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/cohencu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:08,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:08,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:08,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:08,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:08,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:08,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:08,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:08,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:08,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:08,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:08,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:08,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:08,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:08,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:08,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:08,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:08,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:08,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:08,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:08,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:08,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:08,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:08,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:08,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:17:08,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:17:08,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:17:08,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:17:08,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:17:08,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:17:08,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:08,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:08,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:08,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:08,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:08,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:08,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:08,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:08,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:08,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:08,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:08,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:17:08,530 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:08,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:08,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:08,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:08,535 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:08,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:08,535 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:08,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:08,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:08,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:08,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:08,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:08,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:08,537 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:08,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:08,539 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:08,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:08,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:08,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:08,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:08,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:08,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:08,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:08,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:08,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:08,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:08,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:08,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:08,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:08,820 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:08,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:08,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:08,840 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:08,840 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:08,841 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu.c [2019-10-14 23:17:08,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307ec88e2/a017df1c713a4ad2bd0f82ac205c6aa6/FLAGdabc97d3b [2019-10-14 23:17:09,386 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:09,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu.c [2019-10-14 23:17:09,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307ec88e2/a017df1c713a4ad2bd0f82ac205c6aa6/FLAGdabc97d3b [2019-10-14 23:17:09,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307ec88e2/a017df1c713a4ad2bd0f82ac205c6aa6 [2019-10-14 23:17:09,784 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:09,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:09,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:09,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:09,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:09,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:09" (1/1) ... [2019-10-14 23:17:09,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee337c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:09, skipping insertion in model container [2019-10-14 23:17:09,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:09" (1/1) ... [2019-10-14 23:17:09,801 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:09,819 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:10,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:10,009 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:10,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:10,062 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:10,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:10 WrapperNode [2019-10-14 23:17:10,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:10,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:10,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:10,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:10,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:10" (1/1) ... [2019-10-14 23:17:10,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:10" (1/1) ... [2019-10-14 23:17:10,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:10" (1/1) ... [2019-10-14 23:17:10,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:10" (1/1) ... [2019-10-14 23:17:10,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:10" (1/1) ... [2019-10-14 23:17:10,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:10" (1/1) ... [2019-10-14 23:17:10,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:10" (1/1) ... [2019-10-14 23:17:10,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:10,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:10,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:10,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:10,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:10,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:10,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:10,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:10,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:10,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:10,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:10,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:10,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:10,459 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:10,460 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:17:10,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:10 BoogieIcfgContainer [2019-10-14 23:17:10,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:10,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:10,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:10,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:10,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:09" (1/3) ... [2019-10-14 23:17:10,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1e9a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:10, skipping insertion in model container [2019-10-14 23:17:10,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:10" (2/3) ... [2019-10-14 23:17:10,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1e9a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:10, skipping insertion in model container [2019-10-14 23:17:10,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:10" (3/3) ... [2019-10-14 23:17:10,478 INFO L109 eAbstractionObserver]: Analyzing ICFG cohencu.c [2019-10-14 23:17:10,488 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:10,496 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:10,520 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:10,544 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:10,544 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:10,544 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:10,544 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:10,544 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:10,545 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:10,545 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:10,545 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-14 23:17:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:10,568 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:10,568 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:10,570 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:10,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2145967090, now seen corresponding path program 1 times [2019-10-14 23:17:10,580 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:10,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887079379] [2019-10-14 23:17:10,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:10,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:10,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:10,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887079379] [2019-10-14 23:17:10,677 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:10,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:10,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143207614] [2019-10-14 23:17:10,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:10,682 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:10,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:10,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:10,695 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-10-14 23:17:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:10,722 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2019-10-14 23:17:10,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:10,723 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:10,733 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:17:10,733 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:17:10,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:17:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 23:17:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:17:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2019-10-14 23:17:10,778 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2019-10-14 23:17:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:10,779 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2019-10-14 23:17:10,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2019-10-14 