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/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:15:49,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:15:49,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:15:49,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:15:49,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:15:49,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:15:49,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:15:49,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:15:49,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:15:49,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:15:49,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:15:49,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:15:49,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:15:49,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:15:49,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:15:49,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:15:49,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:15:49,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:15:49,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:15:49,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:15:49,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:15:49,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:15:49,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:15:49,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:15:49,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:15:49,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:15:49,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:15:49,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:15:49,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:15:49,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:15:49,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:15:49,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:15:49,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:15:49,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:15:49,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:15:49,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:15:49,183 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 23:15:49,197 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:15:49,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:15:49,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:15:49,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:15:49,199 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:15:49,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:15:49,199 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:15:49,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:15:49,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:15:49,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:15:49,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:15:49,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:15:49,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:15:49,201 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:15:49,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:15:49,201 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:15:49,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:15:49,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:15:49,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:15:49,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:15:49,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:15:49,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:49,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:15:49,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:15:49,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:15:49,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:15:49,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:15:49,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:15:49,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:15:49,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:15:49,526 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:15:49,531 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:15:49,533 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:15:49,533 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:15:49,534 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2019-10-14 23:15:49,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/557964dd8/03f2f8132d5a4cb4a2c8d826bb3e36b3/FLAGfe11e1e00 [2019-10-14 23:15:50,037 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:15:50,038 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2019-10-14 23:15:50,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/557964dd8/03f2f8132d5a4cb4a2c8d826bb3e36b3/FLAGfe11e1e00 [2019-10-14 23:15:50,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/557964dd8/03f2f8132d5a4cb4a2c8d826bb3e36b3 [2019-10-14 23:15:50,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:15:50,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:15:50,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:50,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:15:50,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:15:50,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:50" (1/1) ... [2019-10-14 23:15:50,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34519ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:50, skipping insertion in model container [2019-10-14 23:15:50,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:50" (1/1) ... [2019-10-14 23:15:50,463 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:15:50,480 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:15:50,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:50,634 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:15:50,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:50,662 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:15:50,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:50 WrapperNode [2019-10-14 23:15:50,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:50,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:15:50,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:15:50,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:15:50,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:50" (1/1) ... [2019-10-14 23:15:50,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:50" (1/1) ... [2019-10-14 23:15:50,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:50" (1/1) ... [2019-10-14 23:15:50,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:50" (1/1) ... [2019-10-14 23:15:50,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:50" (1/1) ... [2019-10-14 23:15:50,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:50" (1/1) ... [2019-10-14 23:15:50,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:50" (1/1) ... [2019-10-14 23:15:50,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:15:50,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:15:50,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:15:50,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:15:50,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:50,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:15:50,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:15:50,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:15:50,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:15:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:15:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:15:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:15:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:15:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:15:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:15:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:15:51,000 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:15:51,001 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:15:51,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:51 BoogieIcfgContainer [2019-10-14 23:15:51,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:15:51,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:15:51,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:15:51,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:15:51,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:15:50" (1/3) ... [2019-10-14 23:15:51,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7103ec2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:51, skipping insertion in model container [2019-10-14 23:15:51,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:50" (2/3) ... [2019-10-14 23:15:51,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7103ec2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:51, skipping insertion in model container [2019-10-14 23:15:51,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:51" (3/3) ... [2019-10-14 23:15:51,025 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2019-10-14 23:15:51,038 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:15:51,050 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:15:51,089 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:15:51,138 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:15:51,139 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:15:51,140 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:15:51,140 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:15:51,141 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:15:51,141 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:15:51,141 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:15:51,141 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:15:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-14 23:15:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:15:51,163 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:51,164 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:51,166 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:51,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1281911547, now seen corresponding path program 1 times [2019-10-14 23:15:51,179 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:51,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33376919] [2019-10-14 23:15:51,180 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:51,180 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:51,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,293 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 23:15:51,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33376919] [2019-10-14 23:15:51,294 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:51,294 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:15:51,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628439707] [2019-10-14 23:15:51,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:15:51,299 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:51,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:15:51,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:15:51,312 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-14 23:15:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:51,330 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-10-14 23:15:51,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:15:51,331 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-10-14 23:15:51,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:51,339 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:15:51,340 INFO L226 Difference]: Without dead ends: 13 [2019-10-14 23:15:51,343 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 23:15:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-14 23:15:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-14 23:15:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-14 