/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/ps5-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:05:11,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:05:11,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:05:11,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:05:11,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:05:11,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:05:11,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:05:11,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:05:11,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:05:11,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:05:11,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:05:11,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:05:11,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:05:11,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:05:11,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:05:11,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:05:11,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:05:11,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:05:11,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:05:11,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:05:11,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:05:11,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:05:11,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:05:11,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:05:11,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:05:11,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:05:11,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:05:11,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:05:11,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:05:11,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:05:11,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:05:11,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:05:11,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:05:11,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:05:11,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:05:11,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:05:11,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 08:05:11,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:05:11,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:05:11,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:05:11,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:05:11,794 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:05:11,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:05:11,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:05:11,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:05:11,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:05:11,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:05:11,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:05:11,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:05:11,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:05:11,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:05:11,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:05:11,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:05:11,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:05:11,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:05:11,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:05:11,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:05:11,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:05:11,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:05:11,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:05:11,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:05:11,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:05:11,799 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:05:12,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:05:12,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:05:12,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:05:12,209 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:05:12,210 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:05:12,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2020-12-23 08:05:12,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6ececa3bf/14d3473004bf41a6a52a5881c082c9ee/FLAG6fbac61ed [2020-12-23 08:05:12,904 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:05:12,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2020-12-23 08:05:12,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6ececa3bf/14d3473004bf41a6a52a5881c082c9ee/FLAG6fbac61ed [2020-12-23 08:05:13,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6ececa3bf/14d3473004bf41a6a52a5881c082c9ee [2020-12-23 08:05:13,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:05:13,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:05:13,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:05:13,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:05:13,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:05:13,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:05:13" (1/1) ... [2020-12-23 08:05:13,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30132c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13, skipping insertion in model container [2020-12-23 08:05:13,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:05:13" (1/1) ... [2020-12-23 08:05:13,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:05:13,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:05:13,508 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/ps5-ll_unwindbound10.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,] [2020-12-23 08:05:13,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:05:13,554 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:05:13,573 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/ps5-ll_unwindbound10.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,] [2020-12-23 08:05:13,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:05:13,628 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:05:13,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13 WrapperNode [2020-12-23 08:05:13,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:05:13,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:05:13,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:05:13,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:05:13,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13" (1/1) ... [2020-12-23 08:05:13,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13" (1/1) ... [2020-12-23 08:05:13,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:05:13,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:05:13,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:05:13,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:05:13,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13" (1/1) ... [2020-12-23 08:05:13,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13" (1/1) ... [2020-12-23 08:05:13,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13" (1/1) ... [2020-12-23 08:05:13,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13" (1/1) ... [2020-12-23 08:05:13,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13" (1/1) ... [2020-12-23 08:05:13,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13" (1/1) ... [2020-12-23 08:05:13,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13" (1/1) ... [2020-12-23 08:05:13,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:05:13,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:05:13,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:05:13,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:05:13,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13" (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 [2020-12-23 08:05:13,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:05:13,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:05:13,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:05:13,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:05:14,185 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:05:14,186 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 08:05:14,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:05:14 BoogieIcfgContainer [2020-12-23 08:05:14,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:05:14,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:05:14,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:05:14,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:05:14,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:05:13" (1/3) ... [2020-12-23 08:05:14,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e073314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:05:14, skipping insertion in model container [2020-12-23 08:05:14,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:13" (2/3) ... [2020-12-23 08:05:14,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e073314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:05:14, skipping insertion in model container [2020-12-23 08:05:14,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:05:14" (3/3) ... [2020-12-23 08:05:14,211 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound10.c [2020-12-23 08:05:14,227 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:05:14,235 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-23 08:05:14,283 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 08:05:14,349 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:05:14,349 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:05:14,349 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:05:14,349 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:05:14,349 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:05:14,350 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:05:14,350 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:05:14,350 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:05:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-23 08:05:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:05:14,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:14,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:14,384 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:14,389 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2020-12-23 08:05:14,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:14,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376250874] [2020-12-23 08:05:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:05:14,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376250874] [2020-12-23 08:05:14,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:05:14,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:05:14,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252709351] [2020-12-23 08:05:14,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:05:14,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:14,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:05:14,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:05:14,595 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-23 08:05:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:14,617 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-12-23 08:05:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:05:14,619 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 08:05:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:14,628 INFO L225 Difference]: With dead ends: 41 [2020-12-23 08:05:14,628 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 08:05:14,631 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 [2020-12-23 08:05:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 08:05:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 08:05:14,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 08:05:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 08:05:14,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-23 08:05:14,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:14,671 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 08:05:14,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:05:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 08:05:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:05:14,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:14,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:14,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:05:14,673 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:14,674 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-23 08:05:14,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:14,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430113411] [2020-12-23 08:05:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:14,694 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:14,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187748985] [2020-12-23 08:05:14,695 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 [2020-12-23 08:05:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 08:05:14,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:05:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430113411] [2020-12-23 08:05:14,910 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187748985] [2020-12-23 08:05:14,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:05:14,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 08:05:14,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586938665] [2020-12-23 08:05:14,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:05:14,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:14,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:05:14,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:05:14,915 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-12-23 08:05:15,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:15,042 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-23 08:05:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:05:15,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 08:05:15,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:15,044 INFO L225 Difference]: With dead ends: 36 [2020-12-23 08:05:15,044 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 08:05:15,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:05:15,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 08:05:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-23 08:05:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 08:05:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-23 08:05:15,052 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-12-23 08:05:15,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:15,052 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-23 08:05:15,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:05:15,052 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-23 08:05:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 