23:17:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:10,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:10,780 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:10,780 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:10,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:10,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2134586928, now seen corresponding path program 1 times [2019-10-14 23:17:10,781 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:10,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259915412] [2019-10-14 23:17:10,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:10,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:10,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:10,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259915412] [2019-10-14 23:17:10,923 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:10,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:10,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497565670] [2019-10-14 23:17:10,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:10,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:10,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:10,927 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 5 states. [2019-10-14 23:17:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:11,056 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2019-10-14 23:17:11,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:11,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:11,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:11,058 INFO L225 Difference]: With dead ends: 30 [2019-10-14 23:17:11,058 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:17:11,059 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:17:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 23:17:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:17:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-10-14 23:17:11,079 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2019-10-14 23:17:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:11,080 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-10-14 23:17:11,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-10-14 23:17:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:17:11,083 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:11,083 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:11,084 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:11,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1496147284, now seen corresponding path program 1 times [2019-10-14 23:17:11,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:11,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789809280] [2019-10-14 23:17:11,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:11,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:11,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:11,105 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:11,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550040639] [2019-10-14 23:17:11,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:11,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:17:11,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:11,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789809280] [2019-10-14 23:17:11,261 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:11,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550040639] [2019-10-14 23:17:11,261 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:11,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:11,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201622516] [2019-10-14 23:17:11,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:11,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:11,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:11,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:11,265 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2019-10-14 23:17:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:11,674 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2019-10-14 23:17:11,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:11,675 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-14 23:17:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:11,677 INFO L225 Difference]: With dead ends: 51 [2019-10-14 23:17:11,677 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 23:17:11,678 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 23:17:11,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-10-14 23:17:11,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 23:17:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2019-10-14 23:17:11,702 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 15 [2019-10-14 23:17:11,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:11,703 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2019-10-14 23:17:11,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:11,703 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2019-10-14 23:17:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:17:11,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:11,704 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:11,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:11,907 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:11,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1472996464, now seen corresponding path program 1 times [2019-10-14 23:17:11,908 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:11,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658371518] [2019-10-14 23:17:11,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:11,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:11,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:11,917 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:11,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764528414] [2019-10-14 23:17:11,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:11,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:17:11,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:12,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658371518] [2019-10-14 23:17:12,015 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:12,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764528414] [2019-10-14 23:17:12,015 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:12,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:12,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087874320] [2019-10-14 23:17:12,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:12,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:12,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:12,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:12,018 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand 8 states. [2019-10-14 23:17:12,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:12,296 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-10-14 23:17:12,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:12,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-10-14 23:17:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:12,299 INFO L225 Difference]: With dead ends: 55 [2019-10-14 23:17:12,300 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:17:12,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:12,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:17:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-10-14 23:17:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 23:17:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2019-10-14 23:17:12,317 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 20 [2019-10-14 23:17:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:12,318 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2019-10-14 23:17:12,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2019-10-14 23:17:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 23:17:12,319 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:12,319 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:12,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:12,523 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:12,523 INFO L82 PathProgramCache]: Analyzing trace with hash -378433900, now seen corresponding path program 1 times [2019-10-14 23:17:12,524 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:12,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546109575] [2019-10-14 23:17:12,524 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,524 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:12,531 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:12,531 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452906502] [2019-10-14 23:17:12,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:17:12,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:17:12,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546109575] [2019-10-14 23:17:12,620 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:12,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452906502] [2019-10-14 23:17:12,621 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:12,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:12,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781390439] [2019-10-14 23:17:12,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:12,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:12,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:12,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:12,623 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2019-10-14 23:17:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:15,082 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2019-10-14 23:17:15,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:15,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-10-14 23:17:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:15,085 INFO L225 Difference]: With dead ends: 59 [2019-10-14 23:17:15,085 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:17:15,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:17:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-14 23:17:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:17:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-10-14 23:17:15,098 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2019-10-14 23:17:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:15,098 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-10-14 23:17:15,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-10-14 23:17:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:17:15,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:15,100 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:15,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:15,304 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:15,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1836902192, now seen corresponding path program 1 times [2019-10-14 23:17:15,305 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:15,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716788416] [2019-10-14 23:17:15,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:15,315 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:15,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205041833] [2019-10-14 23:17:15,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:15,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:17:15,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 23:17:15,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716788416] [2019-10-14 23:17:15,441 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:15,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205041833] [2019-10-14 23:17:15,442 