23:15:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-14 23:15:51,381 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-14 23:15:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:51,382 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-14 23:15:51,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:15:51,382 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-14 23:15:51,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:15:51,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:51,383 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:51,384 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:51,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:51,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1287452673, now seen corresponding path program 1 times [2019-10-14 23:15:51,384 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:51,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390078068] [2019-10-14 23:15:51,385 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:51,385 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:51,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:51,393 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:51,394 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730066584] [2019-10-14 23:15:51,394 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 23:15:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:15:51,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:51,518 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 23:15:51,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390078068] [2019-10-14 23:15:51,520 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:51,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730066584] [2019-10-14 23:15:51,521 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:51,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:15:51,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83326676] [2019-10-14 23:15:51,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:15:51,525 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:51,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:15:51,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:15:51,526 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2019-10-14 23:15:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:51,571 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-14 23:15:51,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:15:51,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-14 23:15:51,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:51,574 INFO L225 Difference]: With dead ends: 20 [2019-10-14 23:15:51,574 INFO L226 Difference]: Without dead ends: 15 [2019-10-14 23:15:51,575 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:15:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-14 23:15:51,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-10-14 23:15:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-14 23:15:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-14 23:15:51,585 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-10-14 23:15:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:51,586 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-14 23:15:51,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:15:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-14 23:15:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 23:15:51,588 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:51,588 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:51,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:51,792 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash 843923389, now seen corresponding path program 1 times [2019-10-14 23:15:51,793 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:51,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676815427] [2019-10-14 23:15:51,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:51,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:51,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:51,822 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:51,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665251752] [2019-10-14 23:15:51,822 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 23:15:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:15:51,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:51,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:51,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676815427] [2019-10-14 23:15:51,964 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:51,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665251752] [2019-10-14 23:15:51,965 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:51,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:15:51,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141458667] [2019-10-14 23:15:51,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:15:51,969 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:51,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:15:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:15:51,970 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2019-10-14 23:15:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:52,116 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-14 23:15:52,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:15:52,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-10-14 23:15:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:52,118 INFO L225 Difference]: With dead ends: 21 [2019-10-14 23:15:52,118 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:15:52,119 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:15:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:15:52,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-14 23:15:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:15:52,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-14 23:15:52,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-10-14 23:15:52,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:52,124 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-14 23:15:52,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:15:52,124 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-14 23:15:52,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:15:52,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:52,125 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:52,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:52,329 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:52,330 INFO L82 PathProgramCache]: Analyzing trace with hash 396918779, now seen corresponding path program 2 times [2019-10-14 23:15:52,330 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:52,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551786380] [2019-10-14 23:15:52,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:52,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:52,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:52,355 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:52,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607009723] [2019-10-14 23:15:52,356 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:52,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:52,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:52,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:15:52,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:52,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:52,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551786380] [2019-10-14 23:15:52,560 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:52,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607009723] [2019-10-14 23:15:52,561 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:52,561 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:15:52,561 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004418496] [2019-10-14 23:15:52,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:15:52,562 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:52,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:15:52,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:15:52,563 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2019-10-14 23:15:52,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:52,683 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-10-14 23:15:52,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:15:52,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-10-14 23:15:52,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:52,684 INFO L225 Difference]: With dead ends: 23 [2019-10-14 23:15:52,684 INFO L226 Difference]: Without dead ends: 18 [2019-10-14 23:15:52,685 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:15:52,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-14 23:15:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-14 23:15:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 23:15:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-14 23:15:52,690 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2019-10-14 23:15:52,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:52,690 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-14 23:15:52,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:15:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-14 23:15:52,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:15:52,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:52,691 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:52,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:52,898 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash 322218169, now seen corresponding path program 3 times [2019-10-14 23:15:52,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:52,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350287841] [2019-10-14 23:15:52,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:52,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:52,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:52,908 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:52,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326921862] [2019-10-14 23:15:52,908 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 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 23:15:52,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:15:52,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:52,940 WARN L254 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:15:52,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:53,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:53,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350287841] [2019-10-14 23:15:53,105 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:53,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326921862] [2019-10-14 23:15:53,106 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:53,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:15:53,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576274215] [2019-10-14 23:15:53,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:15:53,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:53,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:15:53,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:15:53,110 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 12 states. [2019-10-14 23:15:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:53,270 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-10-14 23:15:53,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:15:53,271 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-10-14 23:15:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:53,272 INFO L225 Difference]: With dead ends: 25 [2019-10-14 23:15:53,272 