/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-multidimensional/min-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:33:06,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:33:06,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:33:06,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:33:06,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:33:06,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:33:06,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:33:06,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:33:06,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:33:06,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:33:06,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:33:06,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:33:06,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:33:06,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:33:06,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:33:06,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:33:06,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:33:06,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:33:06,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:33:06,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:33:06,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:33:06,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:33:06,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:33:06,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:33:06,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:33:06,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:33:06,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:33:06,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:33:06,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:33:06,316 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:33:06,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:33:06,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:33:06,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:33:06,322 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:33:06,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:33:06,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:33:06,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:33:06,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:33:06,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:33:06,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:33:06,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:33:06,325 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:33:06,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:33:06,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:33:06,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:33:06,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:33:06,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:33:06,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:33:06,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:33:06,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:33:06,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:33:06,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:33:06,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:33:06,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:33:06,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:33:06,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:33:06,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:33:06,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:33:06,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:33:06,780 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:33:06,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2020-12-21 22:33:06,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ea287fb/79503fc9ab67490c8dd3eb1c95b62452/FLAGc5e423a36 [2020-12-21 22:33:07,489 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:33:07,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2020-12-21 22:33:07,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ea287fb/79503fc9ab67490c8dd3eb1c95b62452/FLAGc5e423a36 [2020-12-21 22:33:07,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ea287fb/79503fc9ab67490c8dd3eb1c95b62452 [2020-12-21 22:33:07,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:33:07,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:33:07,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:33:07,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:33:07,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:33:07,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:33:07" (1/1) ... [2020-12-21 22:33:07,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d8008e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:07, skipping insertion in model container [2020-12-21 22:33:07,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:33:07" (1/1) ... [2020-12-21 22:33:07,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:33:07,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:33:08,061 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2020-12-21 22:33:08,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:33:08,099 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:33:08,114 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2020-12-21 22:33:08,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:33:08,170 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:33:08,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08 WrapperNode [2020-12-21 22:33:08,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:33:08,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:33:08,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:33:08,175 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:33:08,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08" (1/1) ... [2020-12-21 22:33:08,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08" (1/1) ... [2020-12-21 22:33:08,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:33:08,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:33:08,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:33:08,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:33:08,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08" (1/1) ... [2020-12-21 22:33:08,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08" (1/1) ... [2020-12-21 22:33:08,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08" (1/1) ... [2020-12-21 22:33:08,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08" (1/1) ... [2020-12-21 22:33:08,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08" (1/1) ... [2020-12-21 22:33:08,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08" (1/1) ... [2020-12-21 22:33:08,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08" (1/1) ... [2020-12-21 22:33:08,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:33:08,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:33:08,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:33:08,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:33:08,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08" (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 [2020-12-21 22:33:08,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:33:08,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:33:08,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:33:08,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:33:08,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:33:08,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:33:08,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:33:08,987 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:33:08,987 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-21 22:33:08,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:33:08 BoogieIcfgContainer [2020-12-21 22:33:08,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:33:08,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:33:08,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:33:08,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:33:08,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:33:07" (1/3) ... [2020-12-21 22:33:08,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e9e752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:33:08, skipping insertion in model container [2020-12-21 22:33:08,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:08" (2/3) ... [2020-12-21 22:33:08,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e9e752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:33:08, skipping insertion in model container [2020-12-21 22:33:08,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:33:08" (3/3) ... [2020-12-21 22:33:09,000 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2020-12-21 22:33:09,008 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:33:09,014 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:33:09,035 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:33:09,065 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:33:09,065 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:33:09,066 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:33:09,066 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:33:09,066 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:33:09,066 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:33:09,066 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:33:09,066 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:33:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-21 22:33:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:33:09,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:09,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:09,092 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:09,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:09,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2020-12-21 22:33:09,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:09,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413032680] [2020-12-21 22:33:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:09,230 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:09,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414331550] [2020-12-21 22:33:09,231 INFO L95 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 [2020-12-21 22:33:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:33:09,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:33:09,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:33:09,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413032680] [2020-12-21 22:33:09,410 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:09,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414331550] [2020-12-21 