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:15,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:15,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156754037] [2019-10-14 23:17:15,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:15,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:15,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:15,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:15,444 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2019-10-14 23:17:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:15,830 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2019-10-14 23:17:15,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:15,831 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-14 23:17:15,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:15,832 INFO L225 Difference]: With dead ends: 70 [2019-10-14 23:17:15,833 INFO L226 Difference]: Without dead ends: 68 [2019-10-14 23:17:15,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-14 23:17:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-10-14 23:17:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 23:17:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2019-10-14 23:17:15,848 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 42 [2019-10-14 23:17:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:15,848 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2019-10-14 23:17:15,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2019-10-14 23:17:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:17:15,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:15,850 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:16,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,051 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:16,052 INFO L82 PathProgramCache]: Analyzing trace with hash -223920524, now seen corresponding path program 2 times [2019-10-14 23:17:16,052 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:16,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165531888] [2019-10-14 23:17:16,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:16,064 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:16,064 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377437749] [2019-10-14 23:17:16,064 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:16,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:16,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 23:17:16,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 23:17:16,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165531888] [2019-10-14 23:17:16,183 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:16,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377437749] [2019-10-14 23:17:16,183 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:16,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:16,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351447815] [2019-10-14 23:17:16,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:16,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:16,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:16,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:16,186 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 9 states. [2019-10-14 23:17:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:16,548 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2019-10-14 23:17:16,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:16,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-10-14 23:17:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:16,550 INFO L225 Difference]: With dead ends: 78 [2019-10-14 23:17:16,550 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 23:17:16,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:16,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 23:17:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-10-14 23:17:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 23:17:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2019-10-14 23:17:16,564 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 47 [2019-10-14 23:17:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:16,565 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2019-10-14 23:17:16,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2019-10-14 23:17:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 23:17:16,566 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:16,566 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:16,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,770 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:16,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1224693684, now seen corresponding path program 3 times [2019-10-14 23:17:16,772 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:16,772 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781099010] [2019-10-14 23:17:16,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:16,779 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:16,779 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816109916] [2019-10-14 23:17:16,780 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:17:16,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:16,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:17:16,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 23:17:16,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781099010] [2019-10-14 23:17:16,893 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:16,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816109916] [2019-10-14 23:17:16,893 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:16,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:17:16,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673952718] [2019-10-14 23:17:16,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:16,896 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:16,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:16,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:16,897 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 6 states. [2019-10-14 23:17:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:17,007 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2019-10-14 23:17:17,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:17,007 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2019-10-14 23:17:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:17,010 INFO L225 Difference]: With dead ends: 81 [2019-10-14 23:17:17,010 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 23:17:17,011 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 23:17:17,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-10-14 23:17:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 23:17:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2019-10-14 23:17:17,035 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 57 [2019-10-14 23:17:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:17,036 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2019-10-14 23:17:17,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2019-10-14 23:17:17,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 23:17:17,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:17,039 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:17,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:17,244 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:17,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:17,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1975458643, now seen corresponding path program 1 times [2019-10-14 23:17:17,245 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:17,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264829750] [2019-10-14 23:17:17,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,246 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:17,254 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:17,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020743196] [2019-10-14 23:17:17,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:17,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 23:17:17,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:17,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:17:17,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264829750] [2019-10-14 23:17:17,455 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:17,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020743196] [2019-10-14 23:17:17,456 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:17,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:17,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622908927] [2019-10-14 23:17:17,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:17,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:17,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:17,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:17,460 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 9 states. [2019-10-14 23:17:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:17,797 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2019-10-14 23:17:17,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:17,797 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2019-10-14 23:17:17,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:17,799 INFO L225 Difference]: With dead ends: 88 [2019-10-14 23:17:17,799 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 23:17:17,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:17,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 23:17:17,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-10-14 23:17:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 23:17:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2019-10-14 23:17:17,813 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 68 [2019-10-14 23:17:17,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:17,814 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2019-10-14 23:17:17,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2019-10-14 23:17:17,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 23:17:17,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:17,815 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:18,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:18,022 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:18,023 INFO L82 PathProgramCache]: Analyzing trace with hash -109766700, now seen corresponding path program 4 times [2019-10-14 23:17:18,023 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:18,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911084549] [2019-10-14 23:17:18,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:18,042 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:18,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264659614] [2019-10-14 23:17:18,042 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:18,081 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:18,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:18,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 23:17:18,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2019-10-14 23:17:18,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911084549] [2019-10-14 23:17:18,194 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:18,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264659614] [2019-10-14 23:17:18,195 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:18,195 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:18,195 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219201450] [2019-10-14 23:17:18,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:18,196 