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/array-multidimensional/init-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:48:30,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:48:30,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:48:30,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:48:30,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:48:30,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:48:30,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:48:30,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:48:30,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:48:30,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:48:30,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:48:30,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:48:30,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:48:30,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:48:30,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:48:30,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:48:30,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:48:30,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:48:30,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:48:30,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:48:30,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:48:30,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:48:30,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:48:30,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:48:30,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:48:30,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:48:30,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:48:30,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:48:30,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:48:30,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:48:30,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:48:30,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:48:30,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:48:30,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:48:30,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:48:30,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:48:30,882 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 21:48:30,904 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:48:30,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:48:30,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:48:30,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:48:30,907 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:48:30,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:48:30,908 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:48:30,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:48:30,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:48:30,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:48:30,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:48:30,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:48:30,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:48:30,910 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:48:30,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:48:30,911 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:48:30,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:48:30,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:48:30,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:48:30,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:48:30,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:48:30,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:48:30,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:48:30,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:48:30,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:48:30,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:48:30,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:48:30,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:48:30,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:48:31,183 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:48:31,203 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:48:31,207 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:48:31,209 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:48:31,209 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:48:31,210 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-10-14 21:48:31,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e83a6e4bf/da4fbfdc91f144fabfa196b9fca0ab66/FLAGd4e064dd1 [2019-10-14 21:48:31,758 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:48:31,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-10-14 21:48:31,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e83a6e4bf/da4fbfdc91f144fabfa196b9fca0ab66/FLAGd4e064dd1 [2019-10-14 21:48:32,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e83a6e4bf/da4fbfdc91f144fabfa196b9fca0ab66 [2019-10-14 21:48:32,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:48:32,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:48:32,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:32,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:48:32,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:48:32,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:32" (1/1) ... [2019-10-14 21:48:32,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4020d0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:32, skipping insertion in model container [2019-10-14 21:48:32,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:32" (1/1) ... [2019-10-14 21:48:32,159 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:48:32,176 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:48:32,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:32,382 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:48:32,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:32,426 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:48:32,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:32 WrapperNode [2019-10-14 21:48:32,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:32,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:48:32,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:48:32,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:48:32,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:32" (1/1) ... [2019-10-14 21:48:32,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:32" (1/1) ... [2019-10-14 21:48:32,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:32" (1/1) ... [2019-10-14 21:48:32,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:32" (1/1) ... [2019-10-14 21:48:32,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:32" (1/1) ... [2019-10-14 21:48:32,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:32" (1/1) ... [2019-10-14 21:48:32,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:32" (1/1) ... [2019-10-14 21:48:32,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:48:32,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:48:32,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:48:32,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:48:32,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:32" (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 21:48:32,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:48:32,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:48:32,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:48:32,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:48:32,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:48:32,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:48:32,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:48:32,593 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:48:32,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:48:32,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:48:32,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:48:32,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:48:32,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:48:32,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:48:32,837 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:48:32,837 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 21:48:32,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:32 BoogieIcfgContainer [2019-10-14 21:48:32,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:48:32,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:48:32,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:48:32,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:48:32,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:48:32" (1/3) ... [2019-10-14 21:48:32,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3641dc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:32, skipping insertion in model container [2019-10-14 21:48:32,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:32" (2/3) ... [2019-10-14 21:48:32,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3641dc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:32, skipping insertion in model container [2019-10-14 21:48:32,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:32" (3/3) ... [2019-10-14 21:48:32,850 INFO L109 eAbstractionObserver]: Analyzing ICFG init-3-u.c [2019-10-14 21:48:32,862 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:48:32,871 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:48:32,884 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:48:32,914 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:48:32,914 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:48:32,914 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:48:32,914 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:48:32,914 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:48:32,915 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:48:32,915 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:48:32,915 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:48:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-10-14 21:48:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:48:32,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:32,943 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:32,946 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:32,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1375180307, now seen corresponding path program 1 times [2019-10-14 21:48:32,961 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:32,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629106800] [2019-10-14 21:48:32,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:32,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:32,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:33,040 