/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/ps2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:04:15,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:04:15,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:04:16,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:04:16,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:04:16,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:04:16,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:04:16,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:04:16,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:04:16,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:04:16,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:04:16,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:04:16,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:04:16,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:04:16,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:04:16,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:04:16,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:04:16,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:04:16,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:04:16,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:04:16,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:04:16,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:04:16,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:04:16,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:04:16,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:04:16,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:04:16,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:04:16,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:04:16,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:04:16,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:04:16,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:04:16,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:04:16,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:04:16,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:04:16,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:04:16,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:04:16,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 08:04:16,144 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:04:16,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:04:16,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:04:16,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:04:16,148 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:04:16,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:04:16,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:04:16,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:04:16,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:04:16,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:04:16,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:04:16,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:04:16,151 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:04:16,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:04:16,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:04:16,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:04:16,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:04:16,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:04:16,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:04:16,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:04:16,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:04:16,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:04:16,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:04:16,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:04:16,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:04:16,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:04:16,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:04:16,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:04:16,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:04:16,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:04:16,620 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:04:16,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound100.c [2020-12-23 08:04:16,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2672c4fad/9d6f30980c364ab090ce01c5d8e3c3b0/FLAG2f89a05b3 [2020-12-23 08:04:17,340 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:04:17,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound100.c [2020-12-23 08:04:17,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2672c4fad/9d6f30980c364ab090ce01c5d8e3c3b0/FLAG2f89a05b3 [2020-12-23 08:04:17,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2672c4fad/9d6f30980c364ab090ce01c5d8e3c3b0 [2020-12-23 08:04:17,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:04:17,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:04:17,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:04:17,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:04:17,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:04:17,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:04:17" (1/1) ... [2020-12-23 08:04:17,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65eca106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17, skipping insertion in model container [2020-12-23 08:04:17,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:04:17" (1/1) ... [2020-12-23 08:04:17,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:04:17,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:04:17,886 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/ps2-ll_valuebound100.c[454,467] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 08:04:17,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:04:17,911 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:04:17,926 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/ps2-ll_valuebound100.c[454,467] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 08:04:17,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:04:17,947 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:04:17,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17 WrapperNode [2020-12-23 08:04:17,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:04:17,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:04:17,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:04:17,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:04:17,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17" (1/1) ... [2020-12-23 08:04:17,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17" (1/1) ... [2020-12-23 08:04:17,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:04:17,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:04:17,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:04:17,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:04:17,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17" (1/1) ... [2020-12-23 08:04:17,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17" (1/1) ... [2020-12-23 08:04:17,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17" (1/1) ... [2020-12-23 08:04:17,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17" (1/1) ... [2020-12-23 08:04:18,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17" (1/1) ... [2020-12-23 08:04:18,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17" (1/1) ... [2020-12-23 08:04:18,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17" (1/1) ... [2020-12-23 08:04:18,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:04:18,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:04:18,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:04:18,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:04:18,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17" (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 08:04:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:04:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:04:18,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:04:18,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:04:18,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:04:18,568 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 08:04:18,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:04:18 BoogieIcfgContainer [2020-12-23 08:04:18,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:04:18,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:04:18,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:04:18,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:04:18,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:04:17" (1/3) ... [2020-12-23 08:04:18,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175b0cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:04:18, skipping insertion in model container [2020-12-23 08:04:18,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:04:17" (2/3) ... [2020-12-23 08:04:18,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175b0cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:04:18, skipping