/usr/bin/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-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:50:08,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:50:08,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:50:08,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:50:08,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:50:08,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:50:08,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:50:08,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:50:08,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:50:08,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:50:08,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:50:08,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:50:08,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:50:08,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:50:08,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:50:08,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:50:08,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:50:08,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:50:08,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:50:08,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:50:08,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:50:08,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:50:08,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:50:08,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:50:08,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:50:08,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:50:08,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:50:08,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:50:08,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:50:08,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:50:08,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:50:08,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:50:08,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:50:08,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:50:08,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:50:08,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:50:08,339 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 [2019-11-06 18:50:08,353 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:50:08,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:50:08,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:50:08,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:50:08,355 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:50:08,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:50:08,355 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:50:08,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:50:08,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:50:08,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:50:08,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:50:08,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:50:08,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:50:08,357 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:50:08,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:50:08,357 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:50:08,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:50:08,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:50:08,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:50:08,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:50:08,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:50:08,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:50:08,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:50:08,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:50:08,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:50:08,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:50:08,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:50:08,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:50:08,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:50:08,650 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:50:08,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:50:08,664 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:50:08,665 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:50:08,666 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:50:08,667 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-2-n-u.c [2019-11-06 18:50:08,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2db1d4a6b/2edf20bb8afe4ad8b1c9703a0d18d5b0/FLAG8076e5c6b [2019-11-06 18:50:09,157 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:50:09,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-2-n-u.c [2019-11-06 18:50:09,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2db1d4a6b/2edf20bb8afe4ad8b1c9703a0d18d5b0/FLAG8076e5c6b [2019-11-06 18:50:09,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2db1d4a6b/2edf20bb8afe4ad8b1c9703a0d18d5b0 [2019-11-06 18:50:09,558 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:50:09,559 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:50:09,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:09,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:50:09,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:50:09,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:09" (1/1) ... [2019-11-06 18:50:09,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6deb8361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:09, skipping insertion in model container [2019-11-06 18:50:09,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:09" (1/1) ... [2019-11-06 18:50:09,577 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:50:09,592 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:50:09,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:09,745 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:50:09,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:09,862 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:50:09,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:09 WrapperNode [2019-11-06 18:50:09,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:09,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:50:09,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:50:09,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:50:09,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:09" (1/1) ... [2019-11-06 18:50:09,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:09" (1/1) ... [2019-11-06 18:50:09,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:09" (1/1) ... [2019-11-06 18:50:09,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:09" (1/1) ... [2019-11-06 18:50:09,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:09" (1/1) ... [2019-11-06 18:50:09,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:09" (1/1) ... [2019-11-06 18:50:09,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:09" (1/1) ... [2019-11-06 18:50:09,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:50:09,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:50:09,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:50:09,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:50:09,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:09" (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 [2019-11-06 18:50:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:50:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:50:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:50:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:50:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:50:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:50:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:50:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:50:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:50:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:50:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:50:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:50:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:50:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:50:10,210 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:50:10,210 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 18:50:10,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:10 BoogieIcfgContainer [2019-11-06 18:50:10,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:50:10,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:50:10,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:50:10,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:50:10,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:50:09" (1/3) ... [2019-11-06 18:50:10,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a92c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:10, skipping insertion in model container [2019-11-06 18:50:10,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:09" (2/3) ... [2019-11-06 18:50:10,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a92c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:10, skipping insertion in model container [2019-11-06 18:50:10,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:10" (3/3) ... [2019-11-06 18:50:10,223 INFO L109 eAbstractionObserver]: Analyzing ICFG init-2-n-u.c [2019-11-06 18:50:10,237 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:50:10,246 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:50:10,260 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:50:10,285 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:50:10,286 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:50:10,286 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:50:10,286 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:50:10,286 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:50:10,287 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:50:10,287 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:50:10,287 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:50:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-06 18:50:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:50:10,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:10,314 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:10,316 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:10,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1832694891, now seen corresponding path program 1 times [2019-11-06 18:50:10,331 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:10,331 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684253929] [2019-11-06 18:50:10,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:10,421 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:10,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491754306] [2019-11-06 18:50:10,422 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 [2019-11-06 18:50:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:10,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:10,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:10,544 