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:33,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166522326] [2019-10-14 21:48:33,041 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 21:48:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:33,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-14 21:48:33,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:33,159 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 21:48:33,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629106800] [2019-10-14 21:48:33,161 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:33,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166522326] [2019-10-14 21:48:33,163 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:33,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 21:48:33,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455053629] [2019-10-14 21:48:33,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 21:48:33,169 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:33,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 21:48:33,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 21:48:33,189 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-10-14 21:48:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:33,215 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-10-14 21:48:33,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 21:48:33,217 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-10-14 21:48:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:33,227 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:48:33,227 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 21:48:33,231 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 21:48:33,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 21:48:33,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-14 21:48:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:48:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-10-14 21:48:33,275 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 15 [2019-10-14 21:48:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:33,276 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-10-14 21:48:33,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 21:48:33,276 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-10-14 21:48:33,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:48:33,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:33,277 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:33,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:33,482 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:33,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1308846031, now seen corresponding path program 1 times [2019-10-14 21:48:33,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:33,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044861134] [2019-10-14 21:48:33,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:33,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:33,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:33,518 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:33,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175240229] [2019-10-14 21:48:33,519 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 21:48:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:33,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:33,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:33,623 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 21:48:33,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044861134] [2019-10-14 21:48:33,624 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:33,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175240229] [2019-10-14 21:48:33,624 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:33,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:48:33,625 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058006162] [2019-10-14 21:48:33,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:48:33,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:33,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:48:33,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:33,628 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 3 states. [2019-10-14 21:48:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:33,697 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2019-10-14 21:48:33,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:48:33,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:48:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:33,700 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:48:33,700 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:48:33,701 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 21:48:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:48:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-10-14 21:48:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:48:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-14 21:48:33,709 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2019-10-14 21:48:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:33,709 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-14 21:48:33,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:48:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-14 21:48:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:48:33,710 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:33,711 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:33,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:33,914 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1886649102, now seen corresponding path program 1 times [2019-10-14 21:48:33,915 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:33,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130093402] [2019-10-14 21:48:33,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:33,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:33,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:33,926 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:33,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700289538] [2019-10-14 21:48:33,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:33,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:33,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:34,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130093402] [2019-10-14 21:48:34,018 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:34,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700289538] [2019-10-14 21:48:34,019 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:34,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:34,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874876064] [2019-10-14 21:48:34,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:34,020 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:34,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:34,021 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-14 21:48:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:34,097 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2019-10-14 21:48:34,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:34,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 21:48:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:34,101 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:48:34,101 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:48:34,102 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:34,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:48:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2019-10-14 21:48:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:48:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 21:48:34,114 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-10-14 21:48:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:34,115 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 21:48:34,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 21:48:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:48:34,116 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:34,116 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:34,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:34,328 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:34,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:34,329 INFO L82 PathProgramCache]: Analyzing trace with hash -464275123, now seen corresponding path program 1 times [2019-10-14 21:48:34,329 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:34,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078629439] [2019-10-14 21:48:34,329 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:34,329 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:34,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:34,340 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:34,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789555517] [2019-10-14 21:48:34,341 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 21:48:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:34,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:34,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:34,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078629439] [2019-10-14 21:48:34,425 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:34,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789555517] [2019-10-14 21:48:34,425 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:34,425 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:34,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478176943] [2019-10-14 21:48:34,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:34,427 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:34,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:34,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:34,427 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-10-14 21:48:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:34,507 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-10-14 21:48:34,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:34,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:48:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:34,509 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:48:34,509 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:48:34,510 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:48:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-14 21:48:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:48:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 21:48:34,517 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 21 [2019-10-14 21:48:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:34,517 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 