/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:58:43,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:58:43,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:58:43,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:58:43,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:58:43,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:58:43,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:58:43,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:58:43,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:58:43,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:58:43,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:58:43,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:58:43,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:58:43,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:58:43,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:58:43,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:58:43,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:58:43,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:58:43,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:58:43,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:58:43,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:58:43,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:58:43,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:58:43,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:58:43,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:58:43,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:58:43,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:58:43,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:58:43,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:58:43,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:58:43,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:58:43,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:58:43,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:58:43,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:58:43,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:58:43,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:58:43,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:58:43,272 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:58:43,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:58:43,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:58:43,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:58:43,275 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:58:43,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:58:43,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:58:43,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:58:43,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:58:43,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:58:43,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:58:43,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:58:43,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:58:43,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:58:43,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:58:43,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:58:43,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:58:43,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:58:43,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:58:43,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:58:43,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:58:43,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:58:43,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:58:43,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:58:43,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:58:43,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:58:43,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:58:43,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:58:43,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:58:43,788 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:58:43,789 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:58:43,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound20.c [2021-01-06 17:58:43,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9576c1b1c/5c51053d5de84141a0f629f3011574d5/FLAGb95a718b2 [2021-01-06 17:58:44,493 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:58:44,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound20.c [2021-01-06 17:58:44,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9576c1b1c/5c51053d5de84141a0f629f3011574d5/FLAGb95a718b2 [2021-01-06 17:58:44,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9576c1b1c/5c51053d5de84141a0f629f3011574d5 [2021-01-06 17:58:44,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:58:44,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:58:44,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:58:44,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:58:44,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:58:44,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:58:44" (1/1) ... [2021-01-06 17:58:44,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2751999e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:44, skipping insertion in model container [2021-01-06 17:58:44,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:58:44" (1/1) ... [2021-01-06 17:58:44,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:58:44,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:58:45,093 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_valuebound20.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,] [2021-01-06 17:58:45,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:58:45,117 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:58:45,131 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_valuebound20.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,] [2021-01-06 17:58:45,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:58:45,152 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:58:45,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45 WrapperNode [2021-01-06 17:58:45,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:58:45,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:58:45,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:58:45,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:58:45,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45" (1/1) ... [2021-01-06 17:58:45,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45" (1/1) ... [2021-01-06 17:58:45,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:58:45,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:58:45,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:58:45,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:58:45,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45" (1/1) ... [2021-01-06 17:58:45,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45" (1/1) ... [2021-01-06 17:58:45,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45" (1/1) ... [2021-01-06 17:58:45,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45" (1/1) ... [2021-01-06 17:58:45,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45" (1/1) ... [2021-01-06 17:58:45,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45" (1/1) ... [2021-01-06 17:58:45,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45" (1/1) ... [2021-01-06 17:58:45,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:58:45,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:58:45,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:58:45,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:58:45,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:58:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:58:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:58:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:58:45,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:58:45,565 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:58:45,566 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 17:58:45,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:58:45 BoogieIcfgContainer [2021-01-06 17:58:45,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:58:45,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:58:45,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:58:45,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:58:45,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:58:44" (1/3) ... [2021-01-06 17:58:45,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f96b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:58:45, skipping insertion in model container [2021-01-06 17:58:45,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:45" (2/3) ... [2021-01-06 17:58:45,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f96b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:58:45, skipping insertion in model container [2021-01-06 17:58:45,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:58:45" (3/3) ... [2021-01-06 17:58:45,599 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound20.c [2021-01-06 17:58:45,619 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:58:45,630 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:58:45,675 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:58:45,727 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:58:45,727 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:58:45,728 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:58:45,728 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:58:45,730 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:58:45,731 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:58:45,731 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:58:45,731 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:58:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 17:58:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:58:45,760 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:58:45,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:58:45,776 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:58:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:58:45,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-01-06 17:58:45,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:58:45,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741404022] [2021-01-06 17:58:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:58:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:58:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:58:46,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741404022] [2021-01-06 17:58:46,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:58:46,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:58:46,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121505297] [2021-01-06 17:58:46,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:58:46,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:58:46,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:58:46,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:58:46,103 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 17:58:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:58:46,123 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-01-06 17:58:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:58:46,125 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:58:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:58:46,138 INFO L225 Difference]: With dead ends: 31 [2021-01-06 17:58:46,138 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 17:58:46,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:58:46,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 17:58:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 17:58:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 17:58:46,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-01-06 17:58:46,182 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2021-01-06 17:58:46,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:58:46,183 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-01-06 17:58:46,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:58:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-01-06 17:58:46,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:58:46,185 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:58:46,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:58:46,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:58:46,187 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:58:46,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:58:46,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-01-06 17:58:46,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:58:46,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539380003] [2021-01-06 17:58:46,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:58:46,240 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:58:46,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492283108] [2021-01-06 17:58:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:58:46,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:58:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:58:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:58:46,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539380003] [2021-01-06 