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684253929] [2019-11-06 18:50:10,544 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:10,545 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491754306] [2019-11-06 18:50:10,545 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:10,546 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:50:10,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460037105] [2019-11-06 18:50:10,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:50:10,552 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:10,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:50:10,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:50:10,570 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-11-06 18:50:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:10,655 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2019-11-06 18:50:10,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:50:10,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-06 18:50:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:10,670 INFO L225 Difference]: With dead ends: 49 [2019-11-06 18:50:10,670 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:50:10,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:50:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:50:10,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-06 18:50:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-06 18:50:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-06 18:50:10,739 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2019-11-06 18:50:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:10,740 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-06 18:50:10,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:50:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-06 18:50:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:50:10,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:10,743 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:10,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:10,947 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1374604441, now seen corresponding path program 1 times [2019-11-06 18:50:10,950 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:10,950 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351403465] [2019-11-06 18:50:10,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:10,961 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:10,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865788503] [2019-11-06 18:50:10,961 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 [2019-11-06 18:50:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:11,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:11,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:11,038 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351403465] [2019-11-06 18:50:11,038 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:11,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865788503] [2019-11-06 18:50:11,039 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:11,039 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:11,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92367201] [2019-11-06 18:50:11,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:11,042 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:11,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:11,043 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2019-11-06 18:50:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:11,086 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2019-11-06 18:50:11,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:11,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-06 18:50:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:11,089 INFO L225 Difference]: With dead ends: 42 [2019-11-06 18:50:11,090 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 18:50:11,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 18:50:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-06 18:50:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:50:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-06 18:50:11,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2019-11-06 18:50:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:11,103 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-06 18:50:11,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-06 18:50:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:50:11,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:11,105 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:11,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:11,309 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:11,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:11,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1853309542, now seen corresponding path program 1 times [2019-11-06 18:50:11,311 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:11,311 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84993519] [2019-11-06 18:50:11,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:11,320 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:11,321 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995209869] [2019-11-06 18:50:11,321 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 [2019-11-06 18:50:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:11,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:11,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:11,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84993519] [2019-11-06 18:50:11,438 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:11,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995209869] [2019-11-06 18:50:11,439 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:11,439 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:50:11,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488839795] [2019-11-06 18:50:11,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:50:11,440 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:11,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:50:11,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:11,442 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 5 states. [2019-11-06 18:50:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:11,531 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-11-06 18:50:11,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:50:11,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-06 18:50:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:11,533 INFO L225 Difference]: With dead ends: 48 [2019-11-06 18:50:11,533 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 18:50:11,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 18:50:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-11-06 18:50:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:50:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:50:11,550 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2019-11-06 18:50:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:11,550 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:50:11,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:50:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:50:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:50:11,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:11,551 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:11,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:11,755 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:11,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:11,756 INFO L82 PathProgramCache]: Analyzing trace with hash 486701511, now seen corresponding path program 2 times [2019-11-06 18:50:11,756 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:11,757 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320492593] [2019-11-06 18:50:11,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:11,769 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:11,769 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557825080] [2019-11-06 18:50:11,769 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 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 [2019-11-06 18:50:11,822 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:50:11,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:11,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:50:11,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:11,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320492593] [2019-11-06 18:50:11,887 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:11,887 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557825080] [2019-11-06 18:50:11,887 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:11,887 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 18:50:11,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168662111] [2019-11-06 18:50:11,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:50:11,888 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:11,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:50:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:50:11,889 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2019-11-06 18:50:11,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:11,964 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2019-11-06 18:50:11,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:50:11,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-06 18:50:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:11,966 INFO L225 Difference]: With dead ends: 56 [2019-11-06 18:50:11,966 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:50:11,966 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:50:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:50:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-11-06 18:50:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:50:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-11-06 18:50:11,975 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2019-11-06 18:50:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:11,975 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-11-06 18:50:11,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:50:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-11-06 18:50:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:50:11,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:11,976 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:12,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:12,180 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:12,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:12,181 INFO L82 PathProgramCache]: Analyzing trace with hash 12600122, now seen corresponding path program 3 times [2019-11-06 18:50:12,182 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:12,182 