/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/prodbin-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:57:14,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:57:14,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:57:14,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:57:14,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:57:14,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:57:14,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:57:15,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:57:15,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:57:15,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:57:15,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:57:15,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:57:15,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:57:15,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:57:15,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:57:15,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:57:15,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:57:15,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:57:15,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:57:15,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:57:15,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:57:15,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:57:15,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:57:15,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:57:15,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:57:15,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:57:15,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:57:15,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:57:15,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:57:15,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:57:15,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:57:15,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:57:15,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:57:15,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:57:15,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:57:15,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:57:15,102 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 17:57:15,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:57:15,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:57:15,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:57:15,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:57:15,153 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:57:15,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:57:15,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:57:15,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:57:15,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:57:15,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:57:15,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:57:15,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:57:15,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:57:15,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:57:15,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:57:15,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:57:15,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:57:15,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:57:15,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:57:15,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:57:15,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:57:15,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:57:15,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:57:15,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:57:15,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:57:15,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:57:15,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:57:15,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:57:15,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:57:15,673 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:57:15,674 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:57:15,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2021-01-06 17:57:15,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2478bfb09/50f70712df684bb8a484654ef978d2dc/FLAGda3b5ecbe [2021-01-06 17:57:16,450 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:57:16,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2021-01-06 17:57:16,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2478bfb09/50f70712df684bb8a484654ef978d2dc/FLAGda3b5ecbe [2021-01-06 17:57:16,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2478bfb09/50f70712df684bb8a484654ef978d2dc [2021-01-06 17:57:16,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:57:16,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:57:16,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:57:16,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:57:16,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:57:16,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:57:16" (1/1) ... [2021-01-06 17:57:16,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3b2ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:16, skipping insertion in model container [2021-01-06 17:57:16,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:57:16" (1/1) ... [2021-01-06 17:57:16,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:57:16,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:57:16,976 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/prodbin-ll_unwindbound10.c[537,550] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~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[~y~0,] [2021-01-06 17:57:16,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:57:17,004 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:57:17,018 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/prodbin-ll_unwindbound10.c[537,550] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~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[~y~0,] [2021-01-06 17:57:17,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:57:17,041 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:57:17,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17 WrapperNode [2021-01-06 17:57:17,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:57:17,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:57:17,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:57:17,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:57:17,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:57:17,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:57:17,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:57:17,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:57:17,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:57:17,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:57:17,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:57:17,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:57:17,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:57:17,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:57:17,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:57:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:57:17,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:57:17,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:57:17,609 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 17:57:17,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:17 BoogieIcfgContainer [2021-01-06 17:57:17,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:57:17,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:57:17,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:57:17,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:57:17,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:57:16" (1/3) ... [2021-01-06 17:57:17,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@213d4196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:57:17, skipping insertion in model container [2021-01-06 17:57:17,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (2/3) ... [2021-01-06 17:57:17,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@213d4196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:57:17, skipping insertion in model container [2021-01-06 17:57:17,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:17" (3/3) ... [2021-01-06 17:57:17,631 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound10.c [2021-01-06 17:57:17,648 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:57:17,653 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:57:17,675 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:57:17,780 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:57:17,780 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:57:17,780 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:57:17,781 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:57:17,781 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:57:17,781 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:57:17,781 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:57:17,781 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:57:17,809 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 17:57:17,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:57:17,815 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:17,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:17,816 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2021-01-06 17:57:17,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:17,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70180446] [2021-01-06 17:57:17,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:18,004 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 17:57:18,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70180446] [2021-01-06 17:57:18,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:18,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:57:18,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334538405] [2021-01-06 17:57:18,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:57:18,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:18,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:57:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:57:18,031 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 17:57:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:18,049 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-01-06 17:57:18,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:57:18,050 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 17:57:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:18,060 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:57:18,061 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:57:18,064 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 17:57:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:57:18,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 17:57:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:57:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 17:57:18,101 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-01-06 17:57:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:18,101 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 17:57:18,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:57:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 17:57:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:57:18,102 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:18,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:18,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:57:18,103 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:18,104 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-01-06 17:57:18,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:18,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575197712] [2021-01-06 17:57:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:18,126 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:18,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402163304] [2021-01-06 17:57:18,127 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 17:57:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:18,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:57:18,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:18,395 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 17:57:18,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575197712] [2021-01-06 17:57:18,395 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:18,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402163304] [2021-01-06 17:57:18,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:18,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:57:18,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662352832] [2021-01-06 