: With dead ends: 4310 [2019-09-03 20:25:25,435 INFO L226 Difference]: Without dead ends: 4307 [2019-09-03 20:25:25,436 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 20:25:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4307 states. [2019-09-03 20:25:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4307 to 4024. [2019-09-03 20:25:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4024 states. [2019-09-03 20:25:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 5887 transitions. [2019-09-03 20:25:27,372 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 5887 transitions. Word has length 194 [2019-09-03 20:25:27,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:25:27,372 INFO L475 AbstractCegarLoop]: Abstraction has 4024 states and 5887 transitions. [2019-09-03 20:25:27,372 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 20:25:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 5887 transitions. [2019-09-03 20:25:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-09-03 20:25:27,376 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:25:27,376 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:25:27,376 INFO L418 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:25:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:25:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1402917718, now seen corresponding path program 38 times [2019-09-03 20:25:27,377 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:25:27,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:25:27,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:27,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:25:27,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:27,380 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:25:27,380 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:25:27,380 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:25:27,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:25:27,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:25:27,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:25:27,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 97 conjunts are in the unsatisfiable core [2019-09-03 20:25:27,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:25:28,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:25:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2236 backedges. 64 proven. 188 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2019-09-03 20:25:28,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:25:28,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-03 20:25:28,195 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:25:28,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:25:28,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:25:28,195 INFO L87 Difference]: Start difference. First operand 4024 states and 5887 transitions. Second operand 20 states. [2019-09-03 20:25:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:25:32,097 INFO L93 Difference]: Finished difference Result 4356 states and 6391 transitions. [2019-09-03 20:25:32,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:25:32,098 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 203 [2019-09-03 20:25:32,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:25:32,103 INFO L225 Difference]: With dead ends: 4356 [2019-09-03 20:25:32,103 INFO L226 Difference]: Without dead ends: 4353 [2019-09-03 20:25:32,104 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:25:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4353 states. [2019-09-03 20:25:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4353 to 4028. [2019-09-03 20:25:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4028 states. [2019-09-03 20:25:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 5890 transitions. [2019-09-03 20:25:34,067 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 5890 transitions. Word has length 203 [2019-09-03 20:25:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:25:34,068 INFO L475 AbstractCegarLoop]: Abstraction has 4028 states and 5890 transitions. [2019-09-03 20:25:34,068 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:25:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 5890 transitions. [2019-09-03 20:25:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-09-03 20:25:34,072 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:25:34,072 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:25:34,072 INFO L418 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:25:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:25:34,073 INFO L82 PathProgramCache]: Analyzing trace with hash -228368618, now seen corresponding path program 39 times [2019-09-03 20:25:34,073 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:25:34,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:25:34,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:34,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:25:34,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:34,076 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:25:34,076 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:25:34,076 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:25:34,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:25:34,193 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 20:25:34,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:25:34,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-03 20:25:34,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:25:35,129 WARN L188 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-09-03 20:25:35,294 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-09-03 20:25:35,852 WARN L188 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-09-03 20:25:40,442 WARN L188 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2019-09-03 20:25:40,795 WARN L188 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-09-03 20:25:41,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:25:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2236 backedges. 356 proven. 193 refuted. 0 times theorem prover too weak. 1687 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Exception during sending of exit command (exit): Stream closed [2019-09-03 20:25:41,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:25:41,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-03 20:25:41,325 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:25:41,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:25:41,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=326, Unknown=1, NotChecked=0, Total=380 [2019-09-03 20:25:41,325 INFO L87 Difference]: Start difference. First operand 4028 states and 5890 transitions. Second operand 20 states. [2019-09-03 20:25:42,095 WARN L188 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2019-09-03 20:25:44,380 WARN L188 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2019-09-03 20:25:48,098 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-09-03 20:25:51,298 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2019-09-03 20:26:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:26:11,251 INFO L93 Difference]: Finished difference Result 5117 states and 7562 transitions. [2019-09-03 20:26:11,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:26:11,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 203 [2019-09-03 20:26:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:26:11,261 INFO L225 Difference]: With dead ends: 5117 [2019-09-03 20:26:11,261 INFO L226 Difference]: Without dead ends: 5114 [2019-09-03 20:26:11,262 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=130, Invalid=793, Unknown=7, NotChecked=0, Total=930 [2019-09-03 20:26:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2019-09-03 20:26:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 4423. [2019-09-03 20:26:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4423 states. [2019-09-03 20:26:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6505 transitions. [2019-09-03 20:26:13,544 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6505 transitions. Word has length 203 [2019-09-03 20:26:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:26:13,545 INFO L475 AbstractCegarLoop]: Abstraction has 4423 states and 6505 transitions. [2019-09-03 20:26:13,545 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:26:13,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6505 transitions. [2019-09-03 20:26:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-03 20:26:13,551 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:26:13,551 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:26:13,551 INFO L418 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:26:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:26:13,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1122082841, now seen corresponding path program 40 times [2019-09-03 20:26:13,552 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:26:13,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:26:13,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:13,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:26:13,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:13,556 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:26:13,556 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:26:13,556 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:26:13,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:26:13,616 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:26:13,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:26:13,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 98 conjunts are in the unsatisfiable core [2019-09-03 20:26:13,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:26:14,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:26:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 83 proven. 359 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2019-09-03 20:26:14,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:26:14,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 20:26:14,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:26:14,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:26:14,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:26:14,243 INFO L87 Difference]: Start difference. First operand 4423 states and 6505 transitions. Second operand 24 states. [2019-09-03 20:26:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:26:18,541 INFO L93 Difference]: Finished difference Result 4766 states and 6978 transitions. [2019-09-03 20:26:18,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:26:18,541 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 206 [2019-09-03 20:26:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:26:18,547 INFO L225 Difference]: With dead ends: 4766 [2019-09-03 20:26:18,547 INFO L226 Difference]: Without dead ends: 4763 [2019-09-03 20:26:18,548 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 20:26:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2019-09-03 20:26:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 4650. [2019-09-03 20:26:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4650 states. [2019-09-03 20:26:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 6843 transitions. [2019-09-03 20:26:21,106 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 6843 transitions. Word has length 206 [2019-09-03 20:26:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:26:21,106 INFO L475 AbstractCegarLoop]: Abstraction has 4650 states and 6843 transitions. [2019-09-03 20:26:21,106 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:26:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 6843 transitions. [2019-09-03 20:26:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-03 20:26:21,110 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:26:21,110 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:26:21,110 INFO L418 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:26:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:26:21,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1608564923, now seen corresponding path program 41 times [2019-09-03 20:26:21,111 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:26:21,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:26:21,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:21,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:26:21,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:21,114 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:26:21,114 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:26:21,114 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:26:21,126 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:26:21,382 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-03 20:26:21,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:26:21,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 108 conjunts are in the unsatisfiable core [2019-09-03 20:26:21,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:26:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 87 proven. 