/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/sqrt1-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:14:52,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:14:52,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:14:52,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:14:52,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:14:52,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:14:52,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:14:52,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:14:52,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:14:52,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:14:52,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:14:52,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:14:52,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:14:52,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:14:52,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:14:52,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:14:52,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:14:52,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:14:52,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:14:52,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:14:52,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:14:52,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:14:52,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:14:52,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:14:52,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:14:52,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:14:52,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:14:52,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:14:52,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:14:52,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:14:52,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:14:52,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:14:52,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:14:52,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:14:52,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:14:52,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:14:52,886 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 08:14:52,935 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:14:52,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:14:52,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:14:52,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:14:52,941 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:14:52,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:14:52,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:14:52,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:14:52,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:14:52,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:14:52,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:14:52,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:14:52,943 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:14:52,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:14:52,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:14:52,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:14:52,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:14:52,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:14:52,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:14:52,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:14:52,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:14:52,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:14:52,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:14:52,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:14:52,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:14:52,946 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:14:53,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:14:53,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:14:53,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:14:53,452 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:14:53,453 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:14:53,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2020-12-23 08:14:53,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bf65cb932/fa354ccd099d4e44ad5f835f6a328162/FLAG7bec55072 [2020-12-23 08:14:54,310 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:14:54,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2020-12-23 08:14:54,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bf65cb932/fa354ccd099d4e44ad5f835f6a328162/FLAG7bec55072 [2020-12-23 08:14:54,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bf65cb932/fa354ccd099d4e44ad5f835f6a328162 [2020-12-23 08:14:54,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:14:54,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:14:54,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:14:54,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:14:54,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:14:54,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:14:54" (1/1) ... [2020-12-23 08:14:54,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d8aa0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54, skipping insertion in model container [2020-12-23 08:14:54,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:14:54" (1/1) ... [2020-12-23 08:14:54,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:14:54,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:14:54,864 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/sqrt1-ll_unwindbound10.c[520,533] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2020-12-23 08:14:54,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:14:54,899 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:14:54,914 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/sqrt1-ll_unwindbound10.c[520,533] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2020-12-23 08:14:54,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:14:54,940 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:14:54,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54 WrapperNode [2020-12-23 08:14:54,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:14:54,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:14:54,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:14:54,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:14:54,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54" (1/1) ... [2020-12-23 08:14:54,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54" (1/1) ... [2020-12-23 08:14:54,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:14:54,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:14:54,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:14:54,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:14:54,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54" (1/1) ... [2020-12-23 08:14:54,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54" (1/1) ... [2020-12-23 08:14:54,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54" (1/1) ... [2020-12-23 08:14:54,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54" (1/1) ... [2020-12-23 08:14:55,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54" (1/1) ... [2020-12-23 08:14:55,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54" (1/1) ... [2020-12-23 08:14:55,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54" (1/1) ... [2020-12-23 08:14:55,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:14:55,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:14:55,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:14:55,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:14:55,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:14:55,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:14:55,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:14:55,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:14:55,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:14:55,454 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:14:55,455 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 08:14:55,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:14:55 BoogieIcfgContainer [2020-12-23 08:14:55,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:14:55,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:14:55,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:14:55,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:14:55,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:14:54" (1/3) ... [2020-12-23 08:14:55,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379f84e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:14:55, skipping insertion in model container [2020-12-23 08:14:55,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:54" (2/3) ... [2020-12-23 08:14:55,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379f84e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:14:55, skipping insertion in model container [2020-12-23 08:14:55,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:14:55" (3/3) ... [2020-12-23 08:14:55,497 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.c [2020-12-23 08:14:55,518 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:14:55,535 