17:57:18,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:57:18,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:18,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:57:18,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:57:18,400 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2021-01-06 17:57:18,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:18,587 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-01-06 17:57:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:57:18,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 17:57:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:18,589 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:57:18,589 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:57:18,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:57:18,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:57:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-01-06 17:57:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:57:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-01-06 17:57:18,597 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2021-01-06 17:57:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:18,598 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-01-06 17:57:18,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:57:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-01-06 17:57:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:57:18,599 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:18,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:18,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:57:18,813 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:18,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:18,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2021-01-06 17:57:18,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:18,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744441749] [2021-01-06 17:57:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:18,902 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 17:57:18,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744441749] [2021-01-06 17:57:18,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:18,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:57:18,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986317532] [2021-01-06 17:57:18,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:57:18,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:18,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:57:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:57:18,905 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2021-01-06 17:57:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:18,920 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 17:57:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:57:18,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 17:57:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:18,921 INFO L225 Difference]: With dead ends: 24 [2021-01-06 17:57:18,921 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:57:18,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:57:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:57:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 17:57:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:57:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 17:57:18,928 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2021-01-06 17:57:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:18,928 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 17:57:18,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:57:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 17:57:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:57:18,929 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:18,929 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:18,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:57:18,930 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:18,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2021-01-06 17:57:18,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:18,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100560043] [2021-01-06 17:57:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:18,949 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:18,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991397803] [2021-01-06 17:57:18,951 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 17:57:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:19,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:57:19,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:19,249 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:19,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:19,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:57:21,358 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 17:57:21,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100560043] [2021-01-06 17:57:21,359 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:21,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991397803] [2021-01-06 17:57:21,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:21,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:57:21,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298108080] [2021-01-06 17:57:21,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:57:21,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:21,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:57:21,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:57:21,362 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2021-01-06 17:57:25,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:25,765 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-01-06 17:57:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:57:25,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2021-01-06 17:57:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:25,768 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:57:25,768 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:57:25,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:57:25,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:57:25,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2021-01-06 17:57:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:57:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-01-06 17:57:25,781 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2021-01-06 17:57:25,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:25,782 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-01-06 17:57:25,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:57:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-01-06 17:57:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:57:25,784 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:25,784 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:25,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:25,998 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1174976442, now seen corresponding path program 1 times [2021-01-06 17:57:26,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:26,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717843550] [2021-01-06 17:57:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:26,013 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:26,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300095549] [2021-01-06 17:57:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:57:26,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:26,224 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:26,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:26,253 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:57:28,305 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 17:57:28,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717843550] [2021-01-06 17:57:28,305 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:28,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300095549] [2021-01-06 17:57:28,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:28,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:57:28,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61015045] [2021-01-06 17:57:28,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:57:28,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:28,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:57:28,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:57:28,308 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2021-01-06 17:57:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:28,737 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-01-06 17:57:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:57:28,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 17:57:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:28,738 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:57:28,738 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:57:28,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:57:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:57:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-01-06 17:57:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:57:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-01-06 17:57:28,746 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2021-01-06 17:57:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:28,747 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-01-06 17:57:28,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:57:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-01-06 17:57:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:57:28,748 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:28,748 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:28,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:28,962 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:28,963 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2021-01-06 17:57:28,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:28,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548036720] [2021-01-06 17:57:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:28,976 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:28,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011772745] [2021-01-06 17:57:28,977 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 17:57:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:29,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:57:29,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:29,068 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 17:57:29,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548036720] [2021-01-06 17:57:29,068 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:29,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011772745] [2021-01-06 17:57:29,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:29,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:57:29,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691332224] [2021-01-06 17:57:29,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:57:29,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:29,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:57:29,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:57:29,071 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2021-01-06 17:57:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:29,096 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-01-06 17:57:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:57:29,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 17:57:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:29,097 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:57:29,097 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:57:29,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:57:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:57:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 17:57:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:57:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-01-06 17:57:29,104 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2021-01-06 17:57:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:29,104 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-01-06 17:57:29,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:57:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-01-06 17:57:29,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:57:29,105 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:29,106 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:29,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:29,318 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:29,320 INFO L82 PathProgramCache]: Analyzing trace with hash -935436432, now seen corresponding path program 1 