268 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2019-09-03 20:26:22,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:26:22,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 20:26:22,323 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:26:22,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:26:22,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:26:22,324 INFO L87 Difference]: Start difference. First operand 4650 states and 6843 transitions. Second operand 24 states. [2019-09-03 20:26:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:26:27,656 INFO L93 Difference]: Finished difference Result 4998 states and 7376 transitions. [2019-09-03 20:26:27,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:26:27,656 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 206 [2019-09-03 20:26:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:26:27,664 INFO L225 Difference]: With dead ends: 4998 [2019-09-03 20:26:27,664 INFO L226 Difference]: Without dead ends: 4995 [2019-09-03 20:26:27,665 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 20:26:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4995 states. [2019-09-03 20:26:30,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4995 to 4723. [2019-09-03 20:26:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4723 states. [2019-09-03 20:26:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 6947 transitions. [2019-09-03 20:26:30,313 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 6947 transitions. Word has length 206 [2019-09-03 20:26:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:26:30,313 INFO L475 AbstractCegarLoop]: Abstraction has 4723 states and 6947 transitions. [2019-09-03 20:26:30,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:26:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 6947 transitions. [2019-09-03 20:26:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-03 20:26:30,320 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:26:30,320 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:26:30,320 INFO L418 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:26:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:26:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash 811655679, now seen corresponding path program 42 times [2019-09-03 20:26:30,320 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:26:30,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:26:30,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:30,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:26:30,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:30,325 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:26:30,325 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:26:30,325 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:26:30,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:26:30,398 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-09-03 20:26:30,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:26:30,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 86 conjunts are in the unsatisfiable core [2019-09-03 20:26:30,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:26:30,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:26:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 248 proven. 236 refuted. 0 times theorem prover too weak. 1762 trivial. 0 not checked. [2019-09-03 20:26:30,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:26:30,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-03 20:26:30,829 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:26:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:26:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:26:30,830 INFO L87 Difference]: Start difference. First operand 4723 states and 6947 transitions. Second operand 18 states. [2019-09-03 20:26:34,945 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 35 [2019-09-03 20:26:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:26:37,153 INFO L93 Difference]: Finished difference Result 5886 states and 8730 transitions. [2019-09-03 20:26:37,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:26:37,153 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 206 [2019-09-03 20:26:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:26:37,163 INFO L225 Difference]: With dead ends: 5886 [2019-09-03 20:26:37,163 INFO L226 Difference]: Without dead ends: 5883 [2019-09-03 20:26:37,165 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=103, Invalid=546, Unknown=1, NotChecked=0, Total=650 [2019-09-03 20:26:37,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5883 states. [2019-09-03 20:26:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5883 to 5466. [2019-09-03 20:26:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5466 states. [2019-09-03 20:26:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 8134 transitions. [2019-09-03 20:26:40,236 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 8134 transitions. Word has length 206 [2019-09-03 20:26:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:26:40,236 INFO L475 AbstractCegarLoop]: Abstraction has 5466 states and 8134 transitions. [2019-09-03 20:26:40,237 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:26:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 8134 transitions. [2019-09-03 20:26:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-03 20:26:40,241 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:26:40,241 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:26:40,241 INFO L418 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:26:40,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:26:40,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1069163875, now seen corresponding path program 43 times [2019-09-03 20:26:40,241 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:26:40,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:26:40,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:40,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:26:40,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:40,245 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:26:40,245 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:26:40,245 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:26:40,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:26:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:26:40,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-03 20:26:40,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:26:40,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:26:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 64 proven. 198 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2019-09-03 20:26:40,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:26:40,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-03 20:26:40,988 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:26:40,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:26:40,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:26:40,988 INFO L87 Difference]: Start difference. First operand 5466 states and 8134 transitions. Second operand 21 states. [2019-09-03 20:26:46,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:26:46,305 INFO L93 Difference]: Finished difference Result 5811 states and 8659 transitions. [2019-09-03 20:26:46,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 20:26:46,305 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 206 [2019-09-03 20:26:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:26:46,314 INFO L225 Difference]: With dead ends: 5811 [2019-09-03 20:26:46,314 INFO L226 Difference]: Without dead ends: 5808 [2019-09-03 20:26:46,315 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:26:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2019-09-03 20:26:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5511. [2019-09-03 20:26:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5511 states. [2019-09-03 20:26:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 8206 transitions. [2019-09-03 20:26:49,823 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 8206 transitions. Word has length 206 [2019-09-03 20:26:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:26:49,824 INFO L475 AbstractCegarLoop]: Abstraction has 5511 states and 8206 transitions. [2019-09-03 20:26:49,824 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:26:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 8206 transitions. [2019-09-03 20:26:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-09-03 20:26:49,829 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:26:49,829 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:26:49,829 INFO L418 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:26:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:26:49,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1263062420, now seen corresponding path program 44 times [2019-09-03 20:26:49,830 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:26:49,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:26:49,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:49,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:26:49,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:49,833 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:26:49,833 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:26:49,833 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:26:49,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:26:49,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:26:49,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:26:49,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-03 20:26:49,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:26:50,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:26:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 62 proven. 