/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:59:34,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:59:34,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:59:34,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:59:34,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:59:34,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:59:34,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:59:34,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:59:34,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:59:34,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:59:34,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:59:34,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:59:34,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:59:34,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:59:34,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:59:34,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:59:34,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:59:34,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:59:34,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:59:34,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:59:34,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:59:34,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:59:34,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:59:34,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:59:34,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:59:34,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:59:34,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:59:34,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:59:34,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:59:34,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:59:34,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:59:34,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:59:34,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:59:34,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:59:34,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:59:34,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:59:34,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:59:34,289 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:59:34,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:59:34,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:59:34,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:59:34,294 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:59:34,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:59:34,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:59:34,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:59:34,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:59:34,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:59:34,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:59:34,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:59:34,297 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:59:34,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:59:34,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:59:34,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:59:34,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:59:34,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:59:34,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:59:34,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:59:34,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:59:34,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:59:34,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:59:34,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:59:34,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:59:34,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:59:34,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:59:34,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:59:34,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:59:34,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:59:34,738 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:59:34,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound2.c [2021-01-06 17:59:34,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8ff2cc27b/ccebd33a478b47f094768c1176a87f3c/FLAGc4c6b96f6 [2021-01-06 17:59:35,419 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:59:35,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound2.c [2021-01-06 17:59:35,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8ff2cc27b/ccebd33a478b47f094768c1176a87f3c/FLAGc4c6b96f6 [2021-01-06 17:59:35,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8ff2cc27b/ccebd33a478b47f094768c1176a87f3c [2021-01-06 17:59:35,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:59:35,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:59:35,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:59:35,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:59:35,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:59:35,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:59:35" (1/1) ... [2021-01-06 17:59:35,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519e448c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:35, skipping insertion in model container [2021-01-06 17:59:35,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:59:35" (1/1) ... [2021-01-06 17:59:35,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:59:35,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:59:36,087 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound2.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 17:59:36,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:59:36,126 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:59:36,143 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound2.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 17:59:36,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:59:36,190 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:59:36,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36 WrapperNode [2021-01-06 17:59:36,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:59:36,195 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:59:36,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:59:36,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:59:36,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36" (1/1) ... [2021-01-06 17:59:36,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36" (1/1) ... [2021-01-06 17:59:36,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:59:36,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:59:36,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:59:36,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:59:36,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36" (1/1) ... [2021-01-06 17:59:36,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36" (1/1) ... [2021-01-06 17:59:36,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36" (1/1) ... [2021-01-06 17:59:36,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36" (1/1) ... [2021-01-06 17:59:36,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36" (1/1) ... [2021-01-06 17:59:36,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36" (1/1) ... [2021-01-06 17:59:36,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36" (1/1) ... [2021-01-06 17:59:36,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:59:36,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:59:36,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:59:36,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:59:36,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:59:36,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:59:36,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:59:36,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:59:36,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:59:36,793 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:59:36,796 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:59:36,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:59:36 BoogieIcfgContainer [2021-01-06 17:59:36,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:59:36,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:59:36,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:59:36,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:59:36,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:59:35" (1/3) ... [2021-01-06 17:59:36,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165a2fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:59:36, skipping insertion in model container [2021-01-06 17:59:36,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:36" (2/3) ... [2021-01-06 17:59:36,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165a2fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:59:36, skipping insertion in model container [2021-01-06 17:59:36,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:59:36" (3/3) ... [2021-01-06 17:59:36,822 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound2.c [2021-01-06 17:59:36,831 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:59:36,836 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 17:59:36,856 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 17:59:36,887 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:59:36,887 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:59:36,887 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:59:36,887 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:59:36,887 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:59:36,887 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:59:36,888 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:59:36,888 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:59:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 17:59:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:59:36,907 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:36,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:36,908 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:36,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-01-06 17:59:36,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:36,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638207814] [2021-01-06 17:59:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:37,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638207814] [2021-01-06 17:59:37,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:59:37,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:59:37,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012849288] [2021-01-06 17:59:37,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:59:37,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:37,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:59:37,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:59:37,127 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 17:59:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:37,144 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-01-06 17:59:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:59:37,146 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:59:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:37,154 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:59:37,154 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:59:37,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:59:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:59:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 17:59:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:59:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-01-06 17:59:37,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2021-01-06 17:59:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:37,192 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-01-06 