22:33:09,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:33:09,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:33:09,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705778359] [2020-12-21 22:33:09,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:33:09,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:09,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:33:09,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:33:09,438 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-12-21 22:33:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:09,460 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2020-12-21 22:33:09,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:33:09,462 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:33:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:09,472 INFO L225 Difference]: With dead ends: 56 [2020-12-21 22:33:09,472 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 22:33:09,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:33:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 22:33:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-21 22:33:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 22:33:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2020-12-21 22:33:09,519 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2020-12-21 22:33:09,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:09,520 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-12-21 22:33:09,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:33:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2020-12-21 22:33:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:33:09,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:09,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:09,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:33:09,737 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:09,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:09,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2020-12-21 22:33:09,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:09,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559753794] [2020-12-21 22:33:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:09,752 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:09,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599368997] [2020-12-21 22:33:09,753 INFO L95 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 [2020-12-21 22:33:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:33:09,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:33:09,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:33:09,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559753794] [2020-12-21 22:33:09,950 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:09,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599368997] [2020-12-21 22:33:09,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:33:09,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:33:09,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384986976] [2020-12-21 22:33:09,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:33:09,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:09,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:33:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:33:09,958 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 3 states. [2020-12-21 22:33:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:10,041 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2020-12-21 22:33:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:33:10,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 22:33:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:10,043 INFO L225 Difference]: With dead ends: 48 [2020-12-21 22:33:10,044 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 22:33:10,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:33:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 22:33:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-12-21 22:33:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:33:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2020-12-21 22:33:10,051 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2020-12-21 22:33:10,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:10,052 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2020-12-21 22:33:10,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:33:10,052 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2020-12-21 22:33:10,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:33:10,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:10,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:10,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:10,268 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:10,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2020-12-21 22:33:10,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:10,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045340875] [2020-12-21 22:33:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:10,286 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:10,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473348792] [2020-12-21 22:33:10,286 INFO L95 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 [2020-12-21 22:33:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:33:10,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:33:10,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:33:10,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045340875] [2020-12-21 22:33:10,388 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:10,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473348792] [2020-12-21 22:33:10,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:33:10,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:33:10,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619377678] [2020-12-21 22:33:10,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:33:10,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:10,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:33:10,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:33:10,391 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 4 states. [2020-12-21 22:33:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:10,484 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2020-12-21 22:33:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:33:10,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-21 22:33:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:10,486 INFO L225 Difference]: With dead ends: 67 [2020-12-21 22:33:10,486 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 22:33:10,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:33:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 22:33:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2020-12-21 22:33:10,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 22:33:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-12-21 22:33:10,494 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2020-12-21 22:33:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:10,495 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-12-21 22:33:10,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:33:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-12-21 22:33:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:33:10,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:10,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:10,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:10,710 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2020-12-21 22:33:10,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:10,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871431867] [2020-12-21 22:33:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:10,726 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:10,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006427384] [2020-12-21 22:33:10,727 INFO L95 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 [2020-12-21 22:33:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:33:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:33:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:33:10,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871431867] [2020-12-21 22:33:10,849 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:10,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006427384] [2020-12-21 22:33:10,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:33:10,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:33:10,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057292534] [2020-12-21 22:33:10,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:33:10,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:10,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:33:10,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:33:10,854 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 4 states. [2020-12-21 22:33:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:10,969 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-12-21 22:33:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:33:10,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-21 22:33:10,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:10,970 INFO L225 Difference]: With dead ends: 67 [2020-12-21 22:33:10,970 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:33:10,971 INFO L677 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 [2020-12-21 22:33:10,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:33:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-12-21 22:33:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 22:33:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-12-21 22:33:10,979 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2020-12-21 22:33:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:10,979 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-12-21 22:33:10,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:33:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-12-21 22:33:10,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 22:33:10,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:10,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:11,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:11,196 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2020-12-21 22:33:11,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:11,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573187176] [2020-12-21 22:33:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:11,209 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:11,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29228258] [2020-12-21 