/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/nla-digbench-scaling/ps6-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 18:08:52,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 18:08:52,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 18:08:52,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 18:08:52,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 18:08:52,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 18:08:52,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 18:08:52,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 18:08:52,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 18:08:52,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 18:08:52,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 18:08:52,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 18:08:52,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 18:08:52,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 18:08:52,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 18:08:52,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 18:08:52,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 18:08:52,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 18:08:52,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 18:08:52,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 18:08:52,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 18:08:52,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 18:08:52,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 18:08:52,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 18:08:52,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 18:08:52,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 18:08:52,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 18:08:52,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 18:08:52,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 18:08:52,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 18:08:52,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 18:08:52,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 18:08:52,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 18:08:52,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 18:08:52,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 18:08:52,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 18:08:52,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 18:08:52,358 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 18:08:52,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 18:08:52,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 18:08:52,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 18:08:52,363 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 18:08:52,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 18:08:52,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 18:08:52,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 18:08:52,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 18:08:52,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 18:08:52,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 18:08:52,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 18:08:52,366 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 18:08:52,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 18:08:52,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 18:08:52,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 18:08:52,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 18:08:52,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 18:08:52,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 18:08:52,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 18:08:52,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 18:08:52,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 18:08:52,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 18:08:52,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 18:08:52,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 18:08:52,368 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 18:08:52,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 18:08:52,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 18:08:52,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 18:08:52,788 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 18:08:52,789 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 18:08:52,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-01-06 18:08:52,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0ed084377/ef2a5fbbabed4f9eae289e9f2069d7fe/FLAG404af6880 [2021-01-06 18:08:53,485 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 18:08:53,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-01-06 18:08:53,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0ed084377/ef2a5fbbabed4f9eae289e9f2069d7fe/FLAG404af6880 [2021-01-06 18:08:53,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0ed084377/ef2a5fbbabed4f9eae289e9f2069d7fe [2021-01-06 18:08:53,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 18:08:53,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 18:08:53,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 18:08:53,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 18:08:53,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 18:08:53,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:08:53" (1/1) ... [2021-01-06 18:08:53,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@399917c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:53, skipping insertion in model container [2021-01-06 18:08:53,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:08:53" (1/1) ... [2021-01-06 18:08:53,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 18:08:53,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 18:08:54,053 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 18:08:54,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:08:54,086 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 18:08:54,100 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 18:08:54,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:08:54,126 INFO L208 MainTranslator]: Completed translation [2021-01-06 18:08:54,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54 WrapperNode [2021-01-06 18:08:54,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 18:08:54,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 18:08:54,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 18:08:54,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 18:08:54,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54" (1/1) ... [2021-01-06 18:08:54,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54" (1/1) ... [2021-01-06 18:08:54,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 18:08:54,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 18:08:54,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 18:08:54,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 18:08:54,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54" (1/1) ... [2021-01-06 18:08:54,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54" (1/1) ... [2021-01-06 18:08:54,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54" (1/1) ... [2021-01-06 18:08:54,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54" (1/1) ... [2021-01-06 18:08:54,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54" (1/1) ... [2021-01-06 18:08:54,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54" (1/1) ... [2021-01-06 18:08:54,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54" (1/1) ... [2021-01-06 18:08:54,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 18:08:54,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 18:08:54,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 18:08:54,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 18:08:54,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 18:08:54,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 18:08:54,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 18:08:54,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 18:08:54,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 18:08:54,578 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 18:08:54,578 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 18:08:54,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:08:54 BoogieIcfgContainer [2021-01-06 18:08:54,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 18:08:54,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 18:08:54,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 18:08:54,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 18:08:54,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 06:08:53" (1/3) ... [2021-01-06 18:08:54,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9e2dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:08:54, skipping insertion in model container [2021-01-06 18:08:54,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:54" (2/3) ... [2021-01-06 18:08:54,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9e2dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:08:54, skipping insertion in model container [2021-01-06 18:08:54,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:08:54" (3/3) ... [2021-01-06 18:08:54,591 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound5.c [2021-01-06 18:08:54,599 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 18:08:54,604 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 18:08:54,625 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 18:08:54,671 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 18:08:54,673 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 18:08:54,673 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 18:08:54,674 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 18:08:54,674 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 18:08:54,674 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 18:08:54,674 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 18:08:54,674 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 18:08:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 18:08:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 18:08:54,714 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:08:54,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:08:54,717 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:08:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:08:54,725 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-01-06 18:08:54,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:08:54,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007675617] [2021-01-06 18:08:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:08:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:08:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:08:54,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007675617] [2021-01-06 18:08:54,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:08:54,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 18:08:54,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687023695] [2021-01-06 18:08:54,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 18:08:54,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:08:54,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 18:08:54,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:08:54,927 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-01-06 18:08:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:08:54,946 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-01-06 18:08:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 18:08:54,948 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 18:08:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:08:54,957 INFO L225 Difference]: With dead ends: 43 [2021-01-06 18:08:54,958 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 18:08:54,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:08:55,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 18:08:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 18:08:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 18:08:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 18:08:55,026 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 9 [2021-01-06 18:08:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:08:55,027 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 18:08:55,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 18:08:55,027 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 18:08:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 18:08:55,028 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:08:55,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:08:55,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 18:08:55,029 