17:59:37,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:59:37,192 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-01-06 17:59:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:59:37,193 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:37,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:37,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:59:37,193 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-01-06 17:59:37,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:37,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550227707] [2021-01-06 17:59:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:37,213 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:37,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820061962] [2021-01-06 17:59:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:37,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:59:37,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:37,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550227707] [2021-01-06 17:59:37,417 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:37,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820061962] [2021-01-06 17:59:37,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:59:37,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:59:37,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401557828] [2021-01-06 17:59:37,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:59:37,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:37,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:59:37,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:59:37,421 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2021-01-06 17:59:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:37,571 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-01-06 17:59:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:59:37,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 17:59:37,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:37,573 INFO L225 Difference]: With dead ends: 31 [2021-01-06 17:59:37,573 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 17:59:37,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:59:37,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 17:59:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-01-06 17:59:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:59:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-01-06 17:59:37,581 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2021-01-06 17:59:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:37,581 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-01-06 17:59:37,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:59:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-01-06 17:59:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:59:37,582 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:37,583 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:37,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:59:37,798 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:37,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2021-01-06 17:59:37,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:37,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517995818] [2021-01-06 17:59:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:37,814 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:37,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792484448] [2021-01-06 17:59:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:37,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:59:37,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:37,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517995818] [2021-01-06 17:59:37,977 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:37,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792484448] [2021-01-06 17:59:37,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:59:37,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:59:37,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669436583] [2021-01-06 17:59:37,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:59:37,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:37,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:59:37,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:59:37,980 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2021-01-06 17:59:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:38,216 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-01-06 17:59:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:59:38,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 17:59:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:38,221 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:59:38,222 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:59:38,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:59:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:59:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-01-06 17:59:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:59:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-01-06 17:59:38,237 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2021-01-06 17:59:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:38,238 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-01-06 17:59:38,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:59:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-01-06 17:59:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:59:38,239 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:38,239 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:38,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:38,455 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:38,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2021-01-06 17:59:38,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:38,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672471638] [2021-01-06 17:59:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:38,471 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:38,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89655029] [2021-01-06 17:59:38,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:38,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:59:38,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:59:38,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:59:38,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:38,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672471638] [2021-01-06 17:59:38,883 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:38,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89655029] [2021-01-06 17:59:38,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:59:38,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:59:38,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801289231] [2021-01-06 17:59:38,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:59:38,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:38,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:59:38,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:59:38,892 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2021-01-06 17:59:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:39,044 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-01-06 17:59:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:59:39,045 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-01-06 17:59:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:39,046 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:59:39,046 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 17:59:39,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:59:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 17:59:39,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-01-06 17:59:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:59:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 17:59:39,055 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2021-01-06 17:59:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:39,055 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 17:59:39,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:59:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 17:59:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:59:39,056 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:39,056 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:39,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:39,263 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:39,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2052638844, now seen corresponding path program 1 times [2021-01-06 17:59:39,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:39,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544357804] [2021-01-06 17:59:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:39,277 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:39,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971443197] [2021-01-06 17:59:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:59:39,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:39,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:59:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:39,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544357804] [2021-01-06 17:59:39,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:39,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971443197] [2021-01-06 17:59:39,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:59:39,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:59:39,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535336593] [2021-01-06 17:59:39,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:59:39,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:59:39,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:59:39,523 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2021-01-06 17:59:39,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:39,853 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-01-06 17:59:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:59:39,854 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-01-06 17:59:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:39,855 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:59:39,856 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:59:39,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:59:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:59:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 17:59:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:59:39,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 17:59:39,867 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 13 [2021-01-06 17:59:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:39,867 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 17:59:39,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:59:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 17:59:39,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:59:39,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:39,868 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:40,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:40,070 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:40,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2021-01-06 17:59:40,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:40,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785632997] [2021-01-06 17:59:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:40,088 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:40,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816488438] [2021-01-06 17:59:40,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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