/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:59:35,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:59:35,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:59:35,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:59:35,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:59:35,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:59:35,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:59:35,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:59:35,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:59:35,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:59:35,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:59:35,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:59:35,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:59:35,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:59:35,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:59:35,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:59:35,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:59:35,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:59:35,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:59:35,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:59:35,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:59:36,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:59:36,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:59:36,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:59:36,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:59:36,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:59:36,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:59:36,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:59:36,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:59:36,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:59:36,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:59:36,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:59:36,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:59:36,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:59:36,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:59:36,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:59:36,020 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:59:36,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:59:36,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:59:36,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:59:36,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:59:36,052 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:59:36,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:59:36,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:59:36,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:59:36,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:59:36,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:59:36,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:59:36,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:59:36,056 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:59:36,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:59:36,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:59:36,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:59:36,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:59:36,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:59:36,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:59:36,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:59:36,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:59:36,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:59:36,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:59:36,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:59:36,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:59:36,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:59:36,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:59:36,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:59:36,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:59:36,554 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:59:36,555 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:59:36,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2021-01-06 17:59:36,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07319f55e/4a0e850494c6404c8b75ee5fc354f052/FLAGe23b20848 [2021-01-06 17:59:37,402 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:59:37,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2021-01-06 17:59:37,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07319f55e/4a0e850494c6404c8b75ee5fc354f052/FLAGe23b20848 [2021-01-06 17:59:37,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07319f55e/4a0e850494c6404c8b75ee5fc354f052 [2021-01-06 17:59:37,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:59:37,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:59:37,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:59:37,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:59:37,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:59:37,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:59:37" (1/1) ... [2021-01-06 17:59:37,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a14b0f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:37, skipping insertion in model container [2021-01-06 17:59:37,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:59:37" (1/1) ... [2021-01-06 17:59:37,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:59:37,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:59:37,953 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_valuebound20.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 17:59:37,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:59:37,993 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:59:38,011 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_valuebound20.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 17:59:38,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:59:38,038 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:59:38,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38 WrapperNode [2021-01-06 17:59:38,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:59:38,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:59:38,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:59:38,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:59:38,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:38,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:38,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:59:38,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:59:38,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:59:38,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:59:38,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:38,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:38,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:38,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:38,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:38,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:38,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:38,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:59:38,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:59:38,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:59:38,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:59:38,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:59:38,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:59:38,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:59:38,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:59:38,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:59:38,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:59:38,759 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:59:38,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:59:38 BoogieIcfgContainer [2021-01-06 17:59:38,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:59:38,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:59:38,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:59:38,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:59:38,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:59:37" (1/3) ... [2021-01-06 17:59:38,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6476151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:59:38, skipping insertion in model container [2021-01-06 17:59:38,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (2/3) ... [2021-01-06 17:59:38,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6476151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:59:38, skipping insertion in model container [2021-01-06 17:59:38,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:59:38" (3/3) ... [2021-01-06 17:59:38,793 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound20.c [2021-01-06 17:59:38,801 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:59:38,809 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 17:59:38,834 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 17:59:38,884 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:59:38,884 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:59:38,884 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:59:38,885 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:59:38,885 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:59:38,885 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:59:38,885 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:59:38,885 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:59:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 17:59:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:59:38,911 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:38,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:38,913 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:38,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-01-06 17:59:38,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:38,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105733704] [2021-01-06 17:59:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:39,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105733704] [2021-01-06 17:59:39,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:59:39,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:59:39,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359388843] [2021-01-06 17:59:39,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:59:39,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:39,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:59:39,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:59:39,141 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 17:59:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:39,162 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-01-06 17:59:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:59:39,164 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:59:39,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:39,174 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:59:39,174 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:59:39,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:59:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:59:39,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 17:59:39,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:59:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-01-06 17:59:39,220 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2021-01-06 17:59:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:39,220 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-01-06 17:59:39,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:59:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-01-06 