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 23:15:53,273 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 23:15:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 23:15:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 23:15:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-14 23:15:53,277 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2019-10-14 23:15:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:53,278 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-14 23:15:53,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:15:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-14 23:15:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:15:53,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:53,279 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:53,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:53,483 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:53,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1549375991, now seen corresponding path program 4 times [2019-10-14 23:15:53,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:53,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473970320] [2019-10-14 23:15:53,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:53,495 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:53,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063299259] [2019-10-14 23:15:53,496 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 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 23:15:53,524 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:53,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:53,526 WARN L254 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 23:15:53,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:53,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:53,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473970320] [2019-10-14 23:15:53,738 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:53,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063299259] [2019-10-14 23:15:53,738 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:53,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 23:15:53,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416026628] [2019-10-14 23:15:53,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:15:53,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:53,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:15:53,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:53,742 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 14 states. [2019-10-14 23:15:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:53,909 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-14 23:15:53,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:15:53,910 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-10-14 23:15:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:53,911 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:15:53,912 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:15:53,912 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:53,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:15:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 23:15:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 23:15:53,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-14 23:15:53,917 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2019-10-14 23:15:53,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:53,918 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-14 23:15:53,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:15:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-14 23:15:53,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:15:53,919 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:53,919 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,122 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,123 INFO L82 PathProgramCache]: Analyzing trace with hash -267963467, now seen corresponding path program 5 times [2019-10-14 23:15:54,124 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593600292] [2019-10-14 23:15:54,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,145 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:54,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449202618] [2019-10-14 23:15:54,145 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 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 23:15:54,186 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 23:15:54,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:54,187 WARN L254 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:15:54,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:54,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:54,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593600292] [2019-10-14 23:15:54,450 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:54,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449202618] [2019-10-14 23:15:54,450 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:54,450 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-14 23:15:54,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473975936] [2019-10-14 23:15:54,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:15:54,452 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:54,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:15:54,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:54,452 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 16 states. [2019-10-14 23:15:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:54,667 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-14 23:15:54,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:15:54,668 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-10-14 23:15:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:54,669 INFO L225 Difference]: With dead ends: 29 [2019-10-14 23:15:54,670 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:15:54,671 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:15:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:15:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 23:15:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:15:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-14 23:15:54,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2019-10-14 23:15:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:54,677 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-14 23:15:54,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:15:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-14 23:15:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:15:54,678 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:54,678 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,879 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1320506867, now seen corresponding path program 6 times [2019-10-14 23:15:54,880 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703043270] [2019-10-14 23:15:54,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,892 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:54,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675375782] [2019-10-14 23:15:54,893 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 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 23:15:54,934 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:15:54,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:54,936 WARN L254 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 23:15:54,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:55,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703043270] [2019-10-14 23:15:55,212 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:55,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675375782] [2019-10-14 23:15:55,213 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:55,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-14 23:15:55,213 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812616763] [2019-10-14 23:15:55,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:15:55,214 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:55,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:15:55,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:15:55,215 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 18 states. [2019-10-14 23:15:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:55,457 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-14 23:15:55,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:15:55,461 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2019-10-14 23:15:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:55,461 INFO L225 Difference]: With dead ends: 31 [2019-10-14 23:15:55,462 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:15:55,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:15:55,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:15:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 23:15:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 23:15:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-14 23:15:55,467 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2019-10-14 23:15:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:55,468 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-14 23:15:55,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:15:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-14 23:15:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 23:15:55,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:55,468 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:55,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,670 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:55,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:55,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1167859535, now seen corresponding path program 7 times [2019-10-14 23:15:55,671 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:55,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968393356] [2019-10-14 23:15:55,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:55,681 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:55,682 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946251049] [2019-10-14 23:15:55,682 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 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 23:15:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:55,718 WARN L254 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:55,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:56,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968393356] [2019-10-14 23:15:56,030 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:56,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946251049] [2019-10-14 23:15:56,030 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:56,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-14 23:15:56,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023086814] [2019-10-14 23:15:56,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:15:56,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:56,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:15:56,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:15:56,032 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 20 states. [2019-10-14 23:15:56,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:56,320 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-10-14 23:15:56,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:15:56,320 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2019-10-14 23:15:56,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:56,321 INFO L225 Difference]: With dead ends: 33 [2019-10-14 23:15:56,321 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:15:56,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:15:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:15:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 