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518439354] [2019-11-06 18:50:12,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:12,200 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:12,200 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428823919] [2019-11-06 18:50:12,200 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 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 [2019-11-06 18:50:12,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:50:12,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:12,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:12,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:50:12,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518439354] [2019-11-06 18:50:12,274 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:12,274 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428823919] [2019-11-06 18:50:12,274 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:12,274 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-06 18:50:12,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716620209] [2019-11-06 18:50:12,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:12,275 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:12,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:12,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:12,277 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 4 states. [2019-11-06 18:50:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:12,330 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2019-11-06 18:50:12,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:12,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-06 18:50:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:12,335 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:50:12,335 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:50:12,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:50:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2019-11-06 18:50:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 18:50:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2019-11-06 18:50:12,353 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 20 [2019-11-06 18:50:12,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:12,353 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2019-11-06 18:50:12,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:12,353 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2019-11-06 18:50:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:50:12,354 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:12,354 INFO L410 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:12,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:12,559 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:12,560 INFO L82 PathProgramCache]: Analyzing trace with hash 554384073, now seen corresponding path program 4 times [2019-11-06 18:50:12,560 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:12,561 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297944037] [2019-11-06 18:50:12,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:12,569 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:12,569 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597114207] [2019-11-06 18:50:12,569 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 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 [2019-11-06 18:50:12,632 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:50:12,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:12,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:50:12,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:50:12,687 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297944037] [2019-11-06 18:50:12,688 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:12,688 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597114207] [2019-11-06 18:50:12,688 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:12,688 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 18:50:12,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711110457] [2019-11-06 18:50:12,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:50:12,689 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:12,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:50:12,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:50:12,690 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2019-11-06 18:50:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:12,761 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2019-11-06 18:50:12,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:50:12,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-06 18:50:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:12,762 INFO L225 Difference]: With dead ends: 73 [2019-11-06 18:50:12,763 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:50:12,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:50:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:50:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2019-11-06 18:50:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:50:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2019-11-06 18:50:12,773 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 26 [2019-11-06 18:50:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:12,774 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2019-11-06 18:50:12,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:50:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2019-11-06 18:50:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:50:12,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:12,776 INFO L410 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:12,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:12,981 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:12,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:12,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1435350805, now seen corresponding path program 5 times [2019-11-06 18:50:12,981 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:12,981 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385759473] [2019-11-06 18:50:12,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:12,993 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:12,994 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766752532] [2019-11-06 18:50:12,994 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 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 [2019-11-06 18:50:13,058 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 18:50:13,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:13,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:50:13,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:50:13,117 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385759473] [2019-11-06 18:50:13,117 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:13,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766752532] [2019-11-06 18:50:13,118 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:13,118 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 18:50:13,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024605031] [2019-11-06 18:50:13,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:50:13,119 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:13,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:50:13,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:50:13,120 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 8 states. [2019-11-06 18:50:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:13,214 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2019-11-06 18:50:13,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:50:13,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-11-06 18:50:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:13,216 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:50:13,216 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:50:13,217 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:50:13,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:50:13,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-06 18:50:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:50:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-11-06 18:50:13,226 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 28 [2019-11-06 18:50:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:13,226 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-11-06 18:50:13,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:50:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-11-06 18:50:13,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:50:13,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:13,227 INFO L410 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:13,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:13,431 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:13,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1344459191, now seen corresponding path program 6 times [2019-11-06 18:50:13,432 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:13,432 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629856912] [2019-11-06 18:50:13,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:13,440 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:13,440 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812794354] [2019-11-06 18:50:13,440 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 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 [2019-11-06 18:50:13,484 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-06 18:50:13,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:13,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:50:13,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:50:13,532 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629856912] [2019-11-06 18:50:13,532 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:13,532 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812794354] [2019-11-06 18:50:13,533 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:13,533 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:50:13,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854394151] [2019-11-06 18:50:13,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:50:13,534 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:13,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:50:13,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:13,535 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 5 states. [2019-11-06 18:50:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:13,580 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2019-11-06 18:50:13,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:50:13,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-11-06 18:50:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:13,581 INFO L225 Difference]: With dead ends: 88 [2019-11-06 18:50:13,582 