21:48:34,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 21:48:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:48:34,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:34,519 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:34,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:34,730 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash -727027933, now seen corresponding path program 1 times [2019-10-14 21:48:34,731 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:34,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251033266] [2019-10-14 21:48:34,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:34,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:34,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:34,741 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:34,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219490437] [2019-10-14 21:48:34,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:48:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:34,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:34,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:34,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251033266] [2019-10-14 21:48:34,827 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:34,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219490437] [2019-10-14 21:48:34,827 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:34,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:34,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929119214] [2019-10-14 21:48:34,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:34,829 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:34,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:34,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:34,829 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-10-14 21:48:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:34,919 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-10-14 21:48:34,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:34,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-14 21:48:34,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:34,921 INFO L225 Difference]: With dead ends: 60 [2019-10-14 21:48:34,921 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:48:34,922 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:34,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:48:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-10-14 21:48:34,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:48:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-14 21:48:34,929 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2019-10-14 21:48:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:34,930 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-14 21:48:34,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-14 21:48:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:48:34,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:34,931 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:35,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:35,137 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash -282430451, now seen corresponding path program 2 times [2019-10-14 21:48:35,138 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:35,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918570051] [2019-10-14 21:48:35,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:35,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:35,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:35,146 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:35,146 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996969006] [2019-10-14 21:48:35,146 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 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 21:48:35,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:35,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:35,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:35,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:35,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918570051] [2019-10-14 21:48:35,241 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:35,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996969006] [2019-10-14 21:48:35,241 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:35,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:48:35,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308809118] [2019-10-14 21:48:35,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:35,242 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:35,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:35,243 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2019-10-14 21:48:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:35,326 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2019-10-14 21:48:35,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:35,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-14 21:48:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:35,329 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:48:35,330 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:48:35,331 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:48:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-10-14 21:48:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:48:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-10-14 21:48:35,346 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2019-10-14 21:48:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:35,346 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-10-14 21:48:35,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-10-14 21:48:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:48:35,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:35,349 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:35,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:35,553 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:35,553 INFO L82 PathProgramCache]: Analyzing trace with hash 615189603, now seen corresponding path program 3 times [2019-10-14 21:48:35,554 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:35,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297375925] [2019-10-14 21:48:35,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:35,555 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:35,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:35,561 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:35,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792955488] [2019-10-14 21:48:35,562 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:35,597 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:35,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:35,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:35,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:48:35,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297375925] [2019-10-14 21:48:35,643 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:35,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792955488] [2019-10-14 21:48:35,644 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:35,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 21:48:35,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548364724] [2019-10-14 21:48:35,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:35,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:35,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:35,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:35,645 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 4 states. [2019-10-14 21:48:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:35,724 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2019-10-14 21:48:35,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:35,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-10-14 21:48:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:35,726 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:48:35,726 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:48:35,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:48:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2019-10-14 21:48:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:48:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-10-14 21:48:35,737 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 24 [2019-10-14 21:48:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:35,737 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-10-14 21:48:35,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-10-14 21:48:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:48:35,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:35,741 INFO L380 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:35,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:35,944 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:35,944 INFO L82 PathProgramCache]: Analyzing trace with hash 550587983, now seen corresponding path program 4 times [2019-10-14 21:48:35,945 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:35,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14275149] [2019-10-14 21:48:35,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:35,946 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:35,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:35,953 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:35,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083202337] [2019-10-14 21:48:35,953 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:35,996 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:35,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:35,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:48:35,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:48:36,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14275149] [2019-10-14 21:48:36,062 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:36,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083202337] [2019-10-14 21:48:36,062 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:36,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 21:48:36,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179313808] [2019-10-14 21:48:36,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:48:36,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:36,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:48:36,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:48:36,064 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 8 states. [2019-10-14 21:48:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:36,258 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2019-10-14 21:48:36,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:48:36,259 