23:15:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:15:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-14 23:15:56,327 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2019-10-14 23:15:56,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:56,327 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-14 23:15:56,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:15:56,327 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-14 23:15:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 23:15:56,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:56,328 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:56,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:56,537 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:56,537 INFO L82 PathProgramCache]: Analyzing trace with hash -191187985, now seen corresponding path program 8 times [2019-10-14 23:15:56,537 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:56,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043575647] [2019-10-14 23:15:56,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:56,549 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:56,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491412888] [2019-10-14 23:15:56,550 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 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 23:15:56,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:56,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:56,587 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-14 23:15:56,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:56,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:56,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043575647] [2019-10-14 23:15:56,945 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:56,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491412888] [2019-10-14 23:15:56,946 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:56,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-14 23:15:56,946 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165720127] [2019-10-14 23:15:56,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 23:15:56,946 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:56,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 23:15:56,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:15:56,947 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 22 states. [2019-10-14 23:15:57,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:57,286 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-14 23:15:57,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:15:57,287 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2019-10-14 23:15:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:57,288 INFO L225 Difference]: With dead ends: 35 [2019-10-14 23:15:57,288 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:15:57,291 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:15:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:15:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-14 23:15:57,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:15:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-10-14 23:15:57,300 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2019-10-14 23:15:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:57,301 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-10-14 23:15:57,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 23:15:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-10-14 23:15:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:15:57,302 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:57,302 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:57,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,504 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:57,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2087301037, now seen corresponding path program 9 times [2019-10-14 23:15:57,506 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:57,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728744559] [2019-10-14 23:15:57,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:57,521 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:57,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316691631] [2019-10-14 23:15:57,521 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 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 23:15:57,564 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 23:15:57,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:57,566 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-14 23:15:57,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:57,905 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:57,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728744559] [2019-10-14 23:15:57,951 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:57,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316691631] [2019-10-14 23:15:57,952 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:57,952 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-14 23:15:57,952 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128698959] [2019-10-14 23:15:57,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:15:57,953 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:57,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:15:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:15:57,953 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 24 states. [2019-10-14 23:15:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:58,365 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-10-14 23:15:58,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:15:58,365 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2019-10-14 23:15:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:58,366 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:15:58,366 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:15:58,367 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:15:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:15:58,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 23:15:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:15:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-14 23:15:58,371 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2019-10-14 23:15:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:58,372 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-14 23:15:58,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:15:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-14 23:15:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:15:58,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:58,373 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:58,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,577 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:58,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1281930219, now seen corresponding path program 10 times [2019-10-14 23:15:58,578 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:58,578 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580390441] [2019-10-14 23:15:58,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:58,590 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:58,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149656822] [2019-10-14 23:15:58,591 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 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 23:15:58,625 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:58,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:58,627 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-14 23:15:58,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:58,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:59,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580390441] [2019-10-14 23:15:59,039 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:59,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149656822] [2019-10-14 23:15:59,039 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:59,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-14 23:15:59,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288945850] [2019-10-14 23:15:59,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 23:15:59,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:59,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 23:15:59,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:15:59,041 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 26 states. [2019-10-14 23:15:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:59,456 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-10-14 23:15:59,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 23:15:59,456 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2019-10-14 23:15:59,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:59,458 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:15:59,458 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:15:59,459 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:15:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:15:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 23:15:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:15:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-14 23:15:59,464 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2019-10-14 23:15:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:59,465 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-14 23:15:59,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 23:15:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-14 23:15:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 23:15:59,466 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:59,466 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:59,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:59,670 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:59,671 INFO L82 PathProgramCache]: Analyzing trace with hash 414687401, now seen corresponding path program 11 times [2019-10-14 23:15:59,671 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:59,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387672032] [2019-10-14 23:15:59,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:59,686 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:59,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964084060] [2019-10-14 23:15:59,687 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 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 23:15:59,730 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 23:15:59,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:59,735 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-14 23:15:59,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:00,116 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:00,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387672032] [2019-10-14 23:16:00,173 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:00,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964084060] [2019-10-14 23:16:00,174 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:00,174 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-14 23:16:00,174 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554990535] [2019-10-14 23:16:00,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:16:00,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:00,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:16:00,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:16:00,176 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 28 states. [2019-10-14 23:16:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:00,727 