/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/reducercommutativity/rangesum05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:56:47,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:56:47,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:56:47,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:56:47,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:56:47,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:56:47,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:56:47,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:56:47,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:56:47,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:56:47,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:56:47,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:56:47,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:56:47,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:56:47,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:56:47,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:56:47,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:56:47,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:56:47,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:56:47,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:56:47,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:56:47,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:56:47,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:56:47,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:56:47,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:56:47,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:56:47,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:56:47,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:56:47,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:56:47,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:56:47,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:56:47,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:56:47,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:56:47,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:56:47,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:56:47,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:56:47,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:56:47,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:56:47,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:56:47,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:56:47,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:56:47,277 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:56:47,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:56:47,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:56:47,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:56:47,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:56:47,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:56:47,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:56:47,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:56:47,281 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:56:47,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:56:47,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:56:47,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:56:47,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:56:47,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:56:47,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:56:47,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:56:47,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:56:47,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:56:47,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:56:47,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:56:47,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:56:47,284 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:56:47,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:56:47,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:56:47,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:56:47,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:56:47,781 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:56:47,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum05.i [2020-12-21 21:56:47,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c11a49ce6/a04b749f240345cebf0defd8b908a828/FLAGed7b29bb6 [2020-12-21 21:56:48,469 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:56:48,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i [2020-12-21 21:56:48,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c11a49ce6/a04b749f240345cebf0defd8b908a828/FLAGed7b29bb6 [2020-12-21 21:56:48,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c11a49ce6/a04b749f240345cebf0defd8b908a828 [2020-12-21 21:56:48,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:56:48,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:56:48,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:56:48,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:56:48,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:56:48,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:56:48" (1/1) ... [2020-12-21 21:56:48,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f811768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:48, skipping insertion in model container [2020-12-21 21:56:48,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:56:48" (1/1) ... [2020-12-21 21:56:48,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:56:48,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:56:49,066 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2020-12-21 21:56:49,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:56:49,079 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:56:49,104 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2020-12-21 21:56:49,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:56:49,123 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:56:49,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49 WrapperNode [2020-12-21 21:56:49,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:56:49,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:56:49,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:56:49,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:56:49,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49" (1/1) ... [2020-12-21 21:56:49,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49" (1/1) ... [2020-12-21 21:56:49,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:56:49,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:56:49,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:56:49,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:56:49,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49" (1/1) ... [2020-12-21 21:56:49,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49" (1/1) ... [2020-12-21 21:56:49,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49" (1/1) ... [2020-12-21 21:56:49,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49" (1/1) ... [2020-12-21 21:56:49,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49" (1/1) ... [2020-12-21 21:56:49,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49" (1/1) ... [2020-12-21 21:56:49,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49" (1/1) ... [2020-12-21 21:56:49,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:56:49,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:56:49,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:56:49,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:56:49,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:56:49,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:56:49,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:56:49,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:56:49,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:56:49,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:56:49,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:56:49,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:56:49,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:56:49,758 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-21 21:56:49,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:56:49 BoogieIcfgContainer [2020-12-21 21:56:49,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:56:49,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:56:49,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:56:49,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:56:49,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:56:48" (1/3) ... [2020-12-21 21:56:49,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39cb9ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:56:49, skipping insertion in model container [2020-12-21 21:56:49,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:49" (2/3) ... [2020-12-21 21:56:49,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39cb9ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:56:49, skipping insertion in model container [2020-12-21 21:56:49,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:56:49" (3/3) ... [2020-12-21 21:56:49,772 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-12-21 21:56:49,781 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:56:49,786 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:56:49,811 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:56:49,864 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:56:49,864 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:56:49,864 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:56:49,865 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:56:49,865 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:56:49,865 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:56:49,865 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:56:49,865 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:56:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-21 21:56:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:56:49,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:49,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:49,911 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:49,918 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2020-12-21 21:56:49,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:49,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397574160] [2020-12-21 21:56:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:56:50,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397574160] [2020-12-21 21:56:50,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:50,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:56:50,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240144031] [2020-12-21 21:56:50,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:56:50,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:50,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:56:50,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:56:50,152 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-21 21:56:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:50,177 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2020-12-21 21:56:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:56:50,179 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-21 21:56:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:50,189 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:56:50,190 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:56:50,193 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 [2020-12-21 21:56:50,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:56:50,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-21 21:56:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:56:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-21 21:56:50,237 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2020-12-21 21:56:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:50,238 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-21 