22:33:11,210 INFO L95 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 [2020-12-21 22:33:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:33:11,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:33:11,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:33:11,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573187176] [2020-12-21 22:33:11,343 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:11,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29228258] [2020-12-21 22:33:11,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:33:11,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:33:11,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318848236] [2020-12-21 22:33:11,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:33:11,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:11,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:33:11,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:33:11,345 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 5 states. [2020-12-21 22:33:11,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:11,464 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2020-12-21 22:33:11,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:33:11,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-21 22:33:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:11,466 INFO L225 Difference]: With dead ends: 79 [2020-12-21 22:33:11,466 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 22:33:11,467 INFO L677 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 [2020-12-21 22:33:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 22:33:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-12-21 22:33:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:33:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-12-21 22:33:11,484 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 18 [2020-12-21 22:33:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:11,485 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-12-21 22:33:11,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:33:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-12-21 22:33:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:33:11,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:11,489 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:11,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:11,705 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:11,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:11,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1771086529, now seen corresponding path program 2 times [2020-12-21 22:33:11,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:11,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498943430] [2020-12-21 22:33:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:11,718 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:11,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976151967] [2020-12-21 22:33:11,718 INFO L93 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 [2020-12-21 22:33:11,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:33:11,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:33:11,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:33:11,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:33:11,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498943430] [2020-12-21 22:33:11,813 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:11,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976151967] [2020-12-21 22:33:11,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:33:11,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:33:11,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331358439] [2020-12-21 22:33:11,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:33:11,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:11,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:33:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:33:11,815 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 4 states. [2020-12-21 22:33:11,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:11,873 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2020-12-21 22:33:11,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:33:11,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-21 22:33:11,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:11,875 INFO L225 Difference]: With dead ends: 87 [2020-12-21 22:33:11,875 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 22:33:11,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:33:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 22:33:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2020-12-21 22:33:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:33:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-12-21 22:33:11,888 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 19 [2020-12-21 22:33:11,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:11,888 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-12-21 22:33:11,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:33:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-12-21 22:33:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:33:11,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:11,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:12,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:12,103 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:12,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1618381713, now seen corresponding path program 1 times [2020-12-21 22:33:12,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:12,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921447198] [2020-12-21 22:33:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:12,131 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:12,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495669420] [2020-12-21 22:33:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:33:12,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:33:12,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 22:33:12,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921447198] [2020-12-21 22:33:12,269 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:12,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495669420] [2020-12-21 22:33:12,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:33:12,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:33:12,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961015207] [2020-12-21 22:33:12,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:33:12,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:12,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:33:12,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:33:12,271 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2020-12-21 22:33:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:12,377 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2020-12-21 22:33:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:33:12,378 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-12-21 22:33:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:12,379 INFO L225 Difference]: With dead ends: 95 [2020-12-21 22:33:12,379 INFO L226 Difference]: Without dead ends: 58 [2020-12-21 22:33:12,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:33:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-21 22:33:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-12-21 22:33:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 22:33:12,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-12-21 22:33:12,391 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 31 [2020-12-21 22:33:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:12,392 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-12-21 22:33:12,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:33:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-12-21 22:33:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:33:12,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:12,393 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:12,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:12,608 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash -440379608, now seen corresponding path program 2 times [2020-12-21 22:33:12,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:12,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819862956] [2020-12-21 22:33:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:12,623 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:12,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006702131] [2020-12-21 22:33:12,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 22:33:12,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:33:12,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:33:12,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:33:12,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 22:33:12,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819862956] [2020-12-21 22:33:12,776 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:12,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006702131] [2020-12-21 22:33:12,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:33:12,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:33:12,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930310169] [2020-12-21 22:33:12,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:33:12,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:12,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:33:12,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:33:12,779 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 7 states. [2020-12-21 22:33:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:12,890 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2020-12-21 22:33:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:33:12,891 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 22:33:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:12,892 INFO L225 Difference]: With dead ends: 111 [2020-12-21 22:33:12,892 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 22:33:12,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:33:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 22:33:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2020-12-21 22:33:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:33:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-12-21 22:33:12,915 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 35 [2020-12-21 22:33:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:12,915 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-12-21 