386 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2019-09-03 20:26:50,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:26:50,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-03 20:26:50,716 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-03 20:26:50,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-03 20:26:50,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:26:50,717 INFO L87 Difference]: Start difference. First operand 5511 states and 8206 transitions. Second operand 26 states. [2019-09-03 20:26:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:26:56,946 INFO L93 Difference]: Finished difference Result 5841 states and 8714 transitions. [2019-09-03 20:26:56,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-03 20:26:56,947 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 208 [2019-09-03 20:26:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:26:56,957 INFO L225 Difference]: With dead ends: 5841 [2019-09-03 20:26:56,957 INFO L226 Difference]: Without dead ends: 5834 [2019-09-03 20:26:56,959 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 20:26:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2019-09-03 20:27:00,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 5512. [2019-09-03 20:27:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5512 states. [2019-09-03 20:27:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5512 states to 5512 states and 8205 transitions. [2019-09-03 20:27:00,067 INFO L78 Accepts]: Start accepts. Automaton has 5512 states and 8205 transitions. Word has length 208 [2019-09-03 20:27:00,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:27:00,068 INFO L475 AbstractCegarLoop]: Abstraction has 5512 states and 8205 transitions. [2019-09-03 20:27:00,068 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-03 20:27:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5512 states and 8205 transitions. [2019-09-03 20:27:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-09-03 20:27:00,073 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:27:00,073 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:27:00,073 INFO L418 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:27:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:27:00,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1142657492, now seen corresponding path program 45 times [2019-09-03 20:27:00,074 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:27:00,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:27:00,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:00,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:27:00,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:00,076 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:27:00,076 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:27:00,077 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:27:00,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:27:07,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 20:27:07,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:27:07,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-03 20:27:07,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:27:08,157 WARN L838 $PredicateComparison]: unable to prove that (and (= c_main_~y~0 (+ (* 2 c_main_~x~0) c_main_~a~0)) (exists ((main_~k~0 Int)) (and (= c_main_~s~0 (+ (- (* main_~k~0 c_main_~r~0)) 0)) (= (+ (- (* c_main_~p~0 main_~k~0)) 1) c_main_~q~0) (= (mod main_~k~0 (- 2)) 0) (= c_main_~x~0 (* c_main_~a~0 main_~k~0)))) (= c_main_~r~0 1) (<= 1 c_main_~x~0) (= 0 (+ c_main_~p~0 2))) is different from false [2019-09-03 20:27:08,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:27:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 246 proven. 142 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2019-09-03 20:27:08,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:27:08,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-03 20:27:08,299 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:27:08,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:27:08,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=331, Unknown=2, NotChecked=36, Total=420 [2019-09-03 20:27:08,299 INFO L87 Difference]: Start difference. First operand 5512 states and 8205 transitions. Second operand 21 states. [2019-09-03 20:27:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:27:14,153 INFO L93 Difference]: Finished difference Result 6089 states and 9069 transitions. [2019-09-03 20:27:14,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:27:14,154 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 208 [2019-09-03 20:27:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:27:14,162 INFO L225 Difference]: With dead ends: 6089 [2019-09-03 20:27:14,162 INFO L226 Difference]: Without dead ends: 6086 [2019-09-03 20:27:14,163 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=713, Unknown=2, NotChecked=54, Total=870 [2019-09-03 20:27:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2019-09-03 20:27:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5524. [2019-09-03 20:27:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5524 states. [2019-09-03 20:27:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 8211 transitions. [2019-09-03 20:27:17,318 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 8211 transitions. Word has length 208 [2019-09-03 20:27:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:27:17,318 INFO L475 AbstractCegarLoop]: Abstraction has 5524 states and 8211 transitions. [2019-09-03 20:27:17,318 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:27:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 8211 transitions. [2019-09-03 20:27:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-09-03 20:27:17,323 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:27:17,323 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:27:17,324 INFO L418 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:27:17,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:27:17,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1521023468, now seen corresponding path program 46 times [2019-09-03 20:27:17,324 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:27:17,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:27:17,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:17,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:27:17,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:17,328 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:27:17,328 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:27:17,328 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:27:17,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:27:17,389 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:27:17,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:27:17,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-03 20:27:17,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:27:18,153 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-09-03 20:27:18,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:27:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 127 proven. 319 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2019-09-03 20:27:18,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:27:18,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 20:27:18,528 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:27:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:27:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:27:18,529 INFO L87 Difference]: Start difference. First operand 5524 states and 8211 transitions. Second operand 24 states. [2019-09-03 20:27:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:27:23,639 INFO L93 Difference]: Finished difference Result 6197 states and 9242 transitions. [2019-09-03 20:27:23,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:27:23,639 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 208 [2019-09-03 20:27:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:27:23,649 INFO L225 Difference]: With dead ends: 6197 [2019-09-03 20:27:23,649 INFO L226 Difference]: Without dead ends: 6194 [2019-09-03 20:27:23,651 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 20:27:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2019-09-03 20:27:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 5940. [2019-09-03 20:27:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5940 states. [2019-09-03 20:27:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 8925 transitions. [2019-09-03 20:27:27,304 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 8925 transitions. Word has length 208 [2019-09-03 20:27:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:27:27,304 INFO L475 AbstractCegarLoop]: Abstraction has 5940 states and 8925 transitions. [2019-09-03 20:27:27,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:27:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 8925 transitions. [2019-09-03 20:27:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-03 20:27:27,309 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:27:27,309 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:27:27,309 INFO L418 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:27:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:27:27,310 INFO L82 PathProgramCache]: Analyzing trace with hash 834732850, now seen corresponding path program 47 times [2019-09-03 20:27:27,310 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:27:27,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:27:27,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:27,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:27:27,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:27,313 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:27:27,313 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:27:27,313 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:27:27,373 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:27:27,680 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-03 20:27:27,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:27:27,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 112 conjunts are in the unsatisfiable core [2019-09-03 20:27:27,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:27:28,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:27:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2259 backedges. 87 proven. 281 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2019-09-03 20:27:28,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:27:28,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-03 20:27:28,431 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 20:27:28,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 20:27:28,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:27:28,431 INFO L87 Difference]: Start difference. First operand 5940 states and 8925 transitions. Second operand 25 states. [2019-09-03 20:27:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:27:34,867 INFO L93 Difference]: Finished difference Result 6273 states and 9437 transitions. [2019-09-03 20:27:34,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:27:34,868 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 209 [2019-09-03 20:27:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:27:34,878 INFO L225 Difference]: With dead ends: 6273 [2019-09-03 20:27:34,878 INFO L226 Difference]: Without dead ends: 6270 [2019-09-03 20:27:34,880 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 20:27:34,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6270 states. [2019-09-03 20:27:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6270 to 5949. [2019-09-03 20:27:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5949 states. [2019-09-03 20:27:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 8933 transitions. [2019-09-03 20:27:38,521 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 8933 transitions. Word has length 209 [2019-09-03 20:27:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:27:38,522 INFO L475 AbstractCegarLoop]: Abstraction has 5949 states and 8933 transitions. [2019-09-03 20:27:38,522 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 20:27:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 8933 transitions. [2019-09-03 20:27:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-03 20:27:38,529 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:27:38,529 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:27:38,529 INFO L418 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:27:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:27:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash -602100561, now seen corresponding path program 48 times [2019-09-03 20:27:38,530 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:27:38,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:27:38,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:38,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:27:38,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:38,533 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:27:38,533 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:27:38,533 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:27:38,543 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:27:41,883 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-03 20:27:41,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:27:41,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-03 20:27:41,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:27:42,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:27:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2264 backedges. 