/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/sqrt1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:21:21,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:21:21,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:21:21,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:21:21,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:21:21,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:21:21,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:21:21,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:21:21,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:21:21,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:21:21,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:21:21,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:21:21,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:21:21,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:21:21,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:21:21,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:21:21,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:21:21,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:21:21,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:21:21,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:21:21,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:21:21,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:21:21,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:21:21,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:21:21,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:21:21,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:21:21,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:21:21,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:21:21,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:21:21,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:21:21,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:21:21,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:21:21,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:21:21,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:21:21,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:21:21,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:21:21,220 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 07:21:21,267 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:21:21,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:21:21,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:21:21,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:21:21,272 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:21:21,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:21:21,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:21:21,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:21:21,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:21:21,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:21:21,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:21:21,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:21:21,275 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:21:21,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:21:21,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:21:21,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:21:21,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:21:21,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:21:21,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:21:21,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:21:21,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:21:21,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:21:21,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:21:21,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:21:21,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:21:21,278 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:21:21,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:21:21,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:21:21,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:21:21,754 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:21:21,755 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:21:21,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/sqrt1-ll.c [2020-12-23 07:21:21,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9c6666dd6/c2bd6cca306d4db69ef86b08a441efbf/FLAG105f5fc81 [2020-12-23 07:21:22,373 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:21:22,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/sqrt1-ll.c [2020-12-23 07:21:22,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9c6666dd6/c2bd6cca306d4db69ef86b08a441efbf/FLAG105f5fc81 [2020-12-23 07:21:22,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9c6666dd6/c2bd6cca306d4db69ef86b08a441efbf [2020-12-23 07:21:22,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:21:22,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:21:22,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:21:22,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:21:22,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:21:22,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:21:22" (1/1) ... [2020-12-23 07:21:22,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117f04d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:22, skipping insertion in model container [2020-12-23 07:21:22,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:21:22" (1/1) ... [2020-12-23 07:21:22,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:21:22,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:21:22,947 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/sqrt1-ll.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 07:21:22,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:21:22,977 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:21:22,993 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/sqrt1-ll.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 07:21:23,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:21:23,017 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:21:23,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23 WrapperNode [2020-12-23 07:21:23,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:21:23,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:21:23,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:21:23,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:21:23,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23" (1/1) ... [2020-12-23 07:21:23,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23" (1/1) ... [2020-12-23 07:21:23,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:21:23,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:21:23,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:21:23,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:21:23,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23" (1/1) ... [2020-12-23 07:21:23,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23" (1/1) ... [2020-12-23 07:21:23,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23" (1/1) ... [2020-12-23 07:21:23,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23" (1/1) ... [2020-12-23 07:21:23,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23" (1/1) ... [2020-12-23 07:21:23,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23" (1/1) ... [2020-12-23 07:21:23,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23" (1/1) ... [2020-12-23 07:21:23,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:21:23,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:21:23,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:21:23,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:21:23,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23" (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 07:21:23,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:21:23,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:21:23,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:21:23,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:21:23,650 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:21:23,650 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 07:21:23,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:21:23 BoogieIcfgContainer [2020-12-23 07:21:23,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:21:23,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:21:23,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:21:23,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:21:23,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:21:22" (1/3) ... [2020-12-23 07:21:23,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae5c1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:21:23, skipping insertion in model container [2020-12-23 07:21:23,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:23" (2/3) ... [2020-12-23 07:21:23,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae5c1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:21:23, skipping insertion in model container [2020-12-23 07:21:23,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:21:23" (3/3) ... [2020-12-23 07:21:23,664 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll.c [2020-12-23 07:21:23,673 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:21:23,681 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-23 07:21:23,731 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-23 07:21:23,785 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:21:23,785 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:21:23,785 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:21:23,785 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:21:23,785 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:21:23,786 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:21:23,786 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:21:23,786 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:21:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-12-23 07:21:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-23 07:21:23,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:23,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-23 07:21:23,809 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 07:21:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:23,816 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2020-12-23 07:21:23,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:23,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139098390] [2020-12-23 07:21:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:24,053 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 07:21:24,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139098390] [2020-12-23 07:21:24,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:21:24,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:21:24,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222866774] [2020-12-23 07:21:24,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:21:24,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:24,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:21:24,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:21:24,078 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2020-12-23 07:21:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:24,251 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2020-12-23 07:21:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:21:24,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-23 