22:33:12,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:33:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-12-21 22:33:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 22:33:12,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:12,917 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:13,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:33:13,132 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:13,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:13,132 INFO L82 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 3 times [2020-12-21 22:33:13,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:13,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121280633] [2020-12-21 22:33:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:13,151 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:13,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635573697] [2020-12-21 22:33:13,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 22:33:13,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:33:13,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:33:13,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:33:13,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 22:33:13,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121280633] [2020-12-21 22:33:13,292 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:13,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635573697] [2020-12-21 22:33:13,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:33:13,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 22:33:13,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558874434] [2020-12-21 22:33:13,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:33:13,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:13,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:33:13,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:33:13,295 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2020-12-21 22:33:13,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:13,344 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2020-12-21 22:33:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:33:13,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-12-21 22:33:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:13,347 INFO L225 Difference]: With dead ends: 114 [2020-12-21 22:33:13,347 INFO L226 Difference]: Without dead ends: 73 [2020-12-21 22:33:13,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:33:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-21 22:33:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-12-21 22:33:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 22:33:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-12-21 22:33:13,360 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 39 [2020-12-21 22:33:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:13,360 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-12-21 22:33:13,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:33:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-12-21 22:33:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:33:13,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:13,362 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:13,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:13,573 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:13,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1913562003, now seen corresponding path program 4 times [2020-12-21 22:33:13,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:13,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323279498] [2020-12-21 22:33:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:13,585 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:13,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585861012] [2020-12-21 22:33:13,586 INFO L93 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 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 [2020-12-21 22:33:13,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:33:13,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:33:13,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:33:13,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:47,227 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:33:47,233 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:33:47,241 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:33:47,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:33:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 0 refuted. 6 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-21 22:33:47,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323279498] [2020-12-21 22:33:47,350 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:47,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585861012] [2020-12-21 22:33:47,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:33:47,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 22:33:47,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855921560] [2020-12-21 22:33:47,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 22:33:47,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 22:33:47,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=139, Unknown=15, NotChecked=0, Total=210 [2020-12-21 22:33:47,353 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 15 states. [2020-12-21 22:33:57,854 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 42 [2020-12-21 22:34:00,060 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-21 22:35:33,153 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-21 22:35:55,511 WARN L197 SmtUtils]: Spent 4.12 s on a formula simplification that was a NOOP. DAG size: 61 [2020-12-21 22:36:16,029 WARN L197 SmtUtils]: Spent 6.18 s on a formula simplification that was a NOOP. DAG size: 70 [2020-12-21 22:36:34,494 WARN L197 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 73 [2020-12-21 22:36:46,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:36:46,861 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2020-12-21 22:36:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 22:36:46,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-12-21 22:36:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:36:46,863 INFO L225 Difference]: With dead ends: 110 [2020-12-21 22:36:46,864 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 22:36:46,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 125.1s TimeCoverageRelationStatistics Valid=119, Invalid=339, Unknown=48, NotChecked=0, Total=506 [2020-12-21 22:36:46,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 22:36:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2020-12-21 22:36:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-21 22:36:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2020-12-21 22:36:46,883 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 49 [2020-12-21 22:36:46,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:36:46,883 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2020-12-21 22:36:46,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 22:36:46,883 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2020-12-21 22:36:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:36:46,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:36:46,899 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:36:47,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:36:47,114 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:36:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:36:47,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1794599279, now seen corresponding path program 1 times [2020-12-21 22:36:47,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:36:47,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394718284] [2020-12-21 22:36:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:36:47,133 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:36:47,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122760743] [2020-12-21 22:36:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-12-21 22:36:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:36:47,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:36:47,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:36:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 22:36:47,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394718284] [2020-12-21 22:36:47,409 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:36:47,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122760743] [2020-12-21 22:36:47,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:36:47,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:36:47,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793468516] [2020-12-21 22:36:47,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:36:47,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:36:47,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:36:47,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:36:47,411 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand 8 states. [2020-12-21 22:36:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:36:47,619 INFO L93 Difference]: Finished difference Result 235 states and 306 transitions. [2020-12-21 22:36:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:36:47,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-12-21 22:36:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:36:47,621 INFO L225 Difference]: With dead ends: 235 [2020-12-21 22:36:47,621 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 22:36:47,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:36:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 22:36:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2020-12-21 22:36:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 22:36:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2020-12-21 22:36:47,650 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 49 [2020-12-21 22:36:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:36:47,651 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2020-12-21 22:36:47,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:36:47,654 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2020-12-21 22:36:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 22:36:47,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:36:47,658 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:36:47,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:36:47,870 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:36:47,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:36:47,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1853245373, now seen corresponding path program 2 