215 proven. 212 refuted. 0 times theorem prover too weak. 1837 trivial. 0 not checked. [2019-09-03 20:27:42,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:27:42,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-03 20:27:42,601 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:27:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:27:42,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:27:42,601 INFO L87 Difference]: Start difference. First operand 5949 states and 8933 transitions. Second operand 23 states. [2019-09-03 20:27:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:27:48,446 INFO L93 Difference]: Finished difference Result 6651 states and 9977 transitions. [2019-09-03 20:27:48,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:27:48,446 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 211 [2019-09-03 20:27:48,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:27:48,457 INFO L225 Difference]: With dead ends: 6651 [2019-09-03 20:27:48,457 INFO L226 Difference]: Without dead ends: 6648 [2019-09-03 20:27:48,459 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2019-09-03 20:27:48,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6648 states. [2019-09-03 20:27:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6648 to 6056. [2019-09-03 20:27:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6056 states. [2019-09-03 20:27:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6056 states to 6056 states and 9038 transitions. [2019-09-03 20:27:52,189 INFO L78 Accepts]: Start accepts. Automaton has 6056 states and 9038 transitions. Word has length 211 [2019-09-03 20:27:52,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:27:52,190 INFO L475 AbstractCegarLoop]: Abstraction has 6056 states and 9038 transitions. [2019-09-03 20:27:52,190 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:27:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 6056 states and 9038 transitions. [2019-09-03 20:27:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-03 20:27:52,195 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:27:52,195 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:27:52,195 INFO L418 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:27:52,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:27:52,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2075628237, now seen corresponding path program 49 times [2019-09-03 20:27:52,196 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:27:52,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:27:52,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:52,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:27:52,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:52,199 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:27:52,199 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:27:52,200 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:27:52,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:27:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:27:52,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-03 20:27:52,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:27:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2264 backedges. 62 proven. 398 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2019-09-03 20:27:53,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:27:53,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-03 20:27:53,133 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 20:27:53,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 20:27:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:27:53,133 INFO L87 Difference]: Start difference. First operand 6056 states and 9038 transitions. Second operand 27 states. [2019-09-03 20:27:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:27:59,791 INFO L93 Difference]: Finished difference Result 6389 states and 9554 transitions. [2019-09-03 20:27:59,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-03 20:27:59,792 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 211 [2019-09-03 20:27:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:27:59,802 INFO L225 Difference]: With dead ends: 6389 [2019-09-03 20:27:59,802 INFO L226 Difference]: Without dead ends: 6386 [2019-09-03 20:27:59,804 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 20:27:59,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2019-09-03 20:28:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 6060. [2019-09-03 20:28:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6060 states. [2019-09-03 20:28:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 9041 transitions. [2019-09-03 20:28:03,491 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 9041 transitions. Word has length 211 [2019-09-03 20:28:03,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:28:03,491 INFO L475 AbstractCegarLoop]: Abstraction has 6060 states and 9041 transitions. [2019-09-03 20:28:03,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 20:28:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 9041 transitions. [2019-09-03 20:28:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-09-03 20:28:03,496 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:28:03,496 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:28:03,496 INFO L418 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:28:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:28:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash 344481978, now seen corresponding path program 50 times [2019-09-03 20:28:03,497 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:28:03,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:28:03,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:28:03,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:28:03,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:28:03,500 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:28:03,500 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:28:03,500 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:28:03,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:28:03,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:28:03,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:28:03,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-03 20:28:03,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:28:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 64 proven. 231 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2019-09-03 20:28:04,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:28:04,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 20:28:04,452 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:28:04,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:28:04,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:28:04,453 INFO L87 Difference]: Start difference. First operand 6060 states and 9041 transitions. Second operand 24 states. [2019-09-03 20:28:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:28:11,056 INFO L93 Difference]: Finished difference Result 6426 states and 9589 transitions. [2019-09-03 20:28:11,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:28:11,057 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 214 [2019-09-03 20:28:11,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:28:11,067 INFO L225 Difference]: With dead ends: 6426 [2019-09-03 20:28:11,068 INFO L226 Difference]: Without dead ends: 6423 [2019-09-03 20:28:11,069 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2019-09-03 20:28:11,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6423 states. [2019-09-03 20:28:14,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6423 to 6064. [2019-09-03 20:28:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6064 states. [2019-09-03 20:28:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6064 states to 6064 states and 9040 transitions. [2019-09-03 20:28:14,782 INFO L78 Accepts]: Start accepts. Automaton has 6064 states and 9040 transitions. Word has length 214 [2019-09-03 20:28:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:28:14,782 INFO L475 AbstractCegarLoop]: Abstraction has 6064 states and 9040 transitions. [2019-09-03 20:28:14,782 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:28:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 6064 states and 9040 transitions. [2019-09-03 20:28:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-09-03 20:28:14,788 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:28:14,788 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:28:14,788 INFO L418 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:28:14,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:28:14,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1646814513, now seen corresponding path program 51 times [2019-09-03 20:28:14,788 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:28:14,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:28:14,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:28:14,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:28:14,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:28:14,792 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:28:14,792 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:28:14,792 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:28:14,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:28:14,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 20:28:14,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:28:14,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-03 20:28:14,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:28:17,066 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 35 [2019-09-03 20:28:17,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:28:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2817 backedges. 298 proven. 137 refuted. 0 times theorem prover too weak. 2382 trivial. 