07:21:24,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:24,263 INFO L225 Difference]: With dead ends: 85 [2020-12-23 07:21:24,263 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 07:21:24,267 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 07:21:24,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 07:21:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-12-23 07:21:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 07:21:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-23 07:21:24,310 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 5 [2020-12-23 07:21:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:24,311 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-23 07:21:24,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:21:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-23 07:21:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:21:24,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:24,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:21:24,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:21:24,313 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 07:21:24,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:24,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1810815341, now seen corresponding path program 1 times [2020-12-23 07:21:24,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:24,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444865044] [2020-12-23 07:21:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:24,331 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:24,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266079492] [2020-12-23 07:21:24,332 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 07:21:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:24,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:21:24,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:24,543 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 07:21:24,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444865044] [2020-12-23 07:21:24,544 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:24,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266079492] [2020-12-23 07:21:24,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:21:24,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:21:24,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466630105] [2020-12-23 07:21:24,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:21:24,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:24,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:21:24,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:21:24,549 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-12-23 07:21:24,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:24,700 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-12-23 07:21:24,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:21:24,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-23 07:21:24,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:24,702 INFO L225 Difference]: With dead ends: 49 [2020-12-23 07:21:24,702 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 07:21:24,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 07:21:24,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 07:21:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-23 07:21:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 07:21:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-23 07:21:24,712 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 7 [2020-12-23 07:21:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:24,712 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-23 07:21:24,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:21:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-23 07:21:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:21:24,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:24,713 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:21:24,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:21:24,927 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 07:21:24,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:24,928 INFO L82 PathProgramCache]: Analyzing trace with hash -209387720, now seen corresponding path program 1 times [2020-12-23 07:21:24,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:24,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123000189] [2020-12-23 07:21:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:24,942 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:24,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957350879] [2020-12-23 07:21:24,942 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 07:21:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:25,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:21:25,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:21:25,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123000189] [2020-12-23 07:21:25,091 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:25,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957350879] [2020-12-23 07:21:25,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:25,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:21:25,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019164531] [2020-12-23 07:21:25,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:21:25,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:25,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:21:25,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:21:25,094 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 5 states. [2020-12-23 07:21:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:25,274 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-12-23 07:21:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:21:25,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-23 07:21:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:25,276 INFO L225 Difference]: With dead ends: 59 [2020-12-23 07:21:25,276 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 07:21:25,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 07:21:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 07:21:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-12-23 07:21:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 07:21:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-12-23 07:21:25,286 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 12 [2020-12-23 07:21:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:25,286 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-12-23 07:21:25,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:21:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-12-23 07:21:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:21:25,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:25,287 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:21:25,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:25,502 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 07:21:25,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:25,503 INFO L82 PathProgramCache]: Analyzing trace with hash 642019515, now seen corresponding path program 1 times [2020-12-23 07:21:25,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:25,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748849710] [2020-12-23 07:21:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:25,516 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:25,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446035788] [2020-12-23 07:21:25,517 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 07:21:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:21:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:21:25,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748849710] [2020-12-23 07:21:25,737 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:25,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446035788] [2020-12-23 07:21:25,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:25,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:21:25,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340790452] [2020-12-23 07:21:25,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:21:25,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:25,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:21:25,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:21:25,742 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 7 states. [2020-12-23 07:21:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:25,991 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-23 07:21:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:21:25,992 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-23 07:21:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:25,993 INFO L225 Difference]: With dead ends: 56 [2020-12-23 07:21:25,993 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 07:21:25,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 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 07:21:25,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 07:21:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-23 07:21:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:21:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-23 07:21:26,002 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 14 [2020-12-23 07:21:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:26,002 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-23 07:21:26,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:21:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-23 07:21:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:21:26,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:26,003 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 07:21:26,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:26,217 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 07:21:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:26,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1758476118, now seen corresponding path program 2 times [2020-12-23 07:21:26,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:26,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686440252] [2020-12-23 07:21:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:26,230 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:26,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493877991] [2020-12-23 07:21:26,230 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 07:21:26,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:21:26,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:21:26,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:21:26,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:21:26,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686440252] [2020-12-23 07:21:26,406 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:26,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493877991] [2020-12-23 07:21:26,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:26,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:21:26,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148523024] [2020-12-23 07:21:26,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:21:26,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:26,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:21:26,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:21:26,410 