21:56:50,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:56:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-21 21:56:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:56:50,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:50,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:50,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:56:50,241 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2020-12-21 21:56:50,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:50,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047366962] [2020-12-21 21:56:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:50,263 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:50,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702685696] [2020-12-21 21:56:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:56:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:50,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:56:50,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:56:50,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047366962] [2020-12-21 21:56:50,403 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:50,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702685696] [2020-12-21 21:56:50,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:50,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:56:50,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527535467] [2020-12-21 21:56:50,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:56:50,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:50,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:56:50,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:56:50,408 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2020-12-21 21:56:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:50,426 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-12-21 21:56:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:56:50,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-21 21:56:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:50,427 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:56:50,428 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 21:56:50,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:56:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 21:56:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-21 21:56:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 21:56:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-12-21 21:56:50,435 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2020-12-21 21:56:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:50,436 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-12-21 21:56:50,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:56:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-12-21 21:56:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:56:50,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:50,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:50,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:56:50,652 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:50,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:50,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2020-12-21 21:56:50,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:50,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576199256] [2020-12-21 21:56:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:56:50,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576199256] [2020-12-21 21:56:50,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654830163] [2020-12-21 21:56:50,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:56:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:50,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:56:50,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:56:50,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:50,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:56:50,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078962256] [2020-12-21 21:56:50,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:56:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:56:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:50,821 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-12-21 21:56:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:50,882 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2020-12-21 21:56:50,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:56:50,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-21 21:56:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:50,884 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:56:50,884 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:56:50,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:56:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-21 21:56:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:56:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-12-21 21:56:50,892 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2020-12-21 21:56:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:50,893 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-12-21 21:56:50,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:56:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-12-21 21:56:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:56:50,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:50,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:51,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:51,110 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:51,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:51,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2020-12-21 21:56:51,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:51,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277800453] [2020-12-21 21:56:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:56:51,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277800453] [2020-12-21 21:56:51,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286045860] [2020-12-21 21:56:51,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:56:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:51,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:56:51,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:56:51,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:51,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:56:51,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185414100] [2020-12-21 21:56:51,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:56:51,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:51,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:56:51,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:51,318 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2020-12-21 21:56:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:51,332 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-12-21 21:56:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:56:51,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-21 21:56:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:51,334 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:56:51,334 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:56:51,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:56:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-21 21:56:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:56:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-12-21 21:56:51,340 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2020-12-21 21:56:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:51,340 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-12-21 21:56:51,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:56:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-12-21 21:56:51,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:56:51,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:51,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:51,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:51,557 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:51,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:51,559 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2020-12-21 21:56:51,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:51,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221303319] [2020-12-21 21:56:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:56:51,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221303319] [2020-12-21 21:56:51,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182054120] [2020-12-21 21:56:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:56:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:51,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:56:51,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:56:51,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:51,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:56:51,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487887592] [2020-12-21 21:56:51,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:56:51,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:56:51,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:51,743 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-12-21 21:56:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:51,793 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2020-12-21 21:56:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:56:51,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-21 21:56:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:51,795 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:56:51,795 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:56:51,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:56:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-12-21 21:56:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:56:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-12-21 21:56:51,804 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2020-12-21 21:56:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:51,804 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-12-21 21:56:51,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:56:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-12-21 21:56:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:56:51,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:51,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:52,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:52,022 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:52,024 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2020-12-21 21:56:52,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:52,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23841595] [2020-12-21 21:56:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:56:52,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23841595] [2020-12-21 21:56:52,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281069805] [2020-12-21 21:56:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:52,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:56:52,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:56:52,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:56:52,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:56:52,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124566862] [2020-12-21 21:56:52,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:56:52,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:52,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:56:52,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:52,203 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2020-12-21 21:56:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:52,223 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2020-12-21 21:56:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:56:52,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-21 21:56:52,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:52,224 