0 not checked. [2019-09-03 20:28:17,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:28:17,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:28:17,387 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:28:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:28:17,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=173, Unknown=2, NotChecked=0, Total=210 [2019-09-03 20:28:17,387 INFO L87 Difference]: Start difference. First operand 6064 states and 9040 transitions. Second operand 15 states. [2019-09-03 20:28:20,840 WARN L188 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 38 [2019-09-03 20:28:23,363 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 37 [2019-09-03 20:28:27,710 WARN L188 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 50 [2019-09-03 20:28:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:28:29,926 INFO L93 Difference]: Finished difference Result 6098 states and 9068 transitions. [2019-09-03 20:28:29,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:28:29,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 220 [2019-09-03 20:28:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:28:29,937 INFO L225 Difference]: With dead ends: 6098 [2019-09-03 20:28:29,937 INFO L226 Difference]: Without dead ends: 6095 [2019-09-03 20:28:29,938 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=128, Invalid=568, Unknown=6, NotChecked=0, Total=702 [2019-09-03 20:28:29,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2019-09-03 20:28:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 6092. [2019-09-03 20:28:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6092 states. [2019-09-03 20:28:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6092 states to 6092 states and 9060 transitions. [2019-09-03 20:28:33,683 INFO L78 Accepts]: Start accepts. Automaton has 6092 states and 9060 transitions. Word has length 220 [2019-09-03 20:28:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:28:33,684 INFO L475 AbstractCegarLoop]: Abstraction has 6092 states and 9060 transitions. [2019-09-03 20:28:33,684 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:28:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 6092 states and 9060 transitions. [2019-09-03 20:28:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-09-03 20:28:33,689 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:28:33,689 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:28:33,689 INFO L418 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:28:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:28:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1159228363, now seen corresponding path program 52 times [2019-09-03 20:28:33,690 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:28:33,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:28:33,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:28:33,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:28:33,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:28:33,693 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:28:33,693 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:28:33,693 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:28:33,707 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:28:33,761 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:28:33,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:28:33,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 126 conjunts are in the unsatisfiable core [2019-09-03 20:28:33,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:28:34,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:28:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2287 backedges. 114 proven. 367 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2019-09-03 20:28:34,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:28:34,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-03 20:28:34,901 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 20:28:34,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 20:28:34,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:28:34,902 INFO L87 Difference]: Start difference. First operand 6092 states and 9060 transitions. Second operand 27 states. [2019-09-03 20:28:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:28:41,109 INFO L93 Difference]: Finished difference Result 6976 states and 10417 transitions. [2019-09-03 20:28:41,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 20:28:41,109 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 216 [2019-09-03 20:28:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:28:41,122 INFO L225 Difference]: With dead ends: 6976 [2019-09-03 20:28:41,122 INFO L226 Difference]: Without dead ends: 6973 [2019-09-03 20:28:41,125 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2019-09-03 20:28:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6973 states. [2019-09-03 20:28:45,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6973 to 6425. [2019-09-03 20:28:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6425 states. [2019-09-03 20:28:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6425 states to 6425 states and 9592 transitions. [2019-09-03 20:28:45,348 INFO L78 Accepts]: Start accepts. Automaton has 6425 states and 9592 transitions. Word has length 216 [2019-09-03 20:28:45,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:28:45,348 INFO L475 AbstractCegarLoop]: Abstraction has 6425 states and 9592 transitions. [2019-09-03 20:28:45,348 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 20:28:45,348 INFO L276 IsEmpty]: Start isEmpty. Operand 6425 states and 9592 transitions. [2019-09-03 20:28:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-03 20:28:45,353 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:28:45,354 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:28:45,354 INFO L418 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:28:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:28:45,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1960917980, now seen corresponding path program 53 times [2019-09-03 20:28:45,354 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:28:45,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:28:45,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:28:45,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:28:45,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:28:45,357 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:28:45,357 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:28:45,357 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:28:45,366 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:28:51,072 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-03 20:28:51,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:28:51,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 133 conjunts are in the unsatisfiable core [2019-09-03 20:28:51,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:28:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 98 proven. 402 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:28:52,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:28:52,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-03 20:28:52,156 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 20:28:52,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 20:28:52,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:28:52,156 INFO L87 Difference]: Start difference. First operand 6425 states and 9592 transitions. Second operand 30 states. [2019-09-03 20:28:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:28:59,448 INFO L93 Difference]: Finished difference Result 6826 states and 10204 transitions. [2019-09-03 20:28:59,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-03 20:28:59,449 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 219 [2019-09-03 20:28:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:28:59,461 INFO L225 Difference]: With dead ends: 6826 [2019-09-03 20:28:59,461 INFO L226 Difference]: Without dead ends: 6823 [2019-09-03 20:28:59,463 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=137, Invalid=1669, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 20:28:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6823 states. [2019-09-03 20:29:03,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6823 to 6429. [2019-09-03 20:29:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6429 states. [2019-09-03 20:29:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6429 states to 6429 states and 9591 transitions. [2019-09-03 20:29:03,700 INFO L78 Accepts]: Start accepts. Automaton has 6429 states and 9591 transitions. Word has length 219 [2019-09-03 20:29:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:29:03,700 INFO L475 AbstractCegarLoop]: Abstraction has 6429 states and 9591 transitions. [2019-09-03 20:29:03,700 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 20:29:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6429 states and 9591 transitions. [2019-09-03 20:29:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-09-03 20:29:03,706 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:29:03,706 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:29:03,706 INFO L418 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:29:03,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:29:03,707 INFO L82 PathProgramCache]: Analyzing trace with hash 8196379, now seen corresponding path program 54 times [2019-09-03 20:29:03,707 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:29:03,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:29:03,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:03,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:29:03,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:03,710 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:29:03,710 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:29:03,710 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:29:03,719 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:29:03,769 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 20:29:03,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:29:03,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 88 conjunts are in the unsatisfiable core [2019-09-03 20:29:03,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:29:03,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:29:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2828 backedges. 243 proven. 301 refuted. 0 times theorem prover too weak. 2284 trivial. 0 not checked. [2019-09-03 20:29:04,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:29:04,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:29:04,108 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:29:04,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:29:04,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:29:04,109 INFO L87 Difference]: Start difference. First operand 6429 states and 9591 transitions. Second operand 15 states. [2019-09-03 20:29:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:29:09,012 INFO L93 Difference]: Finished difference Result 6519 states and 9687 transitions. [2019-09-03 20:29:09,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:29:09,012 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 225 [2019-09-03 20:29:09,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:29:09,021 INFO L225 Difference]: With dead ends: 6519 [2019-09-03 20:29:09,022 INFO L226 Difference]: Without dead ends: 6516 [2019-09-03 20:29:09,023 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:29:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6516 states. [2019-09-03 20:29:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6516 to 5884. [2019-09-03 20:29:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5884 states. [2019-09-03 20:29:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5884 states to 5884 states and 8647 transitions. [2019-09-03 20:29:12,740 INFO L78 Accepts]: Start accepts. Automaton has 5884 states and 8647 transitions. Word has length 225 [2019-09-03 20:29:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:29:12,740 INFO L475 AbstractCegarLoop]: Abstraction has 5884 states and 8647 transitions. [2019-09-03 20:29:12,740 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:29:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 5884 states and 8647 transitions. [2019-09-03 20:29:12,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-03 20:29:12,746 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:29:12,746 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:29:12,746 INFO L418 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:29:12,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:29:12,746 INFO L82 PathProgramCache]: Analyzing trace with hash -415604442, now seen corresponding path program 55 times [2019-09-03 20:29:12,747 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:29:12,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:29:12,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:12,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:29:12,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:12,751 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:29:12,751 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:29:12,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:29:12,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:29:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:29:12,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-03 20:29:12,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:29:13,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:29:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 72 proven. 