insertion in model container [2020-12-23 08:04:18,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:04:18" (3/3) ... [2020-12-23 08:04:18,613 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound100.c [2020-12-23 08:04:18,627 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:04:18,639 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 08:04:18,661 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 08:04:18,688 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:04:18,688 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:04:18,688 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:04:18,688 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:04:18,689 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:04:18,689 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:04:18,689 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:04:18,689 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:04:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 08:04:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 08:04:18,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:18,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:18,713 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:18,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-23 08:04:18,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:18,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711433729] [2020-12-23 08:04:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:04:18,886 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 08:04:18,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711433729] [2020-12-23 08:04:18,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:04:18,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:04:18,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982672385] [2020-12-23 08:04:18,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:04:18,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:04:18,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:04:18,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:04:18,912 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-23 08:04:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:04:18,929 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2020-12-23 08:04:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:04:18,930 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 08:04:18,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:04:18,939 INFO L225 Difference]: With dead ends: 31 [2020-12-23 08:04:18,940 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 08:04:18,943 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 08:04:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 08:04:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 08:04:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 08:04:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-23 08:04:18,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2020-12-23 08:04:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:04:18,979 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-23 08:04:18,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:04:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-23 08:04:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 08:04:18,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:18,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:18,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:04:18,980 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:18,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-23 08:04:18,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:18,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929098283] [2020-12-23 08:04:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:18,999 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:04:19,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040947967] [2020-12-23 08:04:19,000 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 08:04:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:04:19,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 08:04:19,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:04:19,195 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 08:04:19,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929098283] [2020-12-23 08:04:19,195 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:04:19,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040947967] [2020-12-23 08:04:19,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:04:19,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 08:04:19,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698835290] [2020-12-23 08:04:19,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:04:19,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:04:19,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:04:19,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:04:19,200 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-12-23 08:04:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:04:19,312 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-23 08:04:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:04:19,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 08:04:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:04:19,314 INFO L225 Difference]: With dead ends: 23 [2020-12-23 08:04:19,314 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 08:04:19,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:04:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 08:04:19,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-23 08:04:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 08:04:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-23 08:04:19,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2020-12-23 08:04:19,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:04:19,321 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-23 08:04:19,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:04:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-23 08:04:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 08:04:19,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:19,322 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:19,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:04:19,537 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:19,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2020-12-23 08:04:19,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:19,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840592492] [2020-12-23 08:04:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:19,553 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:04:19,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696683682] [2020-12-23 08:04:19,554 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 08:04:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:04:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:04:19,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:04:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:04:19,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840592492] [2020-12-23 08:04:19,805 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:04:19,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696683682] [2020-12-23 08:04:19,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:04:19,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:04:19,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639264171] [2020-12-23 08:04:19,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:04:19,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:04:19,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:04:19,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:04:19,808 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2020-12-23 08:04:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:04:19,973 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-23 08:04:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 08:04:19,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 08:04:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:04:19,975 INFO L225 Difference]: With dead ends: 26 [2020-12-23 08:04:19,975 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 08:04:19,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:04:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 08:04:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-23 08:04:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 08:04:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-23 08:04:19,982 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2020-12-23 08:04:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:04:19,982 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-23 08:04:19,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:04:19,983 