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-10-14 23:16:00,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:16:00,728 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2019-10-14 23:16:00,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:00,729 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:16:00,729 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:16:00,730 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:16:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:16:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 23:16:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:16:00,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-10-14 23:16:00,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2019-10-14 23:16:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:00,737 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-10-14 23:16:00,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:16:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-10-14 23:16:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:16:00,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:00,738 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:00,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:00,942 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:00,942 INFO L82 PathProgramCache]: Analyzing trace with hash 217994727, now seen corresponding path program 12 times [2019-10-14 23:16:00,943 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:00,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882121958] [2019-10-14 23:16:00,943 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:00,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:00,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:00,955 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:00,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441475533] [2019-10-14 23:16:00,956 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 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 23:16:01,016 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:16:01,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:01,017 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-14 23:16:01,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:01,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:01,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882121958] [2019-10-14 23:16:01,519 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:01,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441475533] [2019-10-14 23:16:01,519 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:01,520 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-14 23:16:01,520 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925654167] [2019-10-14 23:16:01,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:16:01,520 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:01,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:16:01,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:16:01,521 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 30 states. [2019-10-14 23:16:02,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:02,096 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-10-14 23:16:02,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 23:16:02,096 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2019-10-14 23:16:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:02,097 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:16:02,097 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:16:02,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=926, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:16:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:16:02,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 23:16:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:16:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-10-14 23:16:02,103 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2019-10-14 23:16:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:02,103 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-10-14 23:16:02,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:16:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-10-14 23:16:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:16:02,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:02,105 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:02,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:02,309 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:02,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:02,309 INFO L82 PathProgramCache]: Analyzing trace with hash 174896037, now seen corresponding path program 13 times [2019-10-14 23:16:02,309 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:02,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093755386] [2019-10-14 23:16:02,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:02,324 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:02,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433536533] [2019-10-14 23:16:02,324 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 23:16:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:02,376 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-14 23:16:02,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:02,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:03,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093755386] [2019-10-14 23:16:03,004 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:03,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433536533] [2019-10-14 23:16:03,004 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:03,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-10-14 23:16:03,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677515203] [2019-10-14 23:16:03,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 23:16:03,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:03,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 23:16:03,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:16:03,006 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 32 states. [2019-10-14 23:16:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:03,662 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-10-14 23:16:03,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:16:03,662 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2019-10-14 23:16:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:03,663 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:16:03,663 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:16:03,664 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:16:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:16:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 23:16:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:16:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-14 23:16:03,670 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2019-10-14 23:16:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:03,670 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-14 23:16:03,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 23:16:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-14 23:16:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:16:03,671 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:03,671 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:03,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:03,874 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:03,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1706727907, now seen corresponding path program 14 times [2019-10-14 23:16:03,875 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:03,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201698260] [2019-10-14 23:16:03,876 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,876 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:03,887 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:03,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360324137] [2019-10-14 23:16:03,888 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 23:16:03,946 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:03,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:03,947 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-14 23:16:03,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:04,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:04,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201698260] [2019-10-14 23:16:04,570 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:04,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360324137] [2019-10-14 23:16:04,571 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:04,571 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-10-14 23:16:04,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341389062] [2019-10-14 23:16:04,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:16:04,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:04,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:16:04,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:16:04,572 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 34 states. [2019-10-14 23:16:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:05,450 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-10-14 23:16:05,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:16:05,450 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2019-10-14 23:16:05,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:05,451 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:16:05,451 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:16:05,452 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=1186, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:16:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:16:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-14 23:16:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 23:16:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-10-14 23:16:05,458 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2019-10-14 23:16:05,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:05,458 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-10-14 23:16:05,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:16:05,458 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-10-14 23:16:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:16:05,459 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:05,459 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:05,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:05,660 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:05,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:05,660 INFO L82 PathProgramCache]: Analyzing trace with hash 623372449, now seen corresponding path program 15 times [2019-10-14 23:16:05,661 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:05,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279409819] [2019-10-14 23:16:05,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:05,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:05,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:05,691 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:05,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906728450] [2019-10-14 23:16:05,692 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 [2019-10-14 23:16:05,781 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-14 23:16:05,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:05,782 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-14 23:16:05,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:06,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:06,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279409819] [2019-10-14 23:16:06,603 