INFO L225 Difference]: With dead ends: 90 [2020-12-21 21:56:52,224 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 21:56:52,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 21:56:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-21 21:56:52,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:56:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-12-21 21:56:52,231 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2020-12-21 21:56:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:52,232 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-12-21 21:56:52,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:56:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-12-21 21:56:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:56:52,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:52,233 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:52,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:56:52,447 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:52,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2020-12-21 21:56:52,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:52,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104211936] [2020-12-21 21:56:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:56:52,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104211936] [2020-12-21 21:56:52,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759768990] [2020-12-21 21:56:52,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:52,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 21:56:52,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:52,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:56:52,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:56:52,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:52,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-12-21 21:56:52,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311223068] [2020-12-21 21:56:52,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:56:52,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:52,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:56:52,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:56:52,714 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-12-21 21:56:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:52,807 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2020-12-21 21:56:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:56:52,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-21 21:56:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:52,813 INFO L225 Difference]: With dead ends: 114 [2020-12-21 21:56:52,813 INFO L226 Difference]: Without dead ends: 109 [2020-12-21 21:56:52,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:56:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-21 21:56:52,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-12-21 21:56:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 21:56:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-12-21 21:56:52,842 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2020-12-21 21:56:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:52,843 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-12-21 21:56:52,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:56:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-12-21 21:56:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:56:52,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:52,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:53,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:53,062 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2020-12-21 21:56:53,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:53,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590790347] [2020-12-21 21:56:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:56:53,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590790347] [2020-12-21 21:56:53,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993853624] [2020-12-21 21:56:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:56:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:56:53,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:56:53,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:56:53,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447132734] [2020-12-21 21:56:53,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:56:53,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:53,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:56:53,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:56:53,224 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2020-12-21 21:56:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:53,302 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2020-12-21 21:56:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:56:53,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 21:56:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:53,305 INFO L225 Difference]: With dead ends: 162 [2020-12-21 21:56:53,305 INFO L226 Difference]: Without dead ends: 96 [2020-12-21 21:56:53,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:56:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-21 21:56:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-21 21:56:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:56:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-12-21 21:56:53,315 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2020-12-21 21:56:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:53,315 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-12-21 21:56:53,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:56:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-12-21 21:56:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:56:53,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:53,317 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:53,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:53,532 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:53,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2020-12-21 21:56:53,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:53,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452113418] [2020-12-21 21:56:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:53,558 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:53,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88201211] [2020-12-21 21:56:53,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:53,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:56:53,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:53,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:56:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-21 21:56:53,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452113418] [2020-12-21 21:56:53,742 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:53,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88201211] [2020-12-21 21:56:53,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:53,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:56:53,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139427301] [2020-12-21 21:56:53,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:56:53,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:53,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:56:53,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:56:53,744 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2020-12-21 21:56:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:53,770 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2020-12-21 21:56:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:56:53,770 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-21 21:56:53,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:53,771 INFO L225 Difference]: With dead ends: 174 [2020-12-21 21:56:53,771 INFO L226 Difference]: Without dead ends: 93 [2020-12-21 21:56:53,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:56:53,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-21 21:56:53,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-21 21:56:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-21 21:56:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2020-12-21 21:56:53,780 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2020-12-21 21:56:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:53,780 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2020-12-21 21:56:53,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:56:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2020-12-21 21:56:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:56:53,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:53,782 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:53,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:56:53,998 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:53,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:53,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2020-12-21 21:56:54,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:54,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932352612] [2020-12-21 21:56:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:56:54,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932352612] [2020-12-21 21:56:54,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:54,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:56:54,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082316024] [2020-12-21 21:56:54,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:56:54,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:54,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:56:54,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:56:54,052 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2020-12-21 21:56:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:54,136 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2020-12-21 21:56:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:56:54,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-21 21:56:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:54,138 INFO L225 Difference]: With dead ends: 177 [2020-12-21 21:56:54,138 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 21:56:54,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:56:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 21:56:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2020-12-21 21:56:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:56:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-12-21 21:56:54,146 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2020-12-21 21:56:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:54,147 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-12-21 21:56:54,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:56:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-12-21 21:56:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 21:56:54,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:54,148 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:54,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-21 21:56:54,149 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:54,149 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2020-12-21 21:56:54,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:54,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146951972] [2020-12-21 21:56:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:54,164 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:54,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635348082] [2020-12-21 21:56:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:54,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:56:54,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:56:54,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146951972] [2020-12-21 21:56:54,336 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:54,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635348082] [2020-12-21 