246 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2019-09-03 20:29:13,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:29:13,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-03 20:29:13,528 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 20:29:13,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 20:29:13,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:29:13,529 INFO L87 Difference]: Start difference. First operand 5884 states and 8647 transitions. Second operand 22 states. [2019-09-03 20:29:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:29:19,727 INFO L93 Difference]: Finished difference Result 6265 states and 9246 transitions. [2019-09-03 20:29:19,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:29:19,727 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 228 [2019-09-03 20:29:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:29:19,736 INFO L225 Difference]: With dead ends: 6265 [2019-09-03 20:29:19,736 INFO L226 Difference]: Without dead ends: 6262 [2019-09-03 20:29:19,737 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:29:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6262 states. [2019-09-03 20:29:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6262 to 5911. [2019-09-03 20:29:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5911 states. [2019-09-03 20:29:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5911 states to 5911 states and 8677 transitions. [2019-09-03 20:29:23,525 INFO L78 Accepts]: Start accepts. Automaton has 5911 states and 8677 transitions. Word has length 228 [2019-09-03 20:29:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:29:23,526 INFO L475 AbstractCegarLoop]: Abstraction has 5911 states and 8677 transitions. [2019-09-03 20:29:23,526 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 20:29:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 5911 states and 8677 transitions. [2019-09-03 20:29:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-03 20:29:23,531 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:29:23,532 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:29:23,532 INFO L418 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:29:23,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:29:23,532 INFO L82 PathProgramCache]: Analyzing trace with hash -902086524, now seen corresponding path program 56 times [2019-09-03 20:29:23,532 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:29:23,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:29:23,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:23,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:29:23,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:23,536 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:29:23,536 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:29:23,536 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:29:23,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:29:23,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:29:23,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:29:23,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 105 conjunts are in the unsatisfiable core [2019-09-03 20:29:23,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:29:24,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:29:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 72 proven. 246 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2019-09-03 20:29:24,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:29:24,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-03 20:29:24,549 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 20:29:24,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 20:29:24,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:29:24,550 INFO L87 Difference]: Start difference. First operand 5911 states and 8677 transitions. Second operand 22 states. [2019-09-03 20:29:30,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:29:30,804 INFO L93 Difference]: Finished difference Result 6286 states and 9265 transitions. [2019-09-03 20:29:30,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:29:30,805 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 228 [2019-09-03 20:29:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:29:30,814 INFO L225 Difference]: With dead ends: 6286 [2019-09-03 20:29:30,814 INFO L226 Difference]: Without dead ends: 6283 [2019-09-03 20:29:30,815 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:29:30,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6283 states. [2019-09-03 20:29:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6283 to 5919. [2019-09-03 20:29:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5919 states. [2019-09-03 20:29:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5919 states to 5919 states and 8683 transitions. [2019-09-03 20:29:34,632 INFO L78 Accepts]: Start accepts. Automaton has 5919 states and 8683 transitions. Word has length 228 [2019-09-03 20:29:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:29:34,633 INFO L475 AbstractCegarLoop]: Abstraction has 5919 states and 8683 transitions. [2019-09-03 20:29:34,633 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 20:29:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 5919 states and 8683 transitions. [2019-09-03 20:29:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-03 20:29:34,639 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:29:34,639 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:29:34,639 INFO L418 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:29:34,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:29:34,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1194017596, now seen corresponding path program 57 times [2019-09-03 20:29:34,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:29:34,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:29:34,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:34,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:29:34,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:34,642 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:29:34,642 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:29:34,642 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:29:34,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:29:34,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 20:29:34,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:29:34,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 96 conjunts are in the unsatisfiable core [2019-09-03 20:29:34,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:29:35,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:29:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 197 proven. 190 refuted. 0 times theorem prover too weak. 2451 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:29:35,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:29:35,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-03 20:29:35,372 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:29:35,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:29:35,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:29:35,373 INFO L87 Difference]: Start difference. First operand 5919 states and 8683 transitions. Second operand 21 states. [2019-09-03 20:29:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:29:42,059 INFO L93 Difference]: Finished difference Result 6680 states and 9846 transitions. [2019-09-03 20:29:42,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:29:42,060 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 228 [2019-09-03 20:29:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:29:42,069 INFO L225 Difference]: With dead ends: 6680 [2019-09-03 20:29:42,069 INFO L226 Difference]: Without dead ends: 6677 [2019-09-03 20:29:42,071 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 20:29:42,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6677 states. [2019-09-03 20:29:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6677 to 5909. [2019-09-03 20:29:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5909 states. [2019-09-03 20:29:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5909 states to 5909 states and 8617 transitions. [2019-09-03 20:29:45,801 INFO L78 Accepts]: Start accepts. Automaton has 5909 states and 8617 transitions. Word has length 228 [2019-09-03 20:29:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:29:45,802 INFO L475 AbstractCegarLoop]: Abstraction has 5909 states and 8617 transitions. [2019-09-03 20:29:45,802 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:29:45,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5909 states and 8617 transitions. [2019-09-03 20:29:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-03 20:29:45,807 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:29:45,807 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:29:45,808 INFO L418 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:29:45,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:29:45,808 INFO L82 PathProgramCache]: Analyzing trace with hash 798193314, now seen corresponding path program 58 times [2019-09-03 20:29:45,808 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:29:45,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:29:45,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:45,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:29:45,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:45,811 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:29:45,811 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:29:45,811 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:29:45,821 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:29:45,871 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:29:45,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:29:45,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 102 conjunts are in the unsatisfiable core [2019-09-03 20:29:45,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:29:46,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:29:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 109 proven. 413 refuted. 0 times theorem prover too weak. 2316 trivial. 