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:06,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906728450] [2019-10-14 23:16:06,603 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:06,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-10-14 23:16:06,604 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26886616] [2019-10-14 23:16:06,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 23:16:06,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 23:16:06,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:16:06,605 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 36 states. [2019-10-14 23:16:07,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:07,483 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-10-14 23:16:07,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 23:16:07,485 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2019-10-14 23:16:07,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:07,486 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:16:07,486 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:16:07,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=1328, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:16:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:16:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 23:16:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:16:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-10-14 23:16:07,492 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2019-10-14 23:16:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:07,493 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-10-14 23:16:07,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 23:16:07,493 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-10-14 23:16:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:16:07,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:07,494 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:07,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:07,703 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1099137057, now seen corresponding path program 16 times [2019-10-14 23:16:07,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:07,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016153074] [2019-10-14 23:16:07,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:07,715 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:07,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749240667] [2019-10-14 23:16:07,715 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:07,760 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:07,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:07,761 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-14 23:16:07,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:08,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:08,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016153074] [2019-10-14 23:16:08,517 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:08,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749240667] [2019-10-14 23:16:08,518 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:08,518 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-10-14 23:16:08,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418348312] [2019-10-14 23:16:08,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 23:16:08,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:08,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 23:16:08,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:16:08,519 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 38 states. [2019-10-14 23:16:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:09,402 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-10-14 23:16:09,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 23:16:09,403 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2019-10-14 23:16:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:09,404 INFO L225 Difference]: With dead ends: 51 [2019-10-14 23:16:09,404 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:16:09,405 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 23:16:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:16:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 23:16:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 23:16:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-10-14 23:16:09,413 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2019-10-14 23:16:09,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:09,414 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-10-14 23:16:09,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 23:16:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-10-14 23:16:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:16:09,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:09,415 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:09,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,618 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:09,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1426603933, now seen corresponding path program 17 times [2019-10-14 23:16:09,619 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:09,619 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048227735] [2019-10-14 23:16:09,620 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,620 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:09,631 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:09,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975020288] [2019-10-14 23:16:09,631 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,693 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 23:16:09,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:09,695 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 79 conjunts are in the unsatisfiable core [2019-10-14 23:16:09,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:10,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:10,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048227735] [2019-10-14 23:16:10,589 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:10,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975020288] [2019-10-14 23:16:10,589 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:10,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-10-14 23:16:10,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907338983] [2019-10-14 23:16:10,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 23:16:10,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:10,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 23:16:10,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 23:16:10,591 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 40 states. [2019-10-14 23:16:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:11,571 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-10-14 23:16:11,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 23:16:11,571 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 45 [2019-10-14 23:16:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:11,572 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:16:11,572 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:16:11,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:16:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:16:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-14 23:16:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 23:16:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-10-14 23:16:11,578 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2019-10-14 23:16:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:11,579 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-10-14 23:16:11,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 23:16:11,579 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-10-14 23:16:11,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:16:11,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:11,580 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:11,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,783 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:11,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:11,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2007173083, now seen corresponding path program 18 times [2019-10-14 23:16:11,784 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:11,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305535536] [2019-10-14 23:16:11,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:11,803 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:11,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699085600] [2019-10-14 23:16:11,803 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,919 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 23:16:11,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:11,921 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-14 23:16:11,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:12,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:12,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305535536] [2019-10-14 23:16:12,856 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:12,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699085600] [2019-10-14 23:16:12,857 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:12,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-10-14 23:16:12,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226485164] [2019-10-14 23:16:12,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 23:16:12,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 23:16:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:16:12,858 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 42 states. [2019-10-14 23:16:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:14,005 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-10-14 23:16:14,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 23:16:14,005 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 47 [2019-10-14 23:16:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:14,006 INFO L225 Difference]: With dead ends: 55 [2019-10-14 23:16:14,006 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 23:16:14,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=1802, Unknown=0, NotChecked=0, Total=1892 [2019-10-14 23:16:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 23:16:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-14 23:16:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 23:16:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-10-14 23:16:14,012 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2019-10-14 23:16:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:14,013 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-10-14 23:16:14,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 23:16:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-10-14 23:16:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:16:14,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:14,014 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:14,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:14,215 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:14,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1588377753, now seen corresponding path program 19 times [2019-10-14 23:16:14,216 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:14,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278085473] [2019-10-14 23:16:14,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:14,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:14,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:14,225 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:14,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561155766] [2019-10-14 23:16:14,226 