21:56:54,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:54,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:56:54,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261152072] [2020-12-21 21:56:54,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:56:54,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:54,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:56:54,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:56:54,338 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2020-12-21 21:56:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:54,366 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2020-12-21 21:56:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:56:54,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-21 21:56:54,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:54,368 INFO L225 Difference]: With dead ends: 157 [2020-12-21 21:56:54,368 INFO L226 Difference]: Without dead ends: 85 [2020-12-21 21:56:54,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:56:54,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-21 21:56:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-21 21:56:54,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:56:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-12-21 21:56:54,376 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2020-12-21 21:56:54,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:54,377 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-12-21 21:56:54,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:56:54,377 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-12-21 21:56:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:56:54,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:54,378 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:54,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:54,593 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:54,594 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2020-12-21 21:56:54,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:54,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92631202] [2020-12-21 21:56:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:54,618 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:54,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115842546] [2020-12-21 21:56:54,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:54,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:56:54,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:54,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:56:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 21:56:54,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92631202] [2020-12-21 21:56:54,788 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:54,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115842546] [2020-12-21 21:56:54,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:54,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:56:54,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466994160] [2020-12-21 21:56:54,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:56:54,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:54,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:56:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:54,790 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 5 states. [2020-12-21 21:56:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:54,870 INFO L93 Difference]: Finished difference Result 166 states and 202 transitions. [2020-12-21 21:56:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:56:54,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-12-21 21:56:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:54,871 INFO L225 Difference]: With dead ends: 166 [2020-12-21 21:56:54,872 INFO L226 Difference]: Without dead ends: 100 [2020-12-21 21:56:54,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-21 21:56:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-21 21:56:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-21 21:56:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2020-12-21 21:56:54,880 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 56 [2020-12-21 21:56:54,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:54,881 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2020-12-21 21:56:54,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:56:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2020-12-21 21:56:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:56:54,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:54,882 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:55,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:55,096 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:55,098 INFO L82 PathProgramCache]: Analyzing trace with hash 35998627, now seen corresponding path program 3 times [2020-12-21 21:56:55,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:55,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115294840] [2020-12-21 21:56:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:55,131 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:55,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770810786] [2020-12-21 21:56:55,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:55,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:56:55,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:55,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:56:55,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-12-21 21:56:55,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115294840] [2020-12-21 21:56:55,317 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:55,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770810786] [2020-12-21 21:56:55,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:55,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:56:55,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373847456] [2020-12-21 21:56:55,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:56:55,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:55,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:56:55,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:56:55,320 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 4 states. [2020-12-21 21:56:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:55,357 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-12-21 21:56:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:56:55,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-21 21:56:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:55,359 INFO L225 Difference]: With dead ends: 132 [2020-12-21 21:56:55,359 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:56:55,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:56:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:56:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2020-12-21 21:56:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 21:56:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-12-21 21:56:55,366 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 65 [2020-12-21 21:56:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:55,366 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-12-21 21:56:55,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:56:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-12-21 21:56:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:56:55,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:55,367 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:55,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:56:55,582 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:55,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1841436961, now seen corresponding path program 1 times [2020-12-21 21:56:55,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:55,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086508639] [2020-12-21 21:56:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:55,611 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:55,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128607807] [2020-12-21 21:56:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:55,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:56:55,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:56:55,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086508639] [2020-12-21 21:56:55,796 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:55,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128607807] [2020-12-21 21:56:55,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:55,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:56:55,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795786243] [2020-12-21 21:56:55,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:56:55,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:55,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:56:55,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:56:55,799 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 7 states. [2020-12-21 21:56:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:55,924 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2020-12-21 21:56:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:56:55,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-12-21 21:56:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:55,926 INFO L225 Difference]: With dead ends: 114 [2020-12-21 21:56:55,926 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:56:55,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:56:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:56:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-21 21:56:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-21 21:56:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-12-21 21:56:55,936 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 65 [2020-12-21 21:56:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:55,939 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-12-21 21:56:55,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:56:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-12-21 21:56:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-21 21:56:55,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:55,940 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:56,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:56:56,157 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:56,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:56,158 INFO L82 PathProgramCache]: Analyzing trace with hash -484525568, now seen corresponding path program 2 times [2020-12-21 21:56:56,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:56,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396816344] [2020-12-21 21:56:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:56,172 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:56,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699418434] [2020-12-21 21:56:56,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:56,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:56:56,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:56,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:56:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-21 21:56:56,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396816344] [2020-12-21 21:56:56,352 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:56,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699418434] [2020-12-21 21:56:56,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:56,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 21:56:56,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888774846] [2020-12-21 21:56:56,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:56:56,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:56,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:56:56,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:56:56,355 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 4 states. [2020-12-21 