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:18,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:18,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:18,196 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand 9 states. [2019-10-14 23:17:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:20,409 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2019-10-14 23:17:20,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:20,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2019-10-14 23:17:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:20,411 INFO L225 Difference]: With dead ends: 92 [2019-10-14 23:17:20,411 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 23:17:20,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 23:17:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-10-14 23:17:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 23:17:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2019-10-14 23:17:20,424 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 69 [2019-10-14 23:17:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:20,425 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2019-10-14 23:17:20,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2019-10-14 23:17:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 23:17:20,431 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:20,431 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2019-10-14 23:17:20,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:20,633 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:20,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:20,633 INFO L82 PathProgramCache]: Analyzing trace with hash 713083767, now seen corresponding path program 1 times [2019-10-14 23:17:20,634 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:20,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848754755] [2019-10-14 23:17:20,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:20,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:20,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:20,641 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:20,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62366576] [2019-10-14 23:17:20,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:20,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:17:20,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:20,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-10-14 23:17:20,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848754755] [2019-10-14 23:17:20,817 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:20,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62366576] [2019-10-14 23:17:20,818 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:20,818 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:20,818 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005256307] [2019-10-14 23:17:20,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:20,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:20,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:20,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:20,826 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand 9 states. [2019-10-14 23:17:21,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:21,249 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2019-10-14 23:17:21,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:21,251 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2019-10-14 23:17:21,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:21,253 INFO L225 Difference]: With dead ends: 96 [2019-10-14 23:17:21,254 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 23:17:21,254 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 23:17:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-10-14 23:17:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-14 23:17:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2019-10-14 23:17:21,272 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 73 [2019-10-14 23:17:21,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:21,272 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2019-10-14 23:17:21,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2019-10-14 23:17:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 23:17:21,274 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:21,274 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:21,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:21,483 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:21,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1693450736, now seen corresponding path program 5 times [2019-10-14 23:17:21,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:21,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927539749] [2019-10-14 23:17:21,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:21,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:21,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:21,491 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:21,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133212856] [2019-10-14 23:17:21,492 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:21,543 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 23:17:21,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:21,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:17:21,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 23 proven. 49 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-10-14 23:17:21,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927539749] [2019-10-14 23:17:21,621 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:21,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133212856] [2019-10-14 23:17:21,622 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:21,622 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:21,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573751351] [2019-10-14 23:17:21,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:21,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:21,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:21,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:21,624 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 9 states. [2019-10-14 23:17:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:22,141 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2019-10-14 23:17:22,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:22,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2019-10-14 23:17:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:22,143 INFO L225 Difference]: With dead ends: 113 [2019-10-14 23:17:22,143 INFO L226 Difference]: Without dead ends: 99 [2019-10-14 23:17:22,144 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:22,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-14 23:17:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2019-10-14 23:17:22,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 23:17:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2019-10-14 23:17:22,154 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 74 [2019-10-14 23:17:22,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:22,155 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2019-10-14 23:17:22,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:22,155 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2019-10-14 23:17:22,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 23:17:22,156 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:22,156 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:22,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:22,368 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1818484460, now seen corresponding path program 6 times [2019-10-14 23:17:22,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:22,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315403800] [2019-10-14 23:17:22,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:22,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:22,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:22,374 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:22,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869511732] [2019-10-14 23:17:22,375 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:22,605 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 23:17:22,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:22,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 23:17:22,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 28 proven. 51 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-14 23:17:22,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315403800] [2019-10-14 23:17:22,734 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:22,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869511732] [2019-10-14 23:17:22,734 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:22,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:22,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747836843] [2019-10-14 23:17:22,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:22,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:22,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:22,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:22,736 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand 9 states. [2019-10-14 23:17:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:23,122 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2019-10-14 23:17:23,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:23,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2019-10-14 23:17:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:23,124 INFO L225 Difference]: With dead ends: 109 [2019-10-14 23:17:23,124 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 23:17:23,125 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 23:17:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-10-14 23:17:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-14 23:17:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 118 transitions. [2019-10-14 23:17:23,136 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 118 transitions. Word has length 79 [2019-10-14 23:17:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:23,136 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 118 transitions. [2019-10-14 23:17:23,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 118 transitions. [2019-10-14 23:17:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 23:17:23,138 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:23,138 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:23,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:23,349 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash -622434639, now seen corresponding path program 2 times [2019-10-14 23:17:23,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:23,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376704954] [2019-10-14 23:17:23,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:23,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:23,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:23,357 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:23,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452865290] [2019-10-14 23:17:23,357 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:23,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:23,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:23,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 23:17:23,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:23,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-10-14 23:17:23,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376704954] [2019-10-14 23:17:23,530 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:23,530 