java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/prodbin.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:28,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:28,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:28,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:28,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:28,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:28,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:28,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:28,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:28,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:28,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:28,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:28,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:28,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:28,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:28,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:28,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:28,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:28,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:28,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:28,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:28,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:28,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:28,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:28,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:28,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:28,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:28,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:28,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:28,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:28,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:28,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:28,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:28,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:28,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:28,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:28,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:17:28,938 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:28,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:28,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:28,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:28,941 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:28,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:28,942 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:28,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:28,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:28,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:28,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:28,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:28,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:28,943 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:28,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:28,947 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:28,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:28,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:28,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:28,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:28,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:28,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:28,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:28,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:28,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:28,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:28,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:28,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:28,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:29,219 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:29,231 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:29,234 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:29,236 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:29,236 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:29,237 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin.c [2019-10-14 23:17:29,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26732fd34/c25cbd8cce634f5b8a94f87ad638a8c0/FLAG069f255af [2019-10-14 23:17:29,722 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:29,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin.c [2019-10-14 23:17:29,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26732fd34/c25cbd8cce634f5b8a94f87ad638a8c0/FLAG069f255af [2019-10-14 23:17:30,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26732fd34/c25cbd8cce634f5b8a94f87ad638a8c0 [2019-10-14 23:17:30,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:30,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:30,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:30,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:30,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:30,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:30" (1/1) ... [2019-10-14 23:17:30,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f25ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:30, skipping insertion in model container [2019-10-14 23:17:30,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:30" (1/1) ... [2019-10-14 23:17:30,147 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:30,167 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:30,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:30,364 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:30,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:30,404 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:30,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:30 WrapperNode [2019-10-14 23:17:30,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:30,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:30,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:30,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:30,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:30" (1/1) ... [2019-10-14 23:17:30,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:30" (1/1) ... [2019-10-14 23:17:30,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:30" (1/1) ... [2019-10-14 23:17:30,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:30" (1/1) ... [2019-10-14 23:17:30,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:30" (1/1) ... [2019-10-14 23:17:30,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:30" (1/1) ... [2019-10-14 23:17:30,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:30" (1/1) ... [2019-10-14 23:17:30,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:30,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:30,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:30,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:30,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:30,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:30,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:30,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:30,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:30,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:30,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2019-10-14 23:17:30,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:30,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:30,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:30,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:30,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:30,796 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:30,796 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:17:30,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:30 BoogieIcfgContainer [2019-10-14 23:17:30,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:30,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:30,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:30,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:30,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:30" (1/3) ... [2019-10-14 23:17:30,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f6bc56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:30, skipping insertion in model container [2019-10-14 23:17:30,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:30" (2/3) ... [2019-10-14 23:17:30,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f6bc56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:30, skipping insertion in model container [2019-10-14 23:17:30,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:30" (3/3) ... [2019-10-14 23:17:30,806 INFO L109 eAbstractionObserver]: Analyzing ICFG prodbin.c [2019-10-14 23:17:30,816 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:30,823 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:30,834 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:30,858 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:30,858 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:30,858 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:30,858 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:30,858 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:30,859 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:30,859 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:30,859 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:30,876 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-14 23:17:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:30,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:30,882 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:30,884 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:30,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1560104174, now seen corresponding path program 1 times [2019-10-14 23:17:30,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:30,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957707613] [2019-10-14 23:17:30,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:30,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:30,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:31,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957707613] [2019-10-14 23:17:31,007 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:31,008 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:31,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324524055] [2019-10-14 23:17:31,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:31,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:31,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:31,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:31,029 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-10-14 23:17:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:31,052 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-10-14 23:17:31,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:31,053 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:31,062 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:17:31,062 INFO L226 Difference]: Without dead ends: 17 [2019-10-14 23:17:31,066 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-14 23:17:31,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-14 23:17:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-14 23:17:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-14 23:17:31,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2019-10-14 23:17:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:31,105 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-14 23:17:31,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-14 23:17:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:31,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:31,106 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:31,106 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:31,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1561891634, now seen corresponding path program 1 times [2019-10-14 23:17:31,109 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:31,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611864200] [2019-10-14 23:17:31,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:31,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:31,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:31,125 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:31,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124517069] [2019-10-14 23:17:31,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:31,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:17:31,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:31,353 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2019-10-14 23:17:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:31,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611864200] [2019-10-14 23:17:31,387 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:31,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124517069] [2019-10-14 23:17:31,388 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:31,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:31,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797850619] [2019-10-14 23:17:31,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:31,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:31,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:31,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:31,391 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2019-10-14 23:17:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:31,500 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-10-14 23:17:31,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:31,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:31,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:31,502 INFO L225 Difference]: With dead ends: 33 [2019-10-14 23:17:31,502 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:17:31,503 