17:59:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:59:39,221 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:39,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:39,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:59:39,222 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-01-06 17:59:39,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:39,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244508443] [2021-01-06 17:59:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:39,253 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:39,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012683425] [2021-01-06 17:59:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:39,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:59:39,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:39,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244508443] [2021-01-06 17:59:39,540 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:39,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012683425] [2021-01-06 17:59:39,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:59:39,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:59:39,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365037469] [2021-01-06 17:59:39,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:59:39,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:39,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:59:39,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:59:39,545 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2021-01-06 17:59:39,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:39,667 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-01-06 17:59:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:59:39,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 17:59:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:39,669 INFO L225 Difference]: With dead ends: 31 [2021-01-06 17:59:39,670 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 17:59:39,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:59:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 17:59:39,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-01-06 17:59:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:59:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-01-06 17:59:39,678 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2021-01-06 17:59:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:39,679 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-01-06 17:59:39,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:59:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-01-06 17:59:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:59:39,680 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:39,680 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:39,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:59:39,895 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:39,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2021-01-06 17:59:39,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:39,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661779560] [2021-01-06 17:59:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:39,912 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:39,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786866785] [2021-01-06 17:59:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:39,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:59:39,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:40,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661779560] [2021-01-06 17:59:40,052 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:40,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786866785] [2021-01-06 17:59:40,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:59:40,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:59:40,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214682615] [2021-01-06 17:59:40,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:59:40,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:40,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:59:40,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:59:40,055 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2021-01-06 17:59:40,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:40,247 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-01-06 17:59:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:59:40,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 17:59:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:40,251 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:59:40,251 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:59:40,252 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 [2021-01-06 17:59:40,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:59:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-01-06 17:59:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:59:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-01-06 17:59:40,266 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2021-01-06 17:59:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:40,269 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-01-06 17:59:40,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:59:40,270 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-01-06 17:59:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:59:40,271 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:40,271 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:40,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:40,489 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:40,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2021-01-06 17:59:40,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:40,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995901939] [2021-01-06 17:59:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:40,505 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:40,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355219493] [2021-01-06 17:59:40,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:40,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:59:40,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:59:40,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:59:40,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:40,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995901939] [2021-01-06 17:59:40,802 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:40,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355219493] [2021-01-06 17:59:40,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:59:40,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:59:40,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971246782] [2021-01-06 17:59:40,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:59:40,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:59:40,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:59:40,812 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2021-01-06 17:59:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:40,970 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-01-06 17:59:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:59:40,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-01-06 17:59:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:40,972 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:59:40,972 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 17:59:40,973 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 [2021-01-06 17:59:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 17:59:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-01-06 17:59:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:59:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 17:59:40,981 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2021-01-06 17:59:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:40,981 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 17:59:40,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:59:40,982 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 17:59:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:59:40,982 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:40,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:41,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:41,198 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:41,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:41,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2052638844, now seen corresponding path program 1 times [2021-01-06 17:59:41,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:41,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954777578] [2021-01-06 17:59:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:41,219 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:41,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669696286] [2021-01-06 17:59:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:41,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:59:41,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:41,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:59:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:41,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954777578] [2021-01-06 17:59:41,413 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:41,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669696286] [2021-01-06 17:59:41,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:59:41,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:59:41,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623977664] [2021-01-06 17:59:41,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:59:41,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:59:41,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:59:41,415 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2021-01-06 17:59:41,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:41,668 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-01-06 17:59:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:59:41,668 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-01-06 17:59:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:41,669 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:59:41,669 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:59:41,670 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 [2021-01-06 17:59:41,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:59:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 17:59:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:59:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 17:59:41,677 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 13 [2021-01-06 17:59:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:41,677 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 17:59:41,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:59:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 17:59:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:59:41,678 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:41,679 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:41,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:41,894 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2021-01-06 17:59:41,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:41,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697050075] [2021-01-06 17:59:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:41,908 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:41,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112552037] [2021-01-06 17:59:41,909 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