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-10-14 21:48:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:36,260 INFO L225 Difference]: With dead ends: 126 [2019-10-14 21:48:36,260 INFO L226 Difference]: Without dead ends: 93 [2019-10-14 21:48:36,261 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:48:36,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-14 21:48:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2019-10-14 21:48:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:48:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2019-10-14 21:48:36,279 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 33 [2019-10-14 21:48:36,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:36,279 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2019-10-14 21:48:36,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:48:36,280 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2019-10-14 21:48:36,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:48:36,281 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:36,281 INFO L380 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:36,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:36,482 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:36,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:36,483 INFO L82 PathProgramCache]: Analyzing trace with hash -98839249, now seen corresponding path program 5 times [2019-10-14 21:48:36,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:36,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122050819] [2019-10-14 21:48:36,484 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:36,484 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:36,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:36,492 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:36,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344398315] [2019-10-14 21:48:36,493 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:37,140 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-14 21:48:37,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:37,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:48:37,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:48:37,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122050819] [2019-10-14 21:48:37,250 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:37,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344398315] [2019-10-14 21:48:37,251 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:37,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:48:37,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85692207] [2019-10-14 21:48:37,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:48:37,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:37,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:48:37,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:48:37,253 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 9 states. [2019-10-14 21:48:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:37,595 INFO L93 Difference]: Finished difference Result 168 states and 210 transitions. [2019-10-14 21:48:37,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:48:37,595 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-10-14 21:48:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:37,596 INFO L225 Difference]: With dead ends: 168 [2019-10-14 21:48:37,597 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 21:48:37,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:48:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 21:48:37,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2019-10-14 21:48:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 21:48:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2019-10-14 21:48:37,615 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 45 [2019-10-14 21:48:37,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:37,616 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2019-10-14 21:48:37,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:48:37,616 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2019-10-14 21:48:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:48:37,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:37,618 INFO L380 BasicCegarLoop]: trace histogram [18, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:37,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:37,822 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:37,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1998480783, now seen corresponding path program 6 times [2019-10-14 21:48:37,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:37,824 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390225622] [2019-10-14 21:48:37,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:37,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:37,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:37,831 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:37,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170497949] [2019-10-14 21:48:37,832 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:37,893 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-14 21:48:37,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:37,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:48:37,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 201 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-14 21:48:37,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390225622] [2019-10-14 21:48:37,948 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:37,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170497949] [2019-10-14 21:48:37,948 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:37,949 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:48:37,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233588235] [2019-10-14 21:48:37,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:48:37,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:48:37,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:37,950 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 7 states. [2019-10-14 21:48:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:38,040 INFO L93 Difference]: Finished difference Result 200 states and 256 transitions. [2019-10-14 21:48:38,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:48:38,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2019-10-14 21:48:38,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:38,042 INFO L225 Difference]: With dead ends: 200 [2019-10-14 21:48:38,042 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 21:48:38,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 21:48:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2019-10-14 21:48:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-14 21:48:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2019-10-14 21:48:38,062 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 57 [2019-10-14 21:48:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:38,063 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2019-10-14 21:48:38,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:48:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2019-10-14 21:48:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:48:38,065 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:38,065 INFO L380 BasicCegarLoop]: trace histogram [24, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:38,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:38,270 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:38,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:38,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1557287797, now seen corresponding path program 7 times [2019-10-14 21:48:38,270 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:38,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605771838] [2019-10-14 21:48:38,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:38,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:38,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:38,277 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:38,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768513745] [2019-10-14 21:48:38,278 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:38,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:48:38,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-10-14 21:48:38,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605771838] [2019-10-14 21:48:38,405 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:38,406 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768513745] [2019-10-14 21:48:38,415 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:38,415 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 21:48:38,416 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103397289] [2019-10-14 21:48:38,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:48:38,417 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:38,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:48:38,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:48:38,418 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand 8 states. [2019-10-14 21:48:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:38,521 INFO L93 Difference]: Finished difference Result 229 states and 291 transitions. [2019-10-14 21:48:38,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:48:38,521 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2019-10-14 21:48:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:38,523 INFO L225 Difference]: With dead ends: 229 [2019-10-14 21:48:38,523 INFO L226 Difference]: Without dead ends: 132 [2019-10-14 21:48:38,525 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:48:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-14 21:48:38,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2019-10-14 21:48:38,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 21:48:38,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 152 transitions. [2019-10-14 21:48:38,558 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 152 transitions. Word has length 63 [2019-10-14 21:48:38,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:38,559 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 152 transitions. [2019-10-14 21:48:38,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:48:38,559 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 152 transitions. [2019-10-14 21:48:38,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 21:48:38,560 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:38,560 INFO L380 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:38,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:38,772 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:38,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1777595919, now