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:31,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:17:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-14 23:17:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:17:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 23:17:31,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2019-10-14 23:17:31,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:31,513 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 23:17:31,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 23:17:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:17:31,514 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:31,514 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:31,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:31,718 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:31,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1038075816, now seen corresponding path program 1 times [2019-10-14 23:17:31,721 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:31,721 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738345565] [2019-10-14 23:17:31,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:31,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:31,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:31,728 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:31,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902698707] [2019-10-14 23:17:31,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:31,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:31,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:31,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:31,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738345565] [2019-10-14 23:17:31,974 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:31,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902698707] [2019-10-14 23:17:31,974 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:31,974 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:31,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517963448] [2019-10-14 23:17:31,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:31,975 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:31,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:31,976 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2019-10-14 23:17:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:32,129 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-10-14 23:17:32,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:32,130 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-10-14 23:17:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:32,131 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:17:32,131 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 23:17:32,132 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 23:17:32,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2019-10-14 23:17:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:17:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-10-14 23:17:32,140 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2019-10-14 23:17:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:32,141 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-10-14 23:17:32,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-10-14 23:17:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:17:32,142 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:32,142 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:32,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:32,354 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:32,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:32,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1481884118, now seen corresponding path program 1 times [2019-10-14 23:17:32,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:32,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664433994] [2019-10-14 23:17:32,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:32,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:32,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:32,362 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:32,363 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009259041] [2019-10-14 23:17:32,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-14 23:17:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:32,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:17:32,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:32,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:32,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664433994] [2019-10-14 23:17:32,561 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:32,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009259041] [2019-10-14 23:17:32,561 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:32,561 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:32,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99864943] [2019-10-14 23:17:32,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:32,562 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:32,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:32,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:32,563 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2019-10-14 23:17:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:32,672 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2019-10-14 23:17:32,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:32,674 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-10-14 23:17:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:32,677 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:17:32,678 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:17:32,680 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:17:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-10-14 23:17:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:17:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-10-14 23:17:32,690 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 19 [2019-10-14 23:17:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:32,690 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-10-14 23:17:32,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:32,690 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-10-14 23:17:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 23:17:32,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:32,692 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:32,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:32,895 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:32,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:32,895 INFO L82 PathProgramCache]: Analyzing trace with hash 776909625, now seen corresponding path program 1 times [2019-10-14 23:17:32,895 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:32,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125764322] [2019-10-14 23:17:32,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:32,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:32,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:32,901 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:32,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45219385] [2019-10-14 23:17:32,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:32,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:17:32,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:17:33,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125764322] [2019-10-14 23:17:33,019 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:33,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45219385] [2019-10-14 23:17:33,020 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:33,020 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:33,020 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773702223] [2019-10-14 23:17:33,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:33,021 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:33,021 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 9 states. [2019-10-14 23:17:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:35,210 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-10-14 23:17:35,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:35,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2019-10-14 23:17:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:35,211 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:17:35,211 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:17:35,212 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:35,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:17:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2019-10-14 23:17:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:17:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-10-14 23:17:35,219 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2019-10-14 23:17:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:35,219 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-10-14 23:17:35,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-10-14 23:17:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:17:35,221 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:35,221 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:35,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:35,422 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:35,422 INFO L82 PathProgramCache]: Analyzing trace with hash -775079950, now seen corresponding path program 2 times [2019-10-14 23:17:35,422 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:35,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245236961] [2019-10-14 23:17:35,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:35,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:35,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:35,428 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:35,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658532887] [2019-10-14 23:17:35,428 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:35,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:35,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:35,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 23:17:35,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:35,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:35,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245236961] [2019-10-14 23:17:35,800 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:35,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658532887] [2019-10-14 23:17:35,801 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:35,802 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:35,802 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416060900] [2019-10-14 23:17:35,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:35,803 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:35,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:35,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:35,805 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2019-10-14 23:17:36,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:36,132 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2019-10-14 23:17:36,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:36,133 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-10-14 23:17:36,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:36,134 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:17:36,134 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:17:36,135 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:17:36,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2019-10-14 23:17:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:17:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-10-14 23:17:36,143 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 28 [2019-10-14 23:17:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:36,143 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-10-14 23:17:36,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-10-14 23:17:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:17:36,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:36,145 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:36,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:36,348 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:36,349 INFO L82 PathProgramCache]: Analyzing trace with hash 999927412, now seen corresponding path program 1 times [2019-10-14 23:17:36,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:36,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896950360] [2019-10-14 23:17:36,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:36,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:36,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:36,356 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:36,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557018328] [2019-10-14 23:17:36,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:36,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:17:36,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:36,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:36,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:36,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:36,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:36,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:36,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896950360] [2019-10-14 23:17:36,741 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:36,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557018328] [2019-10-14 23:17:36,743 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:36,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:17:36,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203113773] [2019-10-14 