21:56:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:56,373 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2020-12-21 21:56:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:56:56,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-21 21:56:56,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:56,374 INFO L225 Difference]: With dead ends: 100 [2020-12-21 21:56:56,374 INFO L226 Difference]: Without dead ends: 78 [2020-12-21 21:56:56,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:56:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-21 21:56:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-21 21:56:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-21 21:56:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-12-21 21:56:56,380 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 74 [2020-12-21 21:56:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:56,380 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-12-21 21:56:56,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:56:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-12-21 21:56:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 21:56:56,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:56,381 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:56,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:56:56,595 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:56,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1416102914, now seen corresponding path program 3 times [2020-12-21 21:56:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:56,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470201387] [2020-12-21 21:56:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:56,610 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:56,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244967410] [2020-12-21 21:56:56,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:56,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:56:56,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:56,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:56:56,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-21 21:56:57,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470201387] [2020-12-21 21:56:57,095 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:57,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244967410] [2020-12-21 21:56:57,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:57,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:56:57,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448948813] [2020-12-21 21:56:57,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:56:57,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:57,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:56:57,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:57,111 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-12-21 21:56:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:57,134 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-12-21 21:56:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:56:57,135 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-12-21 21:56:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:57,136 INFO L225 Difference]: With dead ends: 102 [2020-12-21 21:56:57,136 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:56:57,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:56:57,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-21 21:56:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 21:56:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-12-21 21:56:57,143 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 76 [2020-12-21 21:56:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:57,143 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-12-21 21:56:57,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:56:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-12-21 21:56:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-21 21:56:57,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:57,144 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:57,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:57,357 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1735993980, now seen corresponding path program 4 times [2020-12-21 21:56:57,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:57,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321376044] [2020-12-21 21:56:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:57,375 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:57,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388120626] [2020-12-21 21:56:57,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:57,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:56:57,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:57,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:56:57,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-21 21:56:57,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321376044] [2020-12-21 21:56:57,586 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:57,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388120626] [2020-12-21 21:56:57,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:57,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:56:57,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436618762] [2020-12-21 21:56:57,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:56:57,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:57,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:56:57,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:56:57,589 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 6 states. [2020-12-21 21:56:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:57,617 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-12-21 21:56:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:56:57,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-21 21:56:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:57,619 INFO L225 Difference]: With dead ends: 103 [2020-12-21 21:56:57,619 INFO L226 Difference]: Without dead ends: 81 [2020-12-21 21:56:57,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:56:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-21 21:56:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-21 21:56:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 21:56:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2020-12-21 21:56:57,625 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2020-12-21 21:56:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:57,625 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2020-12-21 21:56:57,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:56:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2020-12-21 21:56:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-21 21:56:57,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:57,627 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:57,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:56:57,840 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:57,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 5 times [2020-12-21 21:56:57,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:57,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080719095] [2020-12-21 21:56:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:57,856 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:57,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113620420] [2020-12-21 21:56:57,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:58,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:56:58,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-21 21:56:58,282 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 21:56:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 21:56:58,534 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 21:56:58,775 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-21 21:56:58,776 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-21 21:56:58,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:56:59,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 09:56:59 BoogieIcfgContainer [2020-12-21 21:56:59,080 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-21 21:56:59,081 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-21 21:56:59,081 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-21 21:56:59,081 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-21 21:56:59,082 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:56:49" (3/4) ... [2020-12-21 21:56:59,085 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-21 21:56:59,176 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/reducercommutativity/rangesum05.i-witness.graphml [2020-12-21 21:56:59,176 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-21 21:56:59,178 INFO L168 Benchmark]: Toolchain (without parser) took 10327.78 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.5 MB in the beginning and 129.0 MB in the end (delta: -2.5 MB). Peak memory consumption was 29.1 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:59,178 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.7 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 21:56:59,179 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.40 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:59,179 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.17 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:59,180 INFO L168 Benchmark]: Boogie Preprocessor took 35.83 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 112.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:59,180 INFO L168 Benchmark]: RCFGBuilder took 544.37 ms. Allocated memory is still 151.0 MB. Free memory was 112.8 MB in the beginning and 125.4 MB in the end (delta: -12.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:59,181 INFO L168 Benchmark]: TraceAbstraction took 9317.73 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 124.9 MB in the beginning and 135.8 MB in the end (delta: -10.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:59,181 INFO L168 Benchmark]: Witness Printer took 94.73 ms. Allocated memory is still 181.4 MB. Free memory was 135.8 MB in the beginning and 129.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:59,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.7 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.40 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.17 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.83 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 112.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 544.37 ms. Allocated memory is still 151.0 MB. Free memory was 112.8 MB in the beginning and 125.4 MB in the end (delta: -12.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9317.73 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 124.9 MB in the beginning and 135.8 MB in the end (delta: -10.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 8.0 GB. * Witness Printer took 94.73 ms. Allocated memory is still 181.4 MB. Free memory was 135.8 MB in the beginning and 129.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[5]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 5) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<5 -1) [L57] x[5 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.1s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 526 SDtfs, 266 SDslu, 677 SDs, 0 SdLazy, 362 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 721 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 95 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 1024 NumberOfCodeBlocks, 941 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 921 ConstructedInterpolants, 0 QuantifiedInterpolants, 58587 SizeOfPredicates, 5 NumberOfNonLiveVariables, 2576 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 PerfectInterpolantSequences, 765/844 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 proved your program to be incorrect! Received shutdown request...