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-23 08:14:55,578 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-23 08:14:55,609 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:14:55,609 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:14:55,609 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:14:55,609 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:14:55,609 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:14:55,610 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:14:55,610 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:14:55,610 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:14:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-23 08:14:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 08:14:55,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:14:55,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 08:14:55,636 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:14:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:14:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2020-12-23 08:14:55,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:14:55,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315168598] [2020-12-23 08:14:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:14:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:14:55,830 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 08:14:55,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315168598] [2020-12-23 08:14:55,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:14:55,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:14:55,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714259827] [2020-12-23 08:14:55,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:14:55,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:14:55,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:14:55,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:14:55,860 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-23 08:14:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:14:55,885 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-12-23 08:14:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:14:55,887 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 08:14:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:14:55,898 INFO L225 Difference]: With dead ends: 62 [2020-12-23 08:14:55,898 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 08:14:55,902 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 08:14:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 08:14:55,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 08:14:55,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:14:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-23 08:14:55,947 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2020-12-23 08:14:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:14:55,948 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-23 08:14:55,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:14:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-23 08:14:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 08:14:55,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:14:55,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 08:14:55,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:14:55,950 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:14:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:14:55,951 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-23 08:14:55,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:14:55,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344922456] [2020-12-23 08:14:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:14:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:14:56,068 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 08:14:56,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344922456] [2020-12-23 08:14:56,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:14:56,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 08:14:56,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752258876] [2020-12-23 08:14:56,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 08:14:56,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:14:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 08:14:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:14:56,074 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2020-12-23 08:14:56,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:14:56,294 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-12-23 08:14:56,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 08:14:56,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 08:14:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:14:56,298 INFO L225 Difference]: With dead ends: 55 [2020-12-23 08:14:56,298 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 08:14:56,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:14:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 08:14:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-12-23 08:14:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 08:14:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-23 08:14:56,331 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2020-12-23 08:14:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:14:56,332 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-23 08:14:56,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 08:14:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-23 08:14:56,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:14:56,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:14:56,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:14:56,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 08:14:56,337 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:14:56,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:14:56,341 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2020-12-23 08:14:56,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:14:56,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970343315] [2020-12-23 08:14:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:14:56,389 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:14:56,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278412356] [2020-12-23 08:14:56,389 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 08:14:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:14:56,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 08:14:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:14:56,633 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 08:14:56,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970343315] [2020-12-23 08:14:56,634 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:14:56,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278412356] [2020-12-23 08:14:56,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:14:56,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 08:14:56,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499400654] [2020-12-23 08:14:56,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:14:56,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:14:56,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:14:56,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:14:56,638 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-12-23 08:14:56,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:14:56,816 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-12-23 08:14:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 08:14:56,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 08:14:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:14:56,818 INFO L225 Difference]: With dead ends: 54 [2020-12-23 08:14:56,819 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 08:14:56,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:14:56,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 08:14:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-23 08:14:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 08:14:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 08:14:56,828 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 8 [2020-12-23 08:14:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:14:56,828 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 08:14:56,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:14:56,829 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 08:14:56,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 08:14:56,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:14:56,830 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:14:57,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 08:14:57,045 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:14:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:14:57,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1265507748, now seen corresponding path program 1 times [2020-12-23 08:14:57,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:14:57,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439214599] [2020-12-23 08:14:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:14:57,073 