/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/ps4-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:04:59,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:04:59,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:04:59,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:04:59,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:04:59,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:04:59,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:04:59,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:04:59,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:04:59,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:04:59,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:04:59,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:04:59,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:04:59,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:04:59,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:04:59,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:04:59,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:04:59,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:04:59,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:04:59,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:04:59,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:04:59,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:04:59,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:04:59,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:04:59,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:04:59,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:04:59,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:04:59,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:04:59,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:04:59,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:04:59,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:04:59,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:04:59,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:04:59,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:04:59,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:04:59,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:04:59,775 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 08:04:59,816 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:04:59,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:04:59,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:04:59,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:04:59,821 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:04:59,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:04:59,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:04:59,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:04:59,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:04:59,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:04:59,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:04:59,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:04:59,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:04:59,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:04:59,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:04:59,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:04:59,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:04:59,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:04:59,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:04:59,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:04:59,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:04:59,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:04:59,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:04:59,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:04:59,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:04:59,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:05:00,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:05:00,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:05:00,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:05:00,235 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:05:00,236 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:05:00,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c [2020-12-23 08:05:00,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a628641fe/b8b24f76596249b1a61708caa3bb6cd9/FLAG09705e386 [2020-12-23 08:05:00,900 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:05:00,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c [2020-12-23 08:05:00,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a628641fe/b8b24f76596249b1a61708caa3bb6cd9/FLAG09705e386 [2020-12-23 08:05:01,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a628641fe/b8b24f76596249b1a61708caa3bb6cd9 [2020-12-23 08:05:01,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:05:01,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:05:01,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:05:01,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:05:01,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:05:01,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:05:01" (1/1) ... [2020-12-23 08:05:01,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc15867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01, skipping insertion in model container [2020-12-23 08:05:01,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:05:01" (1/1) ... [2020-12-23 08:05:01,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:05:01,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:05:01,500 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/ps4-ll_valuebound10.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 08:05:01,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:05:01,528 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:05:01,542 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/ps4-ll_valuebound10.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 08:05:01,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:05:01,565 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:05:01,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01 WrapperNode [2020-12-23 08:05:01,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:05:01,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:05:01,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:05:01,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:05:01,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01" (1/1) ... [2020-12-23 08:05:01,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01" (1/1) ... [2020-12-23 08:05:01,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:05:01,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:05:01,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:05:01,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:05:01,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01" (1/1) ... [2020-12-23 08:05:01,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01" (1/1) ... [2020-12-23 08:05:01,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01" (1/1) ... [2020-12-23 08:05:01,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01" (1/1) ... [2020-12-23 08:05:01,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01" (1/1) ... [2020-12-23 08:05:01,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01" (1/1) ... [2020-12-23 08:05:01,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01" (1/1) ... [2020-12-23 08:05:01,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:05:01,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:05:01,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:05:01,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:05:01,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01" (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 08:05:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:05:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:05:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:05:01,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:05:02,138 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:05:02,138 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 08:05:02,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:05:02 BoogieIcfgContainer [2020-12-23 08:05:02,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:05:02,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:05:02,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:05:02,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:05:02,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:05:01" (1/3) ... [2020-12-23 08:05:02,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4213fa0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:05:02, skipping insertion in model container [2020-12-23 08:05:02,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:01" (2/3) ... [2020-12-23 08:05:02,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4213fa0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:05:02, skipping insertion in model container [2020-12-23 08:05:02,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:05:02" (3/3) ... [2020-12-23 08:05:02,160 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound10.c [2020-12-23 08:05:02,173 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:05:02,181 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-23 08:05:02,228 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 08:05:02,274 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:05:02,274 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:05:02,274 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:05:02,274 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:05:02,275 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:05:02,275 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:05:02,275 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:05:02,275 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:05:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 08:05:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 08:05:02,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:02,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:02,298 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:02,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-23 08:05:02,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:02,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5025045] [2020-12-23 08:05:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:02,470 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 08:05:02,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5025045] [2020-12-23 08:05:02,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:05:02,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:05:02,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284529005] [2020-12-23 08:05:02,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:05:02,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:02,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:05:02,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:05:02,494 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 08:05:02,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:02,512 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-12-23 08:05:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:05:02,514 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 08:05:02,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:02,523 INFO L225 Difference]: With dead ends: 39 [2020-12-23 08:05:02,523 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 08:05:02,528 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 08:05:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 08:05:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 08:05:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 08:05:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 08:05:02,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2020-12-23 08:05:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:02,571 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 08:05:02,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:05:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 08:05:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 08:05:02,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:02,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:02,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:05:02,573 