times [2020-12-21 22:36:47,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:36:47,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39485804] [2020-12-21 22:36:47,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:36:47,881 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:36:47,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460643548] [2020-12-21 22:36:47,882 INFO L93 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 [2020-12-21 22:36:47,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:36:47,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:36:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:36:47,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:36:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-21 22:36:48,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39485804] [2020-12-21 22:36:48,214 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:36:48,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460643548] [2020-12-21 22:36:48,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:36:48,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:36:48,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191175477] [2020-12-21 22:36:48,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:36:48,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:36:48,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:36:48,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:36:48,217 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand 9 states. [2020-12-21 22:36:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:36:48,486 INFO L93 Difference]: Finished difference Result 271 states and 351 transitions. [2020-12-21 22:36:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:36:48,487 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-12-21 22:36:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:36:48,489 INFO L225 Difference]: With dead ends: 271 [2020-12-21 22:36:48,489 INFO L226 Difference]: Without dead ends: 159 [2020-12-21 22:36:48,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:36:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-21 22:36:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 133. [2020-12-21 22:36:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-21 22:36:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 172 transitions. [2020-12-21 22:36:48,508 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 172 transitions. Word has length 54 [2020-12-21 22:36:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:36:48,508 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 172 transitions. [2020-12-21 22:36:48,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:36:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 172 transitions. [2020-12-21 22:36:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 22:36:48,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:36:48,510 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 6, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:36:48,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:36:48,724 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:36:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:36:48,725 INFO L82 PathProgramCache]: Analyzing trace with hash -32752209, now seen corresponding path program 3 times [2020-12-21 22:36:48,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:36:48,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261219564] [2020-12-21 22:36:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:36:48,734 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:36:48,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325115443] [2020-12-21 22:36:48,738 INFO L93 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 [2020-12-21 22:36:48,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:36:48,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:36:48,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:36:48,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:36:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-12-21 22:36:48,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261219564] [2020-12-21 22:36:48,957 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:36:48,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325115443] [2020-12-21 22:36:48,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:36:48,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:36:48,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389849322] [2020-12-21 22:36:48,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:36:48,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:36:48,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:36:48,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:36:48,960 INFO L87 Difference]: Start difference. First operand 133 states and 172 transitions. Second operand 5 states. [2020-12-21 22:36:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:36:49,106 INFO L93 Difference]: Finished difference Result 370 states and 484 transitions. [2020-12-21 22:36:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:36:49,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-12-21 22:36:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:36:49,110 INFO L225 Difference]: With dead ends: 370 [2020-12-21 22:36:49,111 INFO L226 Difference]: Without dead ends: 338 [2020-12-21 22:36:49,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:36:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-12-21 22:36:49,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 157. [2020-12-21 22:36:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-21 22:36:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 204 transitions. [2020-12-21 22:36:49,135 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 204 transitions. Word has length 59 [2020-12-21 22:36:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:36:49,135 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 204 transitions. [2020-12-21 22:36:49,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:36:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 204 transitions. [2020-12-21 22:36:49,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 22:36:49,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:36:49,137 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:36:49,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:36:49,351 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:36:49,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:36:49,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1244819935, now seen corresponding path program 4 times [2020-12-21 22:36:49,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:36:49,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375205589] [2020-12-21 22:36:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:36:49,361 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:36:49,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403846945] [2020-12-21 22:36:49,361 INFO L93 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 [2020-12-21 22:36:49,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:36:49,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:36:49,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:36:49,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:36:49,576 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-21 22:36:49,579 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:36:49,589 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:36:49,590 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:36:49,590 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-21 22:36:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2020-12-21 22:36:49,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375205589] [2020-12-21 22:36:49,680 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:36:49,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403846945] [2020-12-21 22:36:49,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:36:49,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 22:36:49,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194263307] [2020-12-21 22:36:49,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:36:49,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:36:49,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:36:49,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:36:49,682 INFO L87 Difference]: Start difference. First operand 157 states and 204 transitions. Second operand 6 states. [2020-12-21 22:36:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:36:49,930 INFO L93 Difference]: Finished difference Result 326 states and 430 transitions. [2020-12-21 22:36:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:36:49,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-21 22:36:49,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:36:49,933 INFO L225 Difference]: With dead ends: 326 [2020-12-21 22:36:49,933 INFO L226 Difference]: Without dead ends: 199 [2020-12-21 22:36:49,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:36:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-12-21 22:36:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 159. [2020-12-21 22:36:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-21 22:36:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 206 transitions. [2020-12-21 22:36:49,955 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 206 transitions. Word has length 83 [2020-12-21 22:36:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:36:49,956 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 206 transitions. [2020-12-21 22:36:49,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:36:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 206 transitions. [2020-12-21 22:36:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 22:36:49,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:36:49,961 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:36:50,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:36:50,175 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:36:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:36:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1511807331, now seen corresponding path program 5 times [2020-12-21 22:36:50,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:36:50,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318439157] [2020-12-21 22:36:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:36:50,195 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:36:50,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744585228] [2020-12-21 22:36:50,199 INFO L93 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