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:14:57,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761686133] [2020-12-23 08:14:57,074 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 08:14:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:14:57,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 08:14:57,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:14:57,318 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 08:14:57,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439214599] [2020-12-23 08:14:57,319 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:14:57,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761686133] [2020-12-23 08:14:57,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:14:57,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 08:14:57,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839557226] [2020-12-23 08:14:57,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:14:57,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:14:57,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:14:57,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:14:57,324 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 5 states. [2020-12-23 08:14:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:14:57,500 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-23 08:14:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:14:57,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 08:14:57,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:14:57,502 INFO L225 Difference]: With dead ends: 62 [2020-12-23 08:14:57,502 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 08:14:57,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:14:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 08:14:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2020-12-23 08:14:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 08:14:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 08:14:57,513 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 14 [2020-12-23 08:14:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:14:57,513 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 08:14:57,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:14:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 08:14:57,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:14:57,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:14:57,515 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:14:57,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:14:57,729 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:14:57,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:14:57,731 INFO L82 PathProgramCache]: Analyzing trace with hash -677045505, now seen corresponding path program 1 times [2020-12-23 08:14:57,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:14:57,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638757084] [2020-12-23 08:14:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:14:57,744 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:14:57,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734758363] [2020-12-23 08:14:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:14:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:14:57,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 08:14:57,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:14:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:14:58,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638757084] [2020-12-23 08:14:58,013 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:14:58,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734758363] [2020-12-23 08:14:58,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:14:58,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:14:58,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274621209] [2020-12-23 08:14:58,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:14:58,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:14:58,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:14:58,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:14:58,016 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 7 states. [2020-12-23 08:14:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:14:58,246 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-12-23 08:14:58,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:14:58,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 08:14:58,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:14:58,248 INFO L225 Difference]: With dead ends: 61 [2020-12-23 08:14:58,248 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 08:14:58,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:14:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 08:14:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-12-23 08:14:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 08:14:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-23 08:14:58,258 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 16 [2020-12-23 08:14:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:14:58,259 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-23 08:14:58,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:14:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-23 08:14:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 08:14:58,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:14:58,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 08:14:58,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:14:58,475 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:14:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:14:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1785416430, now seen corresponding path program 2 times [2020-12-23 08:14:58,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:14:58,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216092284] [2020-12-23 08:14:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:14:58,491 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:14:58,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258565640] [2020-12-23 08:14:58,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:14:58,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:14:58,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:14:58,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 08:14:58,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:14:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:14:58,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216092284] [2020-12-23 08:14:58,648 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:14:58,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258565640] [2020-12-23 08:14:58,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:14:58,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:14:58,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126158632] [2020-12-23 08:14:58,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:14:58,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:14:58,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:14:58,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:14:58,656 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 6 states. [2020-12-23 08:14:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:14:58,819 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-12-23 08:14:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:14:58,820 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-23 08:14:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:14:58,824 INFO L225 Difference]: With dead ends: 70 [2020-12-23 08:14:58,824 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 08:14:58,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:14:58,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 08:14:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-12-23 08:14:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 08:14:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-12-23 08:14:58,853 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 22 [2020-12-23 08:14:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:14:58,854 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-12-23 08:14:58,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:14:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-12-23 08:14:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 08:14:58,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:14:58,856 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 08:14:59,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:14:59,071 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:14:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:14:59,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2093393681, now seen corresponding path program 2 times [2020-12-23 08:14:59,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:14:59,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411953859] [2020-12-23 08:14:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:14:59,087 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:14:59,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761746545] [2020-12-23 08:14:59,088 