0 not checked. [2019-09-03 20:29:46,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:29:46,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-03 20:29:46,517 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 20:29:46,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 20:29:46,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:29:46,517 INFO L87 Difference]: Start difference. First operand 5909 states and 8617 transitions. Second operand 25 states. [2019-09-03 20:29:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:29:53,392 INFO L93 Difference]: Finished difference Result 6503 states and 9445 transitions. [2019-09-03 20:29:53,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:29:53,392 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 228 [2019-09-03 20:29:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:29:53,402 INFO L225 Difference]: With dead ends: 6503 [2019-09-03 20:29:53,402 INFO L226 Difference]: Without dead ends: 6500 [2019-09-03 20:29:53,403 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 20:29:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6500 states. [2019-09-03 20:29:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6500 to 6172. [2019-09-03 20:29:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6172 states. [2019-09-03 20:29:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6172 states to 6172 states and 9042 transitions. [2019-09-03 20:29:57,480 INFO L78 Accepts]: Start accepts. Automaton has 6172 states and 9042 transitions. Word has length 228 [2019-09-03 20:29:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:29:57,481 INFO L475 AbstractCegarLoop]: Abstraction has 6172 states and 9042 transitions. [2019-09-03 20:29:57,481 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 20:29:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 6172 states and 9042 transitions. [2019-09-03 20:29:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-03 20:29:57,486 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:29:57,486 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:29:57,486 INFO L418 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:29:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:29:57,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1483711202, now seen corresponding path program 59 times [2019-09-03 20:29:57,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:29:57,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:29:57,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:57,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:29:57,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:29:57,490 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:29:57,490 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:29:57,490 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:29:57,499 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:29:57,651 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-03 20:29:57,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:29:57,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 112 conjunts are in the unsatisfiable core [2019-09-03 20:29:57,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:29:58,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:29:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 119 proven. 304 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2019-09-03 20:29:58,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:29:58,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-03 20:29:58,602 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 20:29:58,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 20:29:58,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:29:58,602 INFO L87 Difference]: Start difference. First operand 6172 states and 9042 transitions. Second operand 25 states. [2019-09-03 20:30:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:30:06,264 INFO L93 Difference]: Finished difference Result 6914 states and 10207 transitions. [2019-09-03 20:30:06,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:30:06,264 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 228 [2019-09-03 20:30:06,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:30:06,276 INFO L225 Difference]: With dead ends: 6914 [2019-09-03 20:30:06,276 INFO L226 Difference]: Without dead ends: 6911 [2019-09-03 20:30:06,278 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 20:30:06,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6911 states. [2019-09-03 20:30:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6911 to 6546. [2019-09-03 20:30:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6546 states. [2019-09-03 20:30:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6546 states to 6546 states and 9627 transitions. [2019-09-03 20:30:10,849 INFO L78 Accepts]: Start accepts. Automaton has 6546 states and 9627 transitions. Word has length 228 [2019-09-03 20:30:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:30:10,850 INFO L475 AbstractCegarLoop]: Abstraction has 6546 states and 9627 transitions. [2019-09-03 20:30:10,850 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 20:30:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 6546 states and 9627 transitions. [2019-09-03 20:30:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-09-03 20:30:10,856 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:30:10,856 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:30:10,856 INFO L418 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:30:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:30:10,856 INFO L82 PathProgramCache]: Analyzing trace with hash 142704433, now seen corresponding path program 60 times [2019-09-03 20:30:10,856 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:30:10,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:30:10,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:30:10,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:30:10,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:30:10,860 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:30:10,860 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:30:10,860 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:30:10,872 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:30:10,945 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-03 20:30:10,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:30:10,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-03 20:30:10,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:30:14,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:30:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 317 proven. 152 refuted. 0 times theorem prover too weak. 2382 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Exception during sending of exit command (exit): Stream closed [2019-09-03 20:30:14,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:30:14,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-03 20:30:14,283 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:30:14,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:30:14,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=297, Unknown=1, NotChecked=0, Total=342 [2019-09-03 20:30:14,284 INFO L87 Difference]: Start difference. First operand 6546 states and 9627 transitions. Second operand 19 states. [2019-09-03 20:30:34,037 WARN L188 SmtUtils]: Spent 2.22 s on a formula simplification that was a NOOP. DAG size: 40 [2019-09-03 20:30:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:30:37,161 INFO L93 Difference]: Finished difference Result 7299 states and 10779 transitions. [2019-09-03 20:30:37,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:30:37,161 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 231 [2019-09-03 20:30:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:30:37,172 INFO L225 Difference]: With dead ends: 7299 [2019-09-03 20:30:37,173 INFO L226 Difference]: Without dead ends: 7296 [2019-09-03 20:30:37,174 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=92, Invalid=663, Unknown=1, NotChecked=0, Total=756 [2019-09-03 20:30:37,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7296 states. [2019-09-03 20:30:41,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7296 to 6591. [2019-09-03 20:30:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6591 states. [2019-09-03 20:30:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6591 states to 6591 states and 9664 transitions. [2019-09-03 20:30:41,718 INFO L78 Accepts]: Start accepts. Automaton has 6591 states and 9664 transitions. Word has length 231 [2019-09-03 20:30:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:30:41,718 INFO L475 AbstractCegarLoop]: Abstraction has 6591 states and 9664 transitions. [2019-09-03 20:30:41,718 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:30:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6591 states and 9664 transitions. [2019-09-03 20:30:41,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-09-03 20:30:41,724 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:30:41,724 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:30:41,724 INFO L418 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:30:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:30:41,725 INFO L82 PathProgramCache]: Analyzing trace with hash -334165991, now seen corresponding path program 61 times [2019-09-03 20:30:41,725 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:30:41,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:30:41,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:30:41,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:30:41,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:30:41,728 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:30:41,728 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:30:41,728 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:30:41,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:30:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:30:41,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-03 20:30:41,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:30:42,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:30:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 72 proven. 259 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2019-09-03 20:30:42,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:30:42,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-03 20:30:42,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:30:42,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:30:42,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:30:42,614 INFO L87 Difference]: Start difference. First operand 6591 states and 9664 transitions. Second operand 23 states. [2019-09-03 20:30:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:30:50,171 INFO L93 Difference]: Finished difference Result 7339 states and 10839 transitions. [2019-09-03 20:30:50,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:30:50,172 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 231 [2019-09-03 20:30:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:30:50,185 INFO L225 Difference]: With dead ends: 7339 [2019-09-03 20:30:50,185 INFO L226 Difference]: Without dead ends: 7336 [2019-09-03 20:30:50,186 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 20:30:50,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2019-09-03 20:30:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 6973. [2019-09-03 20:30:55,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6973 states. [2019-09-03 20:30:55,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6973 states to 6973 states and 10261 transitions. [2019-09-03 20:30:55,096 INFO L78 Accepts]: Start accepts. Automaton has 6973 states and 10261 transitions. Word has length 231 [2019-09-03 20:30:55,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:30:55,096 INFO L475 AbstractCegarLoop]: Abstraction has 6973 states and 10261 transitions. [2019-09-03 20:30:55,096 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:30:55,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6973 states and 10261 transitions. [2019-09-03 20:30:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-09-03 20:30:55,102 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:30:55,102 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:30:55,103 INFO L418 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:30:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:30:55,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1711791789, now seen corresponding path program 62 times [2019-09-03 20:30:55,103 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:30:55,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:30:55,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:30:55,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:30:55,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:30:55,106 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:30:55,106 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:30:55,106 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:30:55,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:30:55,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:30:55,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:30:55,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 109 conjunts are in the unsatisfiable core [2019-09-03 20:30:55,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:30:55,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:30:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 72 proven. 