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:50:13,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:50:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2019-11-06 18:50:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:50:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2019-11-06 18:50:13,593 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 30 [2019-11-06 18:50:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:13,594 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2019-11-06 18:50:13,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:50:13,594 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2019-11-06 18:50:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:50:13,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:13,595 INFO L410 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:13,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:13,799 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:13,800 INFO L82 PathProgramCache]: Analyzing trace with hash 245144760, now seen corresponding path program 7 times [2019-11-06 18:50:13,800 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:13,801 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143506204] [2019-11-06 18:50:13,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:13,812 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:13,812 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814967122] [2019-11-06 18:50:13,813 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 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 [2019-11-06 18:50:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:13,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:50:13,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:50:13,989 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143506204] [2019-11-06 18:50:13,989 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:13,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814967122] [2019-11-06 18:50:13,990 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:13,990 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 18:50:13,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605490675] [2019-11-06 18:50:13,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:50:13,991 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:13,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:50:13,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:50:13,992 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 9 states. [2019-11-06 18:50:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:14,077 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2019-11-06 18:50:14,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:50:14,078 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-11-06 18:50:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:14,078 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:50:14,079 INFO L226 Difference]: Without dead ends: 65 [2019-11-06 18:50:14,079 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:50:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-06 18:50:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2019-11-06 18:50:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 18:50:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-11-06 18:50:14,089 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 38 [2019-11-06 18:50:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:14,090 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-11-06 18:50:14,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:50:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-11-06 18:50:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:50:14,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:14,091 INFO L410 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:14,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:14,295 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:14,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:14,295 INFO L82 PathProgramCache]: Analyzing trace with hash -586510585, now seen corresponding path program 8 times [2019-11-06 18:50:14,296 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:14,296 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470363841] [2019-11-06 18:50:14,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:14,303 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:14,304 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627617468] [2019-11-06 18:50:14,304 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 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 [2019-11-06 18:50:14,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:50:14,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:14,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:50:14,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-06 18:50:14,456 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470363841] [2019-11-06 18:50:14,456 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:14,456 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627617468] [2019-11-06 18:50:14,457 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:14,457 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 18:50:14,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989096364] [2019-11-06 18:50:14,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:50:14,458 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:14,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:50:14,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:50:14,459 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 10 states. [2019-11-06 18:50:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:14,560 INFO L93 Difference]: Finished difference Result 119 states and 144 transitions. [2019-11-06 18:50:14,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:50:14,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-06 18:50:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:14,561 INFO L225 Difference]: With dead ends: 119 [2019-11-06 18:50:14,561 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:50:14,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:50:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:50:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2019-11-06 18:50:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-06 18:50:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2019-11-06 18:50:14,572 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 41 [2019-11-06 18:50:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:14,573 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2019-11-06 18:50:14,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:50:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2019-11-06 18:50:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 18:50:14,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:14,574 INFO L410 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:14,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:14,786 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:14,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:14,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1310345640, now seen corresponding path program 9 times [2019-11-06 18:50:14,787 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:14,787 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413209469] [2019-11-06 18:50:14,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:14,795 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:14,795 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594262325] [2019-11-06 18:50:14,795 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 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 [2019-11-06 18:50:14,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 18:50:14,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:14,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:50:14,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 133 proven. 28 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-11-06 18:50:15,051 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413209469] [2019-11-06 18:50:15,052 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:15,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594262325] [2019-11-06 18:50:15,052 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:15,052 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 18:50:15,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385290058] [2019-11-06 18:50:15,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:50:15,053 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:15,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:50:15,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:50:15,054 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 11 states. [2019-11-06 18:50:15,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:15,152 INFO L93 Difference]: Finished difference Result 130 states and 157 transitions. [2019-11-06 18:50:15,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:50:15,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-11-06 18:50:15,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:15,154 INFO L225 Difference]: With dead ends: 130 [2019-11-06 18:50:15,154 INFO L226 Difference]: Without dead ends: 77 [2019-11-06 18:50:15,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:50:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-06 18:50:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2019-11-06 18:50:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-06 18:50:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2019-11-06 18:50:15,165 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 44 [2019-11-06 18:50:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:15,166 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2019-11-06 18:50:15,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:50:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2019-11-06 18:50:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:50:15,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:15,168 INFO L410 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:15,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:15,373 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:15,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:15,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1035660697, now seen corresponding path program 10 times [2019-11-06 18:50:15,374 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:15,375 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700897511] [2019-11-06 18:50:15,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:15,382 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:15,382 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949409093] [2019-11-06 18:50:15,382 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 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