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:14:59,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:14:59,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:14:59,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 08:14:59,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:14:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:14:59,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411953859] [2020-12-23 08:14:59,283 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:14:59,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761746545] [2020-12-23 08:14:59,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:14:59,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:14:59,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743264817] [2020-12-23 08:14:59,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:14:59,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:14:59,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:14:59,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:14:59,286 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 7 states. [2020-12-23 08:14:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:14:59,470 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-12-23 08:14:59,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 08:14:59,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-23 08:14:59,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:14:59,474 INFO L225 Difference]: With dead ends: 67 [2020-12-23 08:14:59,474 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 08:14:59,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:14:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 08:14:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-12-23 08:14:59,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 08:14:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 08:14:59,501 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 24 [2020-12-23 08:14:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:14:59,501 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 08:14:59,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:14:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 08:14:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 08:14:59,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:14:59,503 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-12-23 08:14:59,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 08:14:59,718 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:14:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:14:59,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1706788820, now seen corresponding path program 1 times [2020-12-23 08:14:59,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:14:59,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140167320] [2020-12-23 08:14:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:14:59,732 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:14:59,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862264607] [2020-12-23 08:14:59,733 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:14:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:14:59,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 08:14:59,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:14:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:14:59,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140167320] [2020-12-23 08:14:59,964 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:14:59,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862264607] [2020-12-23 08:14:59,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:14:59,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:14:59,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153292620] [2020-12-23 08:14:59,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:14:59,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:14:59,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:14:59,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:14:59,966 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 8 states. [2020-12-23 08:15:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:15:00,118 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-12-23 08:15:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:15:00,118 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-23 08:15:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:15:00,119 INFO L225 Difference]: With dead ends: 65 [2020-12-23 08:15:00,119 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 08:15:00,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-23 08:15:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 08:15:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-23 08:15:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 08:15:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 08:15:00,126 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 26 [2020-12-23 08:15:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:15:00,126 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 08:15:00,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:15:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 08:15:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 08:15:00,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:00,128 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2020-12-23 08:15:00,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:15:00,341 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1822162560, now seen corresponding path program 3 times [2020-12-23 08:15:00,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:00,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748876896] [2020-12-23 08:15:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:00,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:15:00,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555441063] [2020-12-23 08:15:00,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:15:00,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 08:15:00,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:15:00,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 08:15:00,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:15:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 08:15:00,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748876896] [2020-12-23 08:15:00,498 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:15:00,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555441063] [2020-12-23 08:15:00,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:15:00,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 08:15:00,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588319379] [2020-12-23 08:15:00,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:15:00,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:00,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:15:00,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:15:00,501 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 5 states. [2020-12-23 08:15:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:15:00,565 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 08:15:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 08:15:00,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-23 08:15:00,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:15:00,566 INFO L225 Difference]: With dead ends: 52 [2020-12-23 08:15:00,566 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 08:15:00,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:15:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 08:15:00,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 08:15:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 08:15:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 08:15:00,575 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 30 [2020-12-23 08:15:00,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:15:00,575 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 08:15:00,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:15:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 08:15:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 08:15:00,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:00,576 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2020-12-23 08:15:00,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:15:00,791 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1248592163, now seen corresponding path program 3 times [2020-12-23 08:15:00,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:00,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109796906] [2020-12-23 08:15:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:00,804 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:15:00,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112488397] [2020-12-23 08:15:00,805 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:15:00,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 08:15:00,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:15:00,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 08:15:00,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:15:02,967 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* 2 