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:08:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:08:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-01-06 18:08:55,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:08:55,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699771040] [2021-01-06 18:08:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:08:55,077 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:08:55,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492252217] [2021-01-06 18:08:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 18:08:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:08:55,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 18:08:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:08:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:08:55,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699771040] [2021-01-06 18:08:55,295 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:08:55,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492252217] [2021-01-06 18:08:55,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:08:55,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 18:08:55,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120494560] [2021-01-06 18:08:55,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 18:08:55,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:08:55,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 18:08:55,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:08:55,299 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2021-01-06 18:10:35,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:10:35,475 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-01-06 18:10:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:10:35,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 18:10:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:10:35,477 INFO L225 Difference]: With dead ends: 33 [2021-01-06 18:10:35,477 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 18:10:35,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:10:35,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 18:10:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-01-06 18:10:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 18:10:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-01-06 18:10:35,490 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 9 [2021-01-06 18:10:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:10:35,494 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-01-06 18:10:35,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 18:10:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-01-06 18:10:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 18:10:35,495 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:10:35,495 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:10:35,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 18:10:35,696 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:10:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:10:35,698 INFO L82 PathProgramCache]: Analyzing trace with hash 636965506, now seen corresponding path program 1 times [2021-01-06 18:10:35,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:10:35,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545741994] [2021-01-06 18:10:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:10:35,719 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:10:35,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048260455] [2021-01-06 18:10:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 18:10:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:10:35,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 18:10:35,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:10:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:10:35,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545741994] [2021-01-06 18:10:35,885 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:10:35,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048260455] [2021-01-06 18:10:35,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:10:35,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 18:10:35,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725332939] [2021-01-06 18:10:35,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:10:35,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:10:35,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:10:35,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:10:35,888 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2021-01-06 18:10:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:10:38,273 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-01-06 18:10:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:10:38,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-01-06 18:10:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:10:38,275 INFO L225 Difference]: With dead ends: 36 [2021-01-06 18:10:38,275 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 18:10:38,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 18:10:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 18:10:38,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-01-06 18:10:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 18:10:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 18:10:38,284 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2021-01-06 18:10:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:10:38,284 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 18:10:38,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:10:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 18:10:38,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 18:10:38,286 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:10:38,286 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:10:38,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:10:38,502 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:10:38,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:10:38,503 INFO L82 PathProgramCache]: Analyzing trace with hash 678815956, now seen corresponding path program 2 times [2021-01-06 18:10:38,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:10:38,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557886410] [2021-01-06 18:10:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:10:38,527 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:10:38,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006628529] [2021-01-06 18:10:38,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 18:10:38,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 18:10:38,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:10:38,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 18:10:38,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:10:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:10:38,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557886410] [2021-01-06 18:10:38,795 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:10:38,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006628529] [2021-01-06 18:10:38,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:10:38,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 18:10:38,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537294538] [2021-01-06 18:10:38,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:10:38,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:10:38,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:10:38,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:10:38,798 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2021-01-06 18:10:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:10:38,973 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-01-06 18:10:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 18:10:38,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-01-06 18:10:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:10:38,975 INFO L225 Difference]: With dead ends: 45 [2021-01-06 18:10:38,975 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 18:10:38,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 18:10:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 18:10:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-01-06 18:10:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 18:10:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 18:10:38,984 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 15 [2021-01-06 18:10:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:10:38,984 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 18:10:38,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:10:38,984 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 18:10:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 18:10:38,985 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:10:38,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:10:39,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:10:39,193 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:10:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:10:39,194 INFO L82 PathProgramCache]: Analyzing trace with hash -531865812, now seen corresponding path program 1 times [2021-01-06 18:10:39,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:10:39,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986453732] [2021-01-06 18:10:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:10:39,219 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:10:39,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450240438] [2021-01-06 18:10:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 18:10:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:10:39,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 18:10:39,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:10:39,418 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 18:10:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:10:39,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986453732] [2021-01-06 18:10:39,437 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:10:39,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450240438] [2021-01-06 18:10:39,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:10:39,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 18:10:39,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350253760] [2021-01-06 18:10:39,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 18:10:39,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:10:39,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 18:10:39,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:10:39,440 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2021-01-06 18:10:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:10:39,670 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-01-06 18:10:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:10:39,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2021-01-06 18:10:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:10:39,672 INFO L225 Difference]: With dead ends: 36 [2021-01-06 18:10:39,672 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 18:10:39,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-01-06 18:10:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 18:10:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 18:10:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 18:10:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 18:10:39,680 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2021-01-06 18:10:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:10:39,680 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 18:10:39,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 18:10:39,680 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 18:10:39,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 18:10:39,681 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:10:39,681 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:10:39,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:10:39,895 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:10:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:10:39,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1905056066, now seen corresponding path program 3 times [2021-01-06 18:10:39,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:10:39,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866652456] [2021-01-06 18:10:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:10:39,910 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:10:39,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50794363] [2021-01-06 18:10:39,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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