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-23 08:04:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 08:04:19,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:19,984 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:20,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:20,200 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2020-12-23 08:04:20,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:20,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798214840] [2020-12-23 08:04:20,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:20,217 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:04:20,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561425865] [2020-12-23 08:04:20,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:20,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:04:20,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:04:20,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 08:04:20,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:04:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:04:20,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798214840] [2020-12-23 08:04:20,516 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:04:20,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561425865] [2020-12-23 08:04:20,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:04:20,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:04:20,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065452690] [2020-12-23 08:04:20,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:04:20,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:04:20,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:04:20,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:04:20,523 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-12-23 08:04:20,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:04:20,668 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-23 08:04:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 08:04:20,669 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 08:04:20,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:04:20,670 INFO L225 Difference]: With dead ends: 29 [2020-12-23 08:04:20,670 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 08:04:20,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:04:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 08:04:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-23 08:04:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 08:04:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-23 08:04:20,677 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2020-12-23 08:04:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:04:20,677 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-23 08:04:20,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:04:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-23 08:04:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:04:20,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:20,679 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:20,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:20,894 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:20,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2020-12-23 08:04:20,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:20,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740066372] [2020-12-23 08:04:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:20,910 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:04:20,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232971503] [2020-12-23 08:04:20,910 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 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 08:04:20,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 08:04:20,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:04:20,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 08:04:20,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:04:21,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740066372] [2020-12-23 08:04:21,068 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:04:21,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232971503] [2020-12-23 08:04:21,069 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 08:04:21,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:04:21,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 08:04:21,069 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 08:04:21,070 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 08:04:21,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:21,312 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 08:04:21,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 08:04:21 BoogieIcfgContainer [2020-12-23 08:04:21,313 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 08:04:21,314 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 08:04:21,314 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 08:04:21,314 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 08:04:21,315 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:04:18" (3/4) ... [2020-12-23 08:04:21,318 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 08:04:21,319 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 08:04:21,321 INFO L168 Benchmark]: Toolchain (without parser) took 3612.10 ms. Allocated memory was 168.8 MB in the beginning and 233.8 MB in the end (delta: 65.0 MB). Free memory was 144.3 MB in the beginning and 152.3 MB in the end (delta: -8.0 MB). Peak memory consumption was 58.3 MB. Max. memory is 8.0 GB. [2020-12-23 08:04:21,322 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 168.8 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:04:21,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.21 ms. Allocated memory is still 168.8 MB. Free memory was 144.1 MB in the beginning and 133.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 08:04:21,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.16 ms. Allocated memory is still 168.8 MB. Free memory was 133.9 MB in the beginning and 132.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:04:21,324 INFO L168 Benchmark]: Boogie Preprocessor took 21.96 ms. Allocated memory is still 168.8 MB. Free memory was 132.5 MB in the beginning and 131.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:04:21,325 INFO L168 Benchmark]: RCFGBuilder took 565.54 ms. Allocated memory is still 168.8 MB. Free memory was 131.5 MB in the beginning and 151.4 MB in the end (delta: -19.9 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2020-12-23 08:04:21,326 INFO L168 Benchmark]: TraceAbstraction took 2735.68 ms. Allocated memory was 168.8 MB in the beginning and 233.8 MB in the end (delta: 65.0 MB). Free memory was 150.6 MB in the beginning and 152.3 MB in the end (delta: -1.7 MB). Peak memory consumption was 63.2 MB. Max. memory is 8.0 GB. [2020-12-23 08:04:21,327 INFO L168 Benchmark]: Witness Printer took 5.11 ms. Allocated memory is still 233.8 MB. Free memory is still 152.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:04:21,331 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 168.8 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.21 ms. Allocated memory is still 168.8 MB. Free memory was 144.1 MB in the beginning and 133.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.16 ms. Allocated memory is still 168.8 MB. Free memory was 133.9 MB in the beginning and 132.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.96 ms. Allocated memory is still 168.8 MB. Free memory was 132.5 MB in the beginning and 131.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 565.54 ms. Allocated memory is still 168.8 MB. Free memory was 131.5 MB in the beginning and 151.4 MB in the end (delta: -19.9 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2735.68 ms. Allocated memory was 168.8 MB in the beginning and 233.8 MB in the end (delta: 65.0 MB). Free memory was 150.6 MB in the beginning and 152.3 MB in the end (delta: -1.7 MB). Peak memory consumption was 63.2 MB. Max. memory is 8.0 GB. * Witness Printer took 5.11 ms. Allocated memory is still 233.8 MB. Free memory is still 152.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: 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: [L18] int k; [L19] long long y, x, c; [L20] k = __VERIFIER_nondet_int() [L7] COND FALSE !(!cond) [L23] y = 0 [L24] x = 0 [L25] c = 0 [L27] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y + x [L27] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y + x [L27] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y + x [L27] COND TRUE 1 [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2.6s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 49 SDslu, 64 SDs, 0 SdLazy, 87 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 1305 SizeOfPredicates, 20 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/9 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...