c_ULTIMATE.start_main_~a~0))) (and (= (+ .cse0 1) c_ULTIMATE.start_main_~t~0) (let ((.cse1 (= (+ (* 2 c_ULTIMATE.start_main_~t~0) (* c_ULTIMATE.start_main_~t~0 c_ULTIMATE.start_main_~t~0) 1) (* 4 c_ULTIMATE.start_main_~s~0)))) (or (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse1)) (and (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse1))) (= c_ULTIMATE.start_main_~s~0 (+ (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0) .cse0 1)))) is different from false [2020-12-23 08:15:09,164 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 18 [2020-12-23 08:15:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 08:15:09,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109796906] [2020-12-23 08:15:09,203 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:15:09,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112488397] [2020-12-23 08:15:09,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:15:09,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 08:15:09,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435566871] [2020-12-23 08:15:09,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 08:15:09,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:09,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 08:15:09,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=51, Unknown=2, NotChecked=14, Total=90 [2020-12-23 08:15:09,205 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 10 states. [2020-12-23 08:15:21,304 WARN L197 SmtUtils]: Spent 12.09 s on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2020-12-23 08:16:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:16:21,905 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-23 08:16:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:16:21,906 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-23 08:16:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:16:21,907 INFO L225 Difference]: With dead ends: 55 [2020-12-23 08:16:21,907 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 08:16:21,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=4, NotChecked=20, Total=156 [2020-12-23 08:16:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 08:16:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-23 08:16:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 08:16:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-23 08:16:21,926 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 32 [2020-12-23 08:16:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:16:21,926 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-23 08:16:21,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 08:16:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-23 08:16:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 08:16:21,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:16:21,929 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:16:22,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 08:16:22,141 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:16:22,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:16:22,142 INFO L82 PathProgramCache]: Analyzing trace with hash 26039134, now seen corresponding path program 1 times [2020-12-23 08:16:22,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:16:22,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669981588] [2020-12-23 08:16:22,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:16:22,154 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:16:22,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141840650] [2020-12-23 08:16:22,154 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:16:22,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 08:16:22,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:16:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:16:22,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669981588] [2020-12-23 08:16:22,315 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:16:22,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141840650] [2020-12-23 08:16:22,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:16:22,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:16:22,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964724626] [2020-12-23 08:16:22,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:16:22,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:16:22,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:16:22,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:16:22,317 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 7 states. [2020-12-23 08:16:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:16:22,375 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-12-23 08:16:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:16:22,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-12-23 08:16:22,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:16:22,376 INFO L225 Difference]: With dead ends: 62 [2020-12-23 08:16:22,376 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 08:16:22,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:16:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 08:16:22,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 08:16:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 08:16:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 08:16:22,385 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 33 [2020-12-23 08:16:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:16:22,386 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 08:16:22,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:16:22,386 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 08:16:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 08:16:22,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:16:22,387 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2020-12-23 08:16:22,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:22,588 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:16:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:16:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1601348966, now seen corresponding path program 2 times [2020-12-23 08:16:22,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:16:22,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901563273] [2020-12-23 08:16:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:16:22,607 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:16:22,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614067532] [2020-12-23 08:16:22,613 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:22,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 08:16:22,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:16:22,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 08:16:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:16:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 08:16:22,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901563273] [2020-12-23 08:16:22,851 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:16:22,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614067532] [2020-12-23 08:16:22,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:16:22,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 08:16:22,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514492650] [2020-12-23 08:16:22,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:16:22,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:16:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:16:22,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:16:22,853 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 7 states. [2020-12-23 08:16:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:16:35,176 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 08:16:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 08:16:35,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-23 08:16:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:16:35,178 INFO L225 Difference]: With dead ends: 52 [2020-12-23 08:16:35,179 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 08:16:35,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 08:16:35,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 08:16:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 08:16:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 08:16:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-23 08:16:35,188 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 34 [2020-12-23 08:16:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:16:35,188 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-23 08:16:35,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:16:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-23 08:16:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 08:16:35,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:16:35,189 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:16:35,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:35,394 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:16:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:16:35,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1133040244, now seen corresponding path program 2 times [2020-12-23 