17:58:46,465 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:46,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492283108] [2021-01-06 17:58:46,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:58:46,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:58:46,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936396568] [2021-01-06 17:58:46,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:58:46,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:58:46,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:58:46,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:58:46,469 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2021-01-06 17:58:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:58:46,548 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-01-06 17:58:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:58:46,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 17:58:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:58:46,550 INFO L225 Difference]: With dead ends: 23 [2021-01-06 17:58:46,550 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:58:46,551 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 [2021-01-06 17:58:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:58:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-01-06 17:58:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:58:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-01-06 17:58:46,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2021-01-06 17:58:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:58:46,557 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-01-06 17:58:46,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:58:46,558 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-01-06 17:58:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:58:46,558 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:58:46,559 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:58:46,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:58:46,774 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:58:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:58:46,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2021-01-06 17:58:46,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:58:46,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713798940] [2021-01-06 17:58:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:58:46,800 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:58:46,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610300232] [2021-01-06 17:58:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:58:46,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:58:46,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:58:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:58:46,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713798940] [2021-01-06 17:58:46,934 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:46,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610300232] [2021-01-06 17:58:46,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:58:46,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:58:46,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514849053] [2021-01-06 17:58:46,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:58:46,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:58:46,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:58:46,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:58:46,941 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2021-01-06 17:58:47,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:58:47,075 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-01-06 17:58:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:58:47,076 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 17:58:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:58:47,077 INFO L225 Difference]: With dead ends: 26 [2021-01-06 17:58:47,077 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:58:47,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:58:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:58:47,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-01-06 17:58:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:58:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 17:58:47,084 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2021-01-06 17:58:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:58:47,085 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 17:58:47,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:58:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 17:58:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:58:47,086 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:58:47,086 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:58:47,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:47,301 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:58:47,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:58:47,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2021-01-06 17:58:47,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:58:47,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628018059] [2021-01-06 17:58:47,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:58:47,317 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:58:47,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471460465] [2021-01-06 17:58:47,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:47,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:58:47,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:58:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:58:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:58:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:58:47,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628018059] [2021-01-06 17:58:47,469 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:47,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471460465] [2021-01-06 17:58:47,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:58:47,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:58:47,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842633506] [2021-01-06 17:58:47,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:58:47,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:58:47,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:58:47,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:58:47,472 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2021-01-06 17:58:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:58:47,549 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-01-06 17:58:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:58:47,549 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2021-01-06 17:58:47,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:58:47,550 INFO L225 Difference]: With dead ends: 29 [2021-01-06 17:58:47,551 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:58:47,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:58:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:58:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-01-06 17:58:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:58:47,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-01-06 17:58:47,558 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2021-01-06 17:58:47,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:58:47,558 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-01-06 17:58:47,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:58:47,559 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-01-06 17:58:47,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:58:47,560 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:58:47,560 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:58:47,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:47,776 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:58:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:58:47,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2021-01-06 17:58:47,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:58:47,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28980979] [2021-01-06 17:58:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:58:47,792 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:58:47,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023589742] [2021-01-06 17:58:47,793 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 [2021-01-06 17:58:47,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:58:47,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:58:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:58:47,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:58:47,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28980979] [2021-01-06 17:58:47,920 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:47,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023589742] [2021-01-06 17:58:47,920 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:58:47,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:58:47,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:58:47,921 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:58:47,921 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:58:48,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:48,158 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:58:48,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:58:48 BoogieIcfgContainer [2021-01-06 17:58:48,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:58:48,159 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:58:48,159 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:58:48,159 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:58:48,160 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:58:45" (3/4) ... [2021-01-06 17:58:48,163 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:58:48,164 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:58:48,166 INFO L168 Benchmark]: Toolchain (without parser) took 3296.46 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 147.4 MB in the beginning and 175.9 MB in the end (delta: -28.5 MB). Peak memory consumption was 6.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:48,167 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 172.0 MB. Free memory is still 143.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:58:48,168 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.30 ms. Allocated memory is still 172.0 MB. Free memory was 147.3 MB in the beginning and 137.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:48,169 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.86 ms. Allocated memory is still 172.0 MB. Free memory was 137.6 MB in the beginning and 135.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:48,171 INFO L168 Benchmark]: Boogie Preprocessor took 24.05 ms. Allocated memory is still 172.0 MB. Free memory was 135.5 MB in the beginning and 134.6 MB in the end (delta: 931.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:48,172 INFO L168 Benchmark]: RCFGBuilder took 355.09 ms. Allocated memory is still 172.0 MB. Free memory was 134.5 MB in the beginning and 122.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:48,172 INFO L168 Benchmark]: TraceAbstraction took 2579.62 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 121.8 MB in the beginning and 176.4 MB in the end (delta: -54.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:58:48,179 INFO L168 Benchmark]: Witness Printer took 4.87 ms. Allocated memory is still 206.6 MB. Free memory was 176.4 MB in the beginning and 175.9 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:58:48,187 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 172.0 MB. Free memory is still 143.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.30 ms. Allocated memory is still 172.0 MB. Free memory was 147.3 MB in the beginning and 137.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.86 ms. Allocated memory is still 172.0 MB. Free memory was 137.6 MB in the beginning and 135.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.05 ms. Allocated memory is still 172.0 MB. Free memory was 135.5 MB in the beginning and 134.6 MB in the end (delta: 931.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 355.09 ms. Allocated memory is still 172.0 MB. Free memory was 134.5 MB in the beginning and 122.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2579.62 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 121.8 MB in the beginning and 176.4 MB in the end (delta: -54.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 4.87 ms. Allocated memory is still 206.6 MB. Free memory was 176.4 MB in the beginning and 175.9 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: 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: 2.4s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.3s, 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, 0.2s 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, 0.3s 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...