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452865290] [2019-10-14 23:17:23,530 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:23,530 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:23,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733084662] [2019-10-14 23:17:23,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:23,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:23,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:23,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:23,532 INFO L87 Difference]: Start difference. First operand 104 states and 118 transitions. Second operand 10 states. [2019-10-14 23:17:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:24,015 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2019-10-14 23:17:24,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:24,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 95 [2019-10-14 23:17:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:24,018 INFO L225 Difference]: With dead ends: 114 [2019-10-14 23:17:24,018 INFO L226 Difference]: Without dead ends: 112 [2019-10-14 23:17:24,019 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-14 23:17:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-10-14 23:17:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-14 23:17:24,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2019-10-14 23:17:24,029 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 95 [2019-10-14 23:17:24,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:24,029 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2019-10-14 23:17:24,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:24,029 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2019-10-14 23:17:24,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 23:17:24,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:24,031 INFO L380 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:24,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:24,235 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:24,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1439689715, now seen corresponding path program 2 times [2019-10-14 23:17:24,236 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:24,237 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309661686] [2019-10-14 23:17:24,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:24,238 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:24,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:24,243 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:24,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418826639] [2019-10-14 23:17:24,244 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:24,286 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:24,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:24,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:17:24,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:24,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 33 proven. 70 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-10-14 23:17:24,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309661686] [2019-10-14 23:17:24,395 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:24,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418826639] [2019-10-14 23:17:24,395 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:24,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:24,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439429014] [2019-10-14 23:17:24,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:24,396 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:24,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:24,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:24,397 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand 10 states. [2019-10-14 23:17:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:24,889 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2019-10-14 23:17:24,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:24,890 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 100 [2019-10-14 23:17:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:24,891 INFO L225 Difference]: With dead ends: 122 [2019-10-14 23:17:24,892 INFO L226 Difference]: Without dead ends: 109 [2019-10-14 23:17:24,892 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-14 23:17:24,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-10-14 23:17:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 23:17:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2019-10-14 23:17:24,901 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 100 [2019-10-14 23:17:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:24,902 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2019-10-14 23:17:24,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2019-10-14 23:17:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-14 23:17:24,903 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:24,903 INFO L380 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:25,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:25,107 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:25,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:25,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1551568652, now seen corresponding path program 7 times [2019-10-14 23:17:25,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:25,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613002553] [2019-10-14 23:17:25,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:25,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:25,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:25,115 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:25,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609032272] [2019-10-14 23:17:25,115 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:25,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-14 23:17:25,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-10-14 23:17:25,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613002553] [2019-10-14 23:17:25,270 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:25,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609032272] [2019-10-14 23:17:25,271 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:25,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:25,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654467456] [2019-10-14 23:17:25,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:25,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:25,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:25,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:25,273 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand 10 states. [2019-10-14 23:17:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:25,805 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2019-10-14 23:17:25,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:25,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 101 [2019-10-14 23:17:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:25,812 INFO L225 Difference]: With dead ends: 128 [2019-10-14 23:17:25,812 INFO L226 Difference]: Without dead ends: 126 [2019-10-14 23:17:25,812 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-14 23:17:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2019-10-14 23:17:25,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 23:17:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2019-10-14 23:17:25,825 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 101 [2019-10-14 23:17:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:25,827 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2019-10-14 23:17:25,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2019-10-14 23:17:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 23:17:25,829 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:25,829 INFO L380 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:26,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:26,033 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash 781710480, now seen corresponding path program 8 times [2019-10-14 23:17:26,033 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:26,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407615289] [2019-10-14 23:17:26,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:26,041 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:26,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174774254] [2019-10-14 23:17:26,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:26,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:26,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:26,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-14 23:17:26,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 80 proven. 43 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-10-14 23:17:26,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407615289] [2019-10-14 23:17:26,223 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:26,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174774254] [2019-10-14 23:17:26,224 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:26,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:17:26,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578935379] [2019-10-14 23:17:26,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:17:26,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:26,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:17:26,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:26,228 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand 11 states. [2019-10-14 23:17:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:26,818 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2019-10-14 23:17:26,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:26,819 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 106 [2019-10-14 23:17:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:26,820 INFO L225 Difference]: With dead ends: 140 [2019-10-14 23:17:26,820 INFO L226 Difference]: Without dead ends: 135 [2019-10-14 23:17:26,821 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:26,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-14 23:17:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2019-10-14 23:17:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-14 23:17:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 148 transitions. [2019-10-14 23:17:26,835 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 148 transitions. Word has length 106 [2019-10-14 23:17:26,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:26,835 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 148 transitions. [2019-10-14 23:17:26,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:17:26,836 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 148 transitions. [2019-10-14 23:17:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 23:17:26,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:26,839 INFO L380 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:27,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:27,046 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:27,047 INFO L82 PathProgramCache]: Analyzing trace with hash 874758701, now seen corresponding path program 3 times [2019-10-14 23:17:27,047 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:27,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756662847] [2019-10-14 23:17:27,048 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:27,054 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:27,054 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784693815] [2019-10-14 23:17:27,054 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true