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:14,296 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-14 23:16:14,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:15,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:15,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278085473] [2019-10-14 23:16:15,312 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:15,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561155766] [2019-10-14 23:16:15,313 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:15,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-10-14 23:16:15,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024035110] [2019-10-14 23:16:15,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-14 23:16:15,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:15,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-14 23:16:15,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2019-10-14 23:16:15,315 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 44 states. [2019-10-14 23:16:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:16,468 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-10-14 23:16:16,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-14 23:16:16,469 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 49 [2019-10-14 23:16:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:16,470 INFO L225 Difference]: With dead ends: 57 [2019-10-14 23:16:16,470 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:16:16,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2019-10-14 23:16:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:16:16,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-14 23:16:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 23:16:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-10-14 23:16:16,477 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2019-10-14 23:16:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:16,477 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-10-14 23:16:16,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-14 23:16:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-10-14 23:16:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 23:16:16,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:16,478 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:16,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:16,682 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:16,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1441975849, now seen corresponding path program 20 times [2019-10-14 23:16:16,683 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:16,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468373882] [2019-10-14 23:16:16,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:16,693 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:16,693 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873435480] [2019-10-14 23:16:16,694 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:16,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:16,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:16,770 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 91 conjunts are in the unsatisfiable core [2019-10-14 23:16:16,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:17,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:17,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468373882] [2019-10-14 23:16:17,905 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:17,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873435480] [2019-10-14 23:16:17,905 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:17,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-10-14 23:16:17,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646417542] [2019-10-14 23:16:17,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-14 23:16:17,906 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-14 23:16:17,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2019-10-14 23:16:17,907 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 46 states. [2019-10-14 23:16:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:19,185 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-10-14 23:16:19,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-14 23:16:19,185 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 51 [2019-10-14 23:16:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:19,186 INFO L225 Difference]: With dead ends: 59 [2019-10-14 23:16:19,186 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 23:16:19,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2019-10-14 23:16:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 23:16:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-14 23:16:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 23:16:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-10-14 23:16:19,192 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2019-10-14 23:16:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:19,192 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-10-14 23:16:19,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-14 23:16:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-10-14 23:16:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 23:16:19,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:19,193 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:19,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:19,394 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:19,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1623960683, now seen corresponding path program 21 times [2019-10-14 23:16:19,395 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:19,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61376729] [2019-10-14 23:16:19,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:19,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:19,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:19,404 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:19,404 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277558538] [2019-10-14 23:16:19,404 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:19,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-14 23:16:19,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:19,554 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 95 conjunts are in the unsatisfiable core [2019-10-14 23:16:19,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:20,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:20,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61376729] [2019-10-14 23:16:20,759 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:20,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277558538] [2019-10-14 23:16:20,759 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:20,760 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-10-14 23:16:20,760 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594797090] [2019-10-14 23:16:20,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-10-14 23:16:20,760 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:20,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-10-14 23:16:20,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2019-10-14 23:16:20,761 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 48 states. [2019-10-14 23:16:22,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:22,203 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-10-14 23:16:22,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-14 23:16:22,203 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 53 [2019-10-14 23:16:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:22,204 INFO L225 Difference]: With dead ends: 61 [2019-10-14 23:16:22,204 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 23:16:22,205 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=2348, Unknown=0, NotChecked=0, Total=2450 [2019-10-14 23:16:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 23:16:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-14 23:16:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 23:16:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-10-14 23:16:22,210 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2019-10-14 23:16:22,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:22,210 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-10-14 23:16:22,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-10-14 23:16:22,211 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-10-14 23:16:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 23:16:22,211 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:22,211 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:22,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:22,415 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:22,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:22,416 INFO L82 PathProgramCache]: Analyzing trace with hash -417727021, now seen corresponding path program 22 times [2019-10-14 23:16:22,416 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:22,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730180497] [2019-10-14 23:16:22,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:22,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:22,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:22,426 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:22,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087358960] [2019-10-14 23:16:22,426 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:22,500 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:22,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:22,502 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 99 conjunts are in the unsatisfiable core [2019-10-14 23:16:22,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:23,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:23,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730180497] [2019-10-14 23:16:23,737 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:23,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087358960] [2019-10-14 23:16:23,737 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:23,737 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-10-14 23:16:23,737 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313144504] [2019-10-14 23:16:23,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-14 23:16:23,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:23,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-14 23:16:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2019-10-14 23:16:23,739 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 50 states. [2019-10-14 23:16:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:25,256 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-10-14 23:16:25,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-10-14 23:16:25,257 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 55 [2019-10-14 23:16:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:25,258 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:16:25,258 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 23:16:25,260 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2019-10-14 23:16:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 23:16:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-10-14 23:16:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 23:16:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-10-14 23:16:25,265 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2019-10-14 23:16:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:25,265 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-10-14 23:16:25,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-10-14 23:16:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-10-14 