08:16:35,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:16:35,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419614836] [2020-12-23 08:16:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:16:35,413 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:16:35,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855076369] [2020-12-23 08:16:35,419 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:35,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:16:35,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:16:35,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 08:16:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:16:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:16:35,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419614836] [2020-12-23 08:16:35,591 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:16:35,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855076369] [2020-12-23 08:16:35,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:16:35,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:16:35,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207907888] [2020-12-23 08:16:35,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:16:35,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:16:35,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:16:35,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:16:35,593 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 8 states. [2020-12-23 08:16:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:16:35,661 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-12-23 08:16:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 08:16:35,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-23 08:16:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:16:35,662 INFO L225 Difference]: With dead ends: 76 [2020-12-23 08:16:35,663 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 08:16:35,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-23 08:16:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 08:16:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-12-23 08:16:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 08:16:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-23 08:16:35,673 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 41 [2020-12-23 08:16:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:16:35,673 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-23 08:16:35,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:16:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-23 08:16:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 08:16:35,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:16:35,675 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:16:35,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 08:16:35,888 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:16:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:16:35,889 INFO L82 PathProgramCache]: Analyzing trace with hash -977613196, now seen corresponding path program 1 times [2020-12-23 08:16:35,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:16:35,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118820792] [2020-12-23 08:16:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:16:35,898 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:16:35,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987320405] [2020-12-23 08:16:35,899 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:16:35,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 08:16:35,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:16:36,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118820792] [2020-12-23 08:16:36,037 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:16:36,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987320405] [2020-12-23 08:16:36,037 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 08:16:36,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:16:36,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 08:16:36,042 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 08:16:36,043 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 08:16:36,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 08:16:36,289 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 08:16:36,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 08:16:36 BoogieIcfgContainer [2020-12-23 08:16:36,289 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 08:16:36,290 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 08:16:36,290 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 08:16:36,290 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 08:16:36,291 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:14:55" (3/4) ... [2020-12-23 08:16:36,295 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 08:16:36,295 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 08:16:36,299 INFO L168 Benchmark]: Toolchain (without parser) took 101637.24 ms. Allocated memory was 163.6 MB in the beginning and 208.7 MB in the end (delta: 45.1 MB). Free memory was 138.3 MB in the beginning and 133.6 MB in the end (delta: 4.7 MB). Peak memory consumption was 51.3 MB. Max. memory is 8.0 GB. [2020-12-23 08:16:36,299 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 163.6 MB. Free memory is still 135.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:16:36,302 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.59 ms. Allocated memory is still 163.6 MB. Free memory was 138.0 MB in the beginning and 128.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 08:16:36,306 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.59 ms. Allocated memory is still 163.6 MB. Free memory was 128.1 MB in the beginning and 126.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 08:16:36,306 INFO L168 Benchmark]: Boogie Preprocessor took 27.81 ms. Allocated memory is still 163.6 MB. Free memory was 126.6 MB in the beginning and 125.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:16:36,306 INFO L168 Benchmark]: RCFGBuilder took 457.79 ms. Allocated memory is still 163.6 MB. Free memory was 125.5 MB in the beginning and 111.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 08:16:36,310 INFO L168 Benchmark]: TraceAbstraction took 100815.94 ms. Allocated memory was 163.6 MB in the beginning and 208.7 MB in the end (delta: 45.1 MB). Free memory was 110.6 MB in the beginning and 134.1 MB in the end (delta: -23.6 MB). Peak memory consumption was 21.9 MB. Max. memory is 8.0 GB. [2020-12-23 08:16:36,311 INFO L168 Benchmark]: Witness Printer took 5.01 ms. Allocated memory is still 208.7 MB. Free memory was 134.1 MB in the beginning and 133.6 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:16:36,316 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 163.6 MB. Free memory is still 135.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 277.59 ms. Allocated memory is still 163.6 MB. Free memory was 138.0 MB in the beginning and 128.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.59 ms. Allocated memory is still 163.6 MB. Free memory was 128.1 MB in the beginning and 126.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.81 ms. Allocated memory is still 163.6 MB. Free memory was 126.6 MB in the beginning and 125.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 457.79 ms. Allocated memory is still 163.6 MB. Free memory was 125.5 MB in the beginning and 111.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 100815.94 ms. Allocated memory was 163.6 MB in the beginning and 208.7 MB in the end (delta: 45.1 MB). Free memory was 110.6 MB in the beginning and 134.1 MB in the end (delta: -23.6 MB). Peak memory consumption was 21.9 MB. Max. memory is 8.0 GB. * Witness Printer took 5.01 ms. Allocated memory is still 208.7 MB. Free memory was 134.1 MB in the beginning and 133.6 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int counter = 0; [L22] int n; [L23] long long a, s, t; [L24] n = __VERIFIER_nondet_int() [L26] a = 0 [L27] s = 1 [L28] t = 1 [L30] EXPR counter++ [L30] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] EXPR counter++ [L30] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] EXPR counter++ [L30] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] EXPR counter++ [L30] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND TRUE !(s <= n) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 100.6s, OverallIterations: 14, TraceHistogramMax: 5, AutomataDifference: 86.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 263 SDtfs, 296 SDslu, 619 SDs, 0 SdLazy, 652 SolverSat, 171 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 45.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 315 GetRequests, 224 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 49.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 62 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 9.7s InterpolantComputationTime, 292 NumberOfCodeBlocks, 236 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 279 ConstructedInterpolants, 0 QuantifiedInterpolants, 38681 SizeOfPredicates, 60 NumberOfNonLiveVariables, 1114 ConjunctsInSsa, 203 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 113/265 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...