259 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2019-09-03 20:30:55,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:30:55,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-03 20:30:55,963 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:30:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:30:55,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:30:55,963 INFO L87 Difference]: Start difference. First operand 6973 states and 10261 transitions. Second operand 23 states. [2019-09-03 20:31:03,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:31:03,539 INFO L93 Difference]: Finished difference Result 7355 states and 10856 transitions. [2019-09-03 20:31:03,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:31:03,539 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 231 [2019-09-03 20:31:03,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:31:03,552 INFO L225 Difference]: With dead ends: 7355 [2019-09-03 20:31:03,552 INFO L226 Difference]: Without dead ends: 7352 [2019-09-03 20:31:03,554 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 20:31:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7352 states. [2019-09-03 20:31:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7352 to 6979. [2019-09-03 20:31:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6979 states. [2019-09-03 20:31:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6979 states to 6979 states and 10270 transitions. [2019-09-03 20:31:08,482 INFO L78 Accepts]: Start accepts. Automaton has 6979 states and 10270 transitions. Word has length 231 [2019-09-03 20:31:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:31:08,482 INFO L475 AbstractCegarLoop]: Abstraction has 6979 states and 10270 transitions. [2019-09-03 20:31:08,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:31:08,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6979 states and 10270 transitions. [2019-09-03 20:31:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-03 20:31:08,489 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:31:08,489 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:31:08,489 INFO L418 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:31:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:31:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash 776045328, now seen corresponding path program 63 times [2019-09-03 20:31:08,489 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:31:08,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:31:08,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:31:08,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:31:08,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:31:08,492 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:31:08,492 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:31:08,492 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:31:08,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:31:09,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 20:31:09,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:31:09,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 122 conjunts are in the unsatisfiable core [2019-09-03 20:31:09,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:31:11,949 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 37 [2019-09-03 20:31:13,235 WARN L188 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 35 [2019-09-03 20:31:13,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:31:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2856 backedges. 334 proven. 243 refuted. 0 times theorem prover too weak. 2279 trivial. 0 not checked. [2019-09-03 20:31:13,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:31:13,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-03 20:31:13,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:31:13,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:31:13,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:31:13,555 INFO L87 Difference]: Start difference. First operand 6979 states and 10270 transitions. Second operand 23 states. [2019-09-03 20:31:19,461 WARN L188 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-09-03 20:31:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:31:23,274 INFO L93 Difference]: Finished difference Result 7700 states and 11406 transitions. [2019-09-03 20:31:23,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:31:23,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 233 [2019-09-03 20:31:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:31:23,287 INFO L225 Difference]: With dead ends: 7700 [2019-09-03 20:31:23,287 INFO L226 Difference]: Without dead ends: 7697 [2019-09-03 20:31:23,289 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 20:31:23,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7697 states. [2019-09-03 20:31:28,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7697 to 7054. [2019-09-03 20:31:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7054 states. [2019-09-03 20:31:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 10356 transitions. [2019-09-03 20:31:28,332 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 10356 transitions. Word has length 233 [2019-09-03 20:31:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:31:28,332 INFO L475 AbstractCegarLoop]: Abstraction has 7054 states and 10356 transitions. [2019-09-03 20:31:28,332 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:31:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 10356 transitions. [2019-09-03 20:31:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-03 20:31:28,338 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:31:28,339 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:31:28,339 INFO L418 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:31:28,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:31:28,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2367826, now seen corresponding path program 64 times [2019-09-03 20:31:28,339 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:31:28,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:31:28,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:31:28,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:31:28,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:31:28,342 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:31:28,342 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:31:28,342 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:31:28,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:31:28,408 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:31:28,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:31:28,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 112 conjunts are in the unsatisfiable core [2019-09-03 20:31:28,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:31:28,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:31:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2856 backedges. 117 proven. 421 refuted. 0 times theorem prover too weak. 2318 trivial. 0 not checked. [2019-09-03 20:31:29,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:31:29,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-03 20:31:29,059 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-03 20:31:29,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-03 20:31:29,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:31:29,059 INFO L87 Difference]: Start difference. First operand 7054 states and 10356 transitions. Second operand 26 states. [2019-09-03 20:31:29,624 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2019-09-03 20:31:30,115 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2019-09-03 20:31:30,783 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2019-09-03 20:31:31,741 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-09-03 20:31:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:31:37,333 INFO L93 Difference]: Finished difference Result 7592 states and 11023 transitions. [2019-09-03 20:31:37,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:31:37,334 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 233 [2019-09-03 20:31:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:31:37,345 INFO L225 Difference]: With dead ends: 7592 [2019-09-03 20:31:37,346 INFO L226 Difference]: Without dead ends: 7589 [2019-09-03 20:31:37,347 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 20:31:37,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7589 states. [2019-09-03 20:31:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7589 to 7183. [2019-09-03 20:31:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7183 states. [2019-09-03 20:31:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7183 states to 7183 states and 10530 transitions. [2019-09-03 20:31:42,669 INFO L78 Accepts]: Start accepts. Automaton has 7183 states and 10530 transitions. Word has length 233 [2019-09-03 20:31:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:31:42,669 INFO L475 AbstractCegarLoop]: Abstraction has 7183 states and 10530 transitions. [2019-09-03 20:31:42,669 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-03 20:31:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7183 states and 10530 transitions. [2019-09-03 20:31:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-03 20:31:42,675 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:31:42,676 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:31:42,676 INFO L418 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:31:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:31:42,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1619606324, now seen corresponding path program 65 times [2019-09-03 20:31:42,676 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:31:42,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:31:42,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:31:42,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:31:42,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:31:42,679 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:31:42,679 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:31:42,679 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:31:42,697 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1