23:16:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 23:16:25,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:25,266 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:25,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:25,467 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:25,467 INFO L82 PathProgramCache]: Analyzing trace with hash -868347759, now seen corresponding path program 23 times [2019-10-14 23:16:25,468 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:25,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200477715] [2019-10-14 23:16:25,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:25,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:25,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:25,478 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:25,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229030077] [2019-10-14 23:16:25,478 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:25,562 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-14 23:16:25,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:25,564 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 103 conjunts are in the unsatisfiable core [2019-10-14 23:16:25,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:26,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:26,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200477715] [2019-10-14 23:16:26,917 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:26,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229030077] [2019-10-14 23:16:26,917 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:26,917 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-10-14 23:16:26,917 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322926111] [2019-10-14 23:16:26,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-10-14 23:16:26,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:26,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-10-14 23:16:26,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2019-10-14 23:16:26,919 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 52 states. [2019-10-14 23:16:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:28,548 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-10-14 23:16:28,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-10-14 23:16:28,550 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 57 [2019-10-14 23:16:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:28,551 INFO L225 Difference]: With dead ends: 65 [2019-10-14 23:16:28,551 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 23:16:28,552 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=2752, Unknown=0, NotChecked=0, Total=2862 [2019-10-14 23:16:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 23:16:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-10-14 23:16:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 23:16:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-10-14 23:16:28,555 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2019-10-14 23:16:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:28,555 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-10-14 23:16:28,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-10-14 23:16:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-10-14 23:16:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 23:16:28,556 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:28,556 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:28,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:28,757 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:28,758 INFO L82 PathProgramCache]: Analyzing trace with hash -123180081, now seen corresponding path program 24 times [2019-10-14 23:16:28,758 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:28,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653806223] [2019-10-14 23:16:28,758 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:28,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:28,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:28,767 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:28,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263218965] [2019-10-14 23:16:28,767 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:28,880 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-14 23:16:28,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:28,882 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-14 23:16:28,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:30,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:30,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653806223] [2019-10-14 23:16:30,323 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:30,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263218965] [2019-10-14 23:16:30,324 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:30,324 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-10-14 23:16:30,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180847161] [2019-10-14 23:16:30,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-14 23:16:30,325 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:30,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-14 23:16:30,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2019-10-14 23:16:30,326 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 54 states. [2019-10-14 23:16:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:32,054 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-10-14 23:16:32,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-14 23:16:32,055 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 59 [2019-10-14 23:16:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:32,055 INFO L225 Difference]: With dead ends: 67 [2019-10-14 23:16:32,055 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:16:32,057 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=2966, Unknown=0, NotChecked=0, Total=3080 [2019-10-14 23:16:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:16:32,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-14 23:16:32,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 23:16:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-10-14 23:16:32,061 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2019-10-14 23:16:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:32,061 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-10-14 23:16:32,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-14 23:16:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-10-14 23:16:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 23:16:32,062 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:32,062 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:32,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:32,265 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:32,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1276579955, now seen corresponding path program 25 times [2019-10-14 23:16:32,266 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:32,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230115849] [2019-10-14 23:16:32,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:32,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:32,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:32,276 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:32,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999460688] [2019-10-14 23:16:32,277 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:32,364 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 111 conjunts are in the unsatisfiable core [2019-10-14 23:16:32,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:33,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:33,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230115849] [2019-10-14 23:16:33,862 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:33,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999460688] [2019-10-14 23:16:33,862 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:33,862 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-10-14 23:16:33,863 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347851600] [2019-10-14 23:16:33,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-10-14 23:16:33,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:33,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-10-14 23:16:33,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2019-10-14 23:16:33,864 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 56 states. [2019-10-14 23:16:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:35,721 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-10-14 23:16:35,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-14 23:16:35,721 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 61 [2019-10-14 23:16:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:35,722 INFO L225 Difference]: With dead ends: 69 [2019-10-14 23:16:35,723 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 23:16:35,725 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2019-10-14 23:16:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 23:16:35,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-14 23:16:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 23:16:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-10-14 23:16:35,729 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2019-10-14 23:16:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:35,729 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-10-14 23:16:35,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-10-14 23:16:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-10-14 23:16:35,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 23:16:35,730 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:35,730 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:35,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:35,932 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:35,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:35,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1592296501, now seen corresponding path program 26 times [2019-10-14 23:16:35,933 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:35,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728466742] [2019-10-14 23:16:35,933 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:35,933 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:35,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:35,945 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:35,946 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142070111] [2019-10-14 23:16:35,946 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:36,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:36,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:36,070 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 115 conjunts are in the unsatisfiable core [2019-10-14 23:16:36,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:38,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:38,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728466742] [2019-10-14 23:16:38,358 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:38,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142070111] [2019-10-14 23:16:38,358 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:38,358 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-10-14 23:16:38,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951687830] [2019-10-14 23:16:38,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-14 23:16:38,359 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:38,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-14 23:16:38,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2019-10-14 23:16:38,360 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 58 states.