08:05:15,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:15,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:15,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:05:15,267 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2020-12-23 08:05:15,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:15,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494297106] [2020-12-23 08:05:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:15,294 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:15,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645782143] [2020-12-23 08:05:15,299 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 [2020-12-23 08:05:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:15,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:05:15,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:05:15,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494297106] [2020-12-23 08:05:15,470 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:15,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645782143] [2020-12-23 08:05:15,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:15,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:05:15,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921915266] [2020-12-23 08:05:15,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:05:15,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:15,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:05:15,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:05:15,473 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-12-23 08:05:15,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:15,707 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-23 08:05:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:05:15,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 08:05:15,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:15,709 INFO L225 Difference]: With dead ends: 39 [2020-12-23 08:05:15,709 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 08:05:15,710 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 [2020-12-23 08:05:15,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 08:05:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-23 08:05:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:05:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-23 08:05:15,719 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2020-12-23 08:05:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:15,720 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-23 08:05:15,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:05:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-23 08:05:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 08:05:15,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:15,721 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:15,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:15,926 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:15,928 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2020-12-23 08:05:15,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:15,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170197220] [2020-12-23 08:05:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:15,945 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:15,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704828655] [2020-12-23 08:05:15,946 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 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 [2020-12-23 08:05:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:16,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 08:05:16,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:05:16,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170197220] [2020-12-23 08:05:16,062 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:16,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704828655] [2020-12-23 08:05:16,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:16,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 08:05:16,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251386732] [2020-12-23 08:05:16,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:05:16,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:16,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:05:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:05:16,065 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-12-23 08:05:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:16,097 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-23 08:05:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:05:16,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 08:05:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:16,099 INFO L225 Difference]: With dead ends: 34 [2020-12-23 08:05:16,099 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 08:05:16,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:05:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 08:05:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 08:05:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:05:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 08:05:16,107 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2020-12-23 08:05:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:16,107 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 08:05:16,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:05:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 08:05:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:05:16,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:16,109 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:16,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:16,323 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 2 times [2020-12-23 08:05:16,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:16,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213398993] [2020-12-23 08:05:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:16,340 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:16,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911418519] [2020-12-23 08:05:16,340 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 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 [2020-12-23 08:05:16,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:05:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:05:16,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 08:05:16,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:05:16,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213398993] [2020-12-23 08:05:16,749 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:16,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911418519] [2020-12-23 08:05:16,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:16,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:05:16,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143017898] [2020-12-23 08:05:16,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:05:16,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:16,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:05:16,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:05:16,755 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-23 08:05:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:16,901 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-23 08:05:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 08:05:16,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 08:05:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:16,908 INFO L225 Difference]: With dead ends: 49 [2020-12-23 08:05:16,909 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 08:05:16,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:05:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 08:05:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2020-12-23 08:05:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:05:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 08:05:16,924 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2020-12-23 08:05:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:16,924 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 08:05:16,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:05:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 08:05:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 08:05:16,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:16,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:17,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:17,136 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:17,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:17,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2020-12-23 08:05:17,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:17,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392208605] [2020-12-23 08:05:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:17,149 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:17,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246918793] [2020-12-23 08:05:17,150 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 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 [2020-12-23 08:05:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:17,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 08:05:17,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:17,306 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 08:05:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:05:17,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392208605] [2020-12-23 08:05:17,323 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:17,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246918793] [2020-12-23 08:05:17,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:17,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:05:17,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855095307] [2020-12-23 08:05:17,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:05:17,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:17,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:05:17,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:05:17,326 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-12-23 08:05:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:17,550 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-12-23 08:05:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:05:17,550 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-23 08:05:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:17,552 INFO L225 Difference]: With dead ends: 38 [2020-12-23 08:05:17,552 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 08:05:17,553 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 [2020-12-23 08:05:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 08:05:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 08:05:17,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:05:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-23 08:05:17,563 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2020-12-23 08:05:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:17,563 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-23 08:05:17,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:05:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-23 08:05:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 08:05:17,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:17,565 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:17,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 08:05:17,780 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2020-12-23 08:05:17,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:17,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534078072] [2020-12-23 08:05:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:17,795 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:17,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100685753] [2020-12-23 08:05:17,796 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 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 [2020-12-23 08:05:17,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:05:17,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:05:17,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 08:05:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:05:17,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534078072] [2020-12-23 08:05:17,914 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:17,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100685753] [2020-12-23 08:05:17,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:17,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 08:05:17,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689588262] [2020-12-23 08:05:17,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:05:17,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:17,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:05:17,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:05:17,916 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-12-23 08:05:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:17,980 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-23 08:05:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:05:17,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-23 08:05:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:17,983 INFO L225 Difference]: With dead ends: 38 [2020-12-23 08:05:17,983 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 08:05:17,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:05:17,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 08:05:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 08:05:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:05:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-23 08:05:17,997 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2020-12-23 08:05:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:17,997 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-23 08:05:17,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:05:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-23 08:05:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 08:05:17,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:17,999 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:18,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:18,215 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:18,216 INFO L82 PathProgramCache]: Analyzing trace with hash 399986928, now seen corresponding path program 3 times [2020-12-23 08:05:18,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:18,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086327084] [2020-12-23 08:05:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:18,233 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:18,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143346408] [2020-12-23 08:05:18,234 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 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