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:02,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:02,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-23 08:05:02,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:02,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263490485] [2020-12-23 08:05:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:02,592 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:02,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105852019] [2020-12-23 08:05:02,593 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 08:05:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:02,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 08:05:02,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:02,844 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 08:05:02,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263490485] [2020-12-23 08:05:02,845 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:02,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105852019] [2020-12-23 08:05:02,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:05:02,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 08:05:02,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98790443] [2020-12-23 08:05:02,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:05:02,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:02,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:05:02,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:05:02,850 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-12-23 08:05:02,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:02,949 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-23 08:05:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:05:02,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 08:05:02,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:02,951 INFO L225 Difference]: With dead ends: 31 [2020-12-23 08:05:02,951 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 08:05:02,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:05:02,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 08:05:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-23 08:05:02,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:05:02,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 08:05:02,958 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2020-12-23 08:05:02,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:02,958 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 08:05:02,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:05:02,958 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 08:05:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 08:05:02,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:02,959 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:03,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:05:03,174 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:03,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:03,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2020-12-23 08:05:03,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:03,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471695969] [2020-12-23 08:05:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:03,191 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:03,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262736351] [2020-12-23 08:05:03,191 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 08:05:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:03,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:05:03,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:03,322 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 08:05:03,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471695969] [2020-12-23 08:05:03,323 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:03,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262736351] [2020-12-23 08:05:03,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:03,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:05:03,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376229468] [2020-12-23 08:05:03,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:05:03,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:03,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:05:03,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:05:03,327 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2020-12-23 08:05:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:03,472 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-23 08:05:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:05:03,473 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 08:05:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:03,474 INFO L225 Difference]: With dead ends: 34 [2020-12-23 08:05:03,474 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 08:05:03,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 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 08:05:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 08:05:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-12-23 08:05:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 08:05:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-23 08:05:03,483 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2020-12-23 08:05:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:03,483 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-23 08:05:03,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:05:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-23 08:05:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 08:05:03,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:03,484 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:03,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:03,699 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:03,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:03,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2020-12-23 08:05:03,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:03,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710022355] [2020-12-23 08:05:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:03,716 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:03,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828327961] [2020-12-23 08:05:03,717 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 [2020-12-23 08:05:03,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:05:03,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:05:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 08:05:03,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:05:03,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710022355] [2020-12-23 08:05:03,960 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:03,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828327961] [2020-12-23 08:05:03,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:03,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:05:03,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078280125] [2020-12-23 08:05:03,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:05:03,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:03,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:05:03,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:05:03,963 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-12-23 08:05:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:04,069 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-23 08:05:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 08:05:04,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 08:05:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:04,071 INFO L225 Difference]: With dead ends: 41 [2020-12-23 08:05:04,071 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 08:05:04,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 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 08:05:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 08:05:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-23 08:05:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:05:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 08:05:04,080 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2020-12-23 08:05:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:04,081 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 08:05:04,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:05:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 08:05:04,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 08:05:04,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:04,082 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:04,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:04,296 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2052638844, now seen corresponding path program 1 times [2020-12-23 08:05:04,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:04,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272254399] [2020-12-23 08:05:04,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:04,315 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:04,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70155861] [2020-12-23 08:05:04,318 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 [2020-12-23 08:05:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:04,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 08:05:04,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:04,473 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 08:05:04,488 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 08:05:04,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272254399] [2020-12-23 08:05:04,488 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:04,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70155861] [2020-12-23 08:05:04,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:04,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:05:04,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264417069] [2020-12-23 08:05:04,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:05:04,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:04,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:05:04,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:05:04,491 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-23 08:05:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:04,701 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-23 08:05:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:05:04,702 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 08:05:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:04,703 INFO L225 Difference]: With dead ends: 32 [2020-12-23 08:05:04,703 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 08:05:04,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 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 08:05:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 08:05:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 08:05:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:05:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-23 08:05:04,710 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 13 [2020-12-23 08:05:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:04,711 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-23 08:05:04,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:05:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-23 08:05:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:05:04,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:04,712 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:04,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:04,927 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:04,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2020-12-23 08:05:04,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:04,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556276949] [2020-12-23 08:05:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:04,941 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:04,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958287869] [2020-12-23 08:05:04,942 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