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 6 states. [2020-12-23 07:21:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:26,613 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-23 07:21:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:21:26,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-23 07:21:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:26,615 INFO L225 Difference]: With dead ends: 66 [2020-12-23 07:21:26,615 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 07:21:26,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:21:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 07:21:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2020-12-23 07:21:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 07:21:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-12-23 07:21:26,625 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 19 [2020-12-23 07:21:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:26,627 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-12-23 07:21:26,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:21:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-12-23 07:21:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:21:26,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:26,629 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 07:21:26,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:26,841 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 07:21:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:26,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1973246547, now seen corresponding path program 2 times [2020-12-23 07:21:26,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:26,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057659867] [2020-12-23 07:21:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:26,865 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:26,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941047025] [2020-12-23 07:21:26,866 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 07:21:26,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:21:26,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:21:26,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:21:26,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:21:27,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057659867] [2020-12-23 07:21:27,094 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:27,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941047025] [2020-12-23 07:21:27,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:27,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:21:27,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794312643] [2020-12-23 07:21:27,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:21:27,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:27,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:21:27,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:21:27,110 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 7 states. [2020-12-23 07:21:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:27,256 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-23 07:21:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:21:27,257 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-23 07:21:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:27,258 INFO L225 Difference]: With dead ends: 62 [2020-12-23 07:21:27,258 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 07:21:27,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 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 07:21:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 07:21:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-12-23 07:21:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 07:21:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-23 07:21:27,268 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 21 [2020-12-23 07:21:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:27,268 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-23 07:21:27,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:21:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-23 07:21:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:21:27,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:27,269 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-12-23 07:21:27,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:21:27,482 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 07:21:27,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:27,484 INFO L82 PathProgramCache]: Analyzing trace with hash 2085769040, now seen corresponding path program 1 times [2020-12-23 07:21:27,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:27,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734616146] [2020-12-23 07:21:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:27,499 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:27,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138819818] [2020-12-23 07:21:27,500 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 07:21:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:27,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:21:27,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:21:27,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734616146] [2020-12-23 07:21:27,653 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:27,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138819818] [2020-12-23 07:21:27,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:27,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:21:27,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216826] [2020-12-23 07:21:27,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:21:27,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:27,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:21:27,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:21:27,655 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 8 states. [2020-12-23 07:21:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:27,816 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-12-23 07:21:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:21:27,817 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-23 07:21:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:27,818 INFO L225 Difference]: With dead ends: 59 [2020-12-23 07:21:27,818 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 07:21:27,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 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 07:21:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 07:21:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 07:21:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 07:21:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-23 07:21:27,836 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 23 [2020-12-23 07:21:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:27,837 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-23 07:21:27,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:21:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-23 07:21:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:21:27,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:27,839 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2020-12-23 07:21:28,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:28,053 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 07:21:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:28,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1858525944, now seen corresponding path program 3 times [2020-12-23 07:21:28,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:28,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105185531] [2020-12-23 07:21:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:28,069 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:28,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082668799] [2020-12-23 07:21:28,070 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 07:21:28,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:21:28,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:21:28,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:21:28,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 07:21:28,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105185531] [2020-12-23 07:21:28,237 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:28,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082668799] [2020-12-23 07:21:28,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:28,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:21:28,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173343489] [2020-12-23 07:21:28,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:21:28,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:21:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:21:28,242 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 6 states. [2020-12-23 07:21:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:28,332 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-23 07:21:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:21:28,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-23 07:21:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:28,334 INFO L225 Difference]: With dead ends: 48 [2020-12-23 07:21:28,334 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 07:21:28,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:21:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 07:21:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 07:21:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 07:21:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-23 07:21:28,342 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 26 [2020-12-23 07:21:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:28,342 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-23 07:21:28,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:21:28,342 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-23 07:21:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:21:28,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:28,343 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2020-12-23 07:21:28,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:28,550 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 07:21:28,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:28,551 INFO L82 PathProgramCache]: Analyzing trace with hash -662807429, now seen corresponding path program 3 times [2020-12-23 07:21:28,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:28,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120812215] [2020-12-23 07:21:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:28,562 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:28,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224901710] [2020-12-23 07:21:28,562 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 07:21:28,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:21:28,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:21:28,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:21:28,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 07:21:28,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120812215] [2020-12-23 07:21:28,699 