23:17:36,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:17:36,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:36,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:17:36,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:36,745 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 12 states. [2019-10-14 23:17:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:37,235 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2019-10-14 23:17:37,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:17:37,236 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-10-14 23:17:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:37,239 INFO L225 Difference]: With dead ends: 57 [2019-10-14 23:17:37,239 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:17:37,240 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:17:37,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:17:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-10-14 23:17:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 23:17:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2019-10-14 23:17:37,251 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 28 [2019-10-14 23:17:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:37,251 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2019-10-14 23:17:37,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:17:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2019-10-14 23:17:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:17:37,253 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:37,253 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:37,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:37,459 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:37,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:37,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1796148304, now seen corresponding path program 2 times [2019-10-14 23:17:37,460 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:37,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580774158] [2019-10-14 23:17:37,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:37,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:37,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:37,468 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:37,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103261627] [2019-10-14 23:17:37,469 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:37,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:37,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:37,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:17:37,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:37,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:37,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580774158] [2019-10-14 23:17:37,727 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:37,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103261627] [2019-10-14 23:17:37,727 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:37,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:37,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854041755] [2019-10-14 23:17:37,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:37,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:37,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:37,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:37,729 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 9 states. [2019-10-14 23:17:37,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:37,944 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2019-10-14 23:17:37,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:37,948 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-10-14 23:17:37,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:37,949 INFO L225 Difference]: With dead ends: 69 [2019-10-14 23:17:37,949 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 23:17:37,950 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 23:17:37,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2019-10-14 23:17:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:17:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-10-14 23:17:37,957 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 28 [2019-10-14 23:17:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:37,958 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-10-14 23:17:37,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-10-14 23:17:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:17:37,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:37,959 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:38,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:38,164 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:38,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:38,165 INFO L82 PathProgramCache]: Analyzing trace with hash 389577448, now seen corresponding path program 3 times [2019-10-14 23:17:38,165 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:38,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931374728] [2019-10-14 23:17:38,166 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:38,166 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:38,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:38,171 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:38,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185222875] [2019-10-14 23:17:38,171 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:38,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:17:38,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:38,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:38,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:38,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:38,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:38,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:17:38,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931374728] [2019-10-14 23:17:38,464 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:38,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185222875] [2019-10-14 23:17:38,465 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:38,465 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:17:38,465 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916812323] [2019-10-14 23:17:38,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:17:38,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:38,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:17:38,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2019-10-14 23:17:38,466 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2019-10-14 23:17:39,465 WARN L191 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-10-14 23:17:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:39,580 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2019-10-14 23:17:39,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:17:39,581 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-10-14 23:17:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:39,582 INFO L225 Difference]: With dead ends: 74 [2019-10-14 23:17:39,582 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:17:39,585 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=158, Unknown=1, NotChecked=0, Total=210 [2019-10-14 23:17:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:17:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 23:17:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:17:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-14 23:17:39,595 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2019-10-14 23:17:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:39,596 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-14 23:17:39,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:17:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-14 23:17:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:17:39,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:39,598 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:39,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:39,799 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:39,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:39,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1284065066, now seen corresponding path program 2 times [2019-10-14 23:17:39,800 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:39,800 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351138963] [2019-10-14 23:17:39,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:39,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:39,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:39,804 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:39,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113319554] [2019-10-14 23:17:39,805 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 23:17:39,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:39,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:39,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:17:39,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:40,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:17:40,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351138963] [2019-10-14 23:17:40,165 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:40,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113319554] [2019-10-14 23:17:40,165 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:40,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:17:40,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998545282] [2019-10-14 23:17:40,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:17:40,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:40,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:17:40,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:40,167 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 11 states. [2019-10-14 23:17:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:40,374 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-10-14 23:17:40,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:17:40,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-10-14 23:17:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:40,375 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:17:40,376 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:17:40,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:17:40,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-14 23:17:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:17:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-10-14 23:17:40,383 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 37 [2019-10-14 23:17:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:40,384 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-10-14 23:17:40,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:17:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-10-14 23:17:40,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:17:40,385 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:40,385 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:40,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:40,589 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:40,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:40,589 INFO L82 PathProgramCache]: Analyzing trace with hash 393904434, now seen corresponding path program 3 times [2019-10-14 23:17:40,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:40,590 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593431156] [2019-10-14 23:17:40,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:40,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:40,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:40,594 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:40,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298737532] [2019-10-14 23:17:40,595 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 23:17:40,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 23:17:40,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:40,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:40,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:40,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:40,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:41,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:41,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:43,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:43,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:46,305 WARN L191 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-10-14 23:17:46,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:46,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:50,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 37 refuted. 2 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:17:50,690 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593431156] [2019-10-14 23:17:50,691 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:50,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298737532] [2019-10-14 23:17:50,691 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:50,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 23:17:50,691 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614524910] [2019-10-14 23:17:50,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:17:50,692 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:50,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:17:50,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=141, Unknown=5, NotChecked=0, Total=182 [2019-10-14 23:17:50,693 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 14 states. [2019-10-14 23:18:02,825 WARN L191 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2019-10-14 23:18:06,111 WARN L191 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-10-14 23:18:10,081 WARN L191 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-10-14 23:18:13,446 WARN L191 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 49 DAG size of output: 46