seen corresponding path program 8 times [2019-10-14 21:48:38,773 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:38,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162271973] [2019-10-14 21:48:38,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:38,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:38,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:38,780 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:38,780 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962084151] [2019-10-14 21:48:38,780 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:38,838 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:38,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:38,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:48:38,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2019-10-14 21:48:38,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162271973] [2019-10-14 21:48:38,908 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:38,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962084151] [2019-10-14 21:48:38,908 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:38,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:48:38,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480634240] [2019-10-14 21:48:38,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:48:38,910 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:38,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:48:38,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:48:38,910 INFO L87 Difference]: Start difference. First operand 125 states and 152 transitions. Second operand 9 states. [2019-10-14 21:48:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:39,018 INFO L93 Difference]: Finished difference Result 258 states and 326 transitions. [2019-10-14 21:48:39,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:48:39,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2019-10-14 21:48:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:39,020 INFO L225 Difference]: With dead ends: 258 [2019-10-14 21:48:39,020 INFO L226 Difference]: Without dead ends: 147 [2019-10-14 21:48:39,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:48:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-10-14 21:48:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2019-10-14 21:48:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-10-14 21:48:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 170 transitions. [2019-10-14 21:48:39,038 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 170 transitions. Word has length 69 [2019-10-14 21:48:39,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:39,038 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 170 transitions. [2019-10-14 21:48:39,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:48:39,039 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 170 transitions. [2019-10-14 21:48:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-14 21:48:39,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:39,040 INFO L380 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:39,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:39,246 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:39,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:39,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1500778997, now seen corresponding path program 9 times [2019-10-14 21:48:39,246 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:39,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206409083] [2019-10-14 21:48:39,247 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:39,247 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:39,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:39,253 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:39,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047748679] [2019-10-14 21:48:39,254 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:39,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 21:48:39,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:39,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:48:39,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 260 proven. 21 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2019-10-14 21:48:39,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206409083] [2019-10-14 21:48:39,438 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:39,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047748679] [2019-10-14 21:48:39,438 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:39,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 21:48:39,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984926070] [2019-10-14 21:48:39,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:48:39,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:39,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:48:39,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:48:39,441 INFO L87 Difference]: Start difference. First operand 140 states and 170 transitions. Second operand 10 states. [2019-10-14 21:48:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:39,559 INFO L93 Difference]: Finished difference Result 287 states and 361 transitions. [2019-10-14 21:48:39,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:48:39,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2019-10-14 21:48:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:39,562 INFO L225 Difference]: With dead ends: 287 [2019-10-14 21:48:39,562 INFO L226 Difference]: Without dead ends: 162 [2019-10-14 21:48:39,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:48:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-10-14 21:48:39,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2019-10-14 21:48:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-10-14 21:48:39,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 188 transitions. [2019-10-14 21:48:39,585 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 188 transitions. Word has length 75 [2019-10-14 21:48:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:39,585 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 188 transitions. [2019-10-14 21:48:39,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:48:39,585 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 188 transitions. [2019-10-14 21:48:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:48:39,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:39,589 INFO L380 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:39,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:39,793 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:39,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1294358897, now seen corresponding path program 10 times [2019-10-14 21:48:39,794 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:39,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718260108] [2019-10-14 21:48:39,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:39,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:39,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:39,802 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:39,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204145713] [2019-10-14 21:48:39,802 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:39,866 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:39,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:39,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:48:39,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 624 proven. 208 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-10-14 21:48:39,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718260108] [2019-10-14 21:48:39,998 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:39,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204145713] [2019-10-14 21:48:39,998 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:39,998 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 21:48:39,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473003015] [2019-10-14 21:48:39,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:48:39,999 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:39,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:48:40,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:48:40,000 INFO L87 Difference]: Start difference. First operand 155 states and 188 transitions. Second operand 14 states. [2019-10-14 21:48:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:40,308 INFO L93 Difference]: Finished difference Result 358 states and 443 transitions. [2019-10-14 21:48:40,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:48:40,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2019-10-14 21:48:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:40,310 INFO L225 Difference]: With dead ends: 358 [2019-10-14 21:48:40,311 INFO L226 Difference]: Without dead ends: 241 [2019-10-14 21:48:40,312 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:48:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-10-14 21:48:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 199. [2019-10-14 21:48:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-10-14 21:48:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 242 transitions. [2019-10-14 21:48:40,333 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 242 transitions. Word has length 81 [2019-10-14 21:48:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:40,334 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 242 transitions. [2019-10-14 21:48:40,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:48:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 242 transitions. [2019-10-14 21:48:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-14 21:48:40,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:40,335 INFO L380 BasicCegarLoop]: trace histogram [56, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:40,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:40,547 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:40,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:40,548 INFO L82 PathProgramCache]: Analyzing trace with hash -552358545, now seen corresponding path program 11 times [2019-10-14 21:48:40,548 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:40,548 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124399997] [2019-10-14 21:48:40,549 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:40,549 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:40,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:40,556 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:40,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716270153] [2019-10-14 21:48:40,557 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true