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:28,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224901710] [2020-12-23 07:21:28,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:28,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:21:28,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854526754] [2020-12-23 07:21:28,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:21:28,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:28,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:21:28,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:21:28,701 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 6 states. [2020-12-23 07:21:31,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:31,110 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-23 07:21:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:21:31,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-23 07:21:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:31,112 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:21:31,112 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 07:21:31,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:21:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 07:21:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 07:21:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 07:21:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-23 07:21:31,126 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 28 [2020-12-23 07:21:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:31,127 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-23 07:21:31,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:21:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-23 07:21:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:21:31,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:31,128 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2020-12-23 07:21:31,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:21:31,344 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 07:21:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1302623586, now seen corresponding path program 2 times [2020-12-23 07:21:31,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:31,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307176427] [2020-12-23 07:21:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:31,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:31,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019604624] [2020-12-23 07:21:31,355 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 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 07:21:31,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 07:21:31,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:21:31,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:21:31,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 07:21:31,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307176427] [2020-12-23 07:21:31,592 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:31,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019604624] [2020-12-23 07:21:31,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:21:31,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 07:21:31,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856256918] [2020-12-23 07:21:31,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:21:31,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:31,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:21:31,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:21:31,594 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 7 states. [2020-12-23 07:21:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:41,110 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-23 07:21:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:21:41,111 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-12-23 07:21:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:41,112 INFO L225 Difference]: With dead ends: 40 [2020-12-23 07:21:41,112 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 07:21:41,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:21:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 07:21:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 07:21:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 07:21:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-23 07:21:41,121 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 30 [2020-12-23 07:21:41,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:41,122 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-23 07:21:41,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:21:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-23 07:21:41,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:21:41,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:41,123 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:21:41,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:41,329 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 07:21:41,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:41,331 INFO L82 PathProgramCache]: Analyzing trace with hash -846301541, now seen corresponding path program 1 times [2020-12-23 07:21:41,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:41,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436280040] [2020-12-23 07:21:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:41,342 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:41,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796583297] [2020-12-23 07:21:41,343 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 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 07:21:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:41,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:21:41,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:41,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436280040] [2020-12-23 07:21:41,500 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:41,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796583297] [2020-12-23 07:21:41,500 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 07:21:41,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:21:41,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:21:41,501 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:21:41,501 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:21:41,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:41,743 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:21:41,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:21:41 BoogieIcfgContainer [2020-12-23 07:21:41,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:21:41,745 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:21:41,745 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:21:41,745 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:21:41,746 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:21:23" (3/4) ... [2020-12-23 07:21:41,752 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:21:41,752 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:21:41,755 INFO L168 Benchmark]: Toolchain (without parser) took 18993.29 ms. Allocated memory was 169.9 MB in the beginning and 204.5 MB in the end (delta: 34.6 MB). Free memory was 145.2 MB in the beginning and 179.8 MB in the end (delta: -34.7 MB). Peak memory consumption was 524.3 kB. Max. memory is 8.0 GB. [2020-12-23 07:21:41,757 INFO L168 Benchmark]: CDTParser took 3.27 ms. Allocated memory is still 169.9 MB. Free memory is still 149.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:21:41,759 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.60 ms. Allocated memory is still 169.9 MB. Free memory was 144.9 MB in the beginning and 135.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:21:41,759 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.87 ms. Allocated memory is still 169.9 MB. Free memory was 135.0 MB in the beginning and 133.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:21:41,760 INFO L168 Benchmark]: Boogie Preprocessor took 53.10 ms. Allocated memory is still 169.9 MB. Free memory was 133.6 MB in the beginning and 132.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:21:41,761 INFO L168 Benchmark]: RCFGBuilder took 527.09 ms. Allocated memory is still 169.9 MB. Free memory was 132.4 MB in the beginning and 118.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-23 07:21:41,761 INFO L168 Benchmark]: TraceAbstraction took 18088.36 ms. Allocated memory was 169.9 MB in the beginning and 204.5 MB in the end (delta: 34.6 MB). Free memory was 117.9 MB in the beginning and 180.4 MB in the end (delta: -62.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:21:41,762 INFO L168 Benchmark]: Witness Printer took 7.80 ms. Allocated memory is still 204.5 MB. Free memory was 180.4 MB in the beginning and 179.8 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:21:41,765 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.27 ms. Allocated memory is still 169.9 MB. Free memory is still 149.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 256.60 ms. Allocated memory is still 169.9 MB. Free memory was 144.9 MB in the beginning and 135.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.87 ms. Allocated memory is still 169.9 MB. Free memory was 135.0 MB in the beginning and 133.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.10 ms. Allocated memory is still 169.9 MB. Free memory was 133.6 MB in the beginning and 132.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 527.09 ms. Allocated memory is still 169.9 MB. Free memory was 132.4 MB in the beginning and 118.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18088.36 ms. Allocated memory was 169.9 MB in the beginning and 204.5 MB in the end (delta: 34.6 MB). Free memory was 117.9 MB in the beginning and 180.4 MB in the end (delta: -62.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 7.80 ms. Allocated memory is still 204.5 MB. Free memory was 180.4 MB in the beginning and 179.8 MB in the end (delta: 522.2 kB). There was no memory consumed. 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: [L21] int n; [L22] long long a, s, t; [L23] n = __VERIFIER_nondet_int() [L25] a = 0 [L26] s = 1 [L27] t = 1 [L29] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(s <= n)) [L38] a = a + 1 [L39] t = t + 2 [L40] s = s + t [L29] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(s <= n)) [L38] a = a + 1 [L39] t = t + 2 [L40] s = s + t [L29] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(s <= n)) [L38] a = a + 1 [L39] t = t + 2 [L40] s = s + t [L29] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L35] 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, 31 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 17.9s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 13.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 160 SDtfs, 219 SDslu, 423 SDs, 0 SdLazy, 669 SolverSat, 129 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 12.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=6, 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, 10 MinimizatonAttempts, 45 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 185 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 22272 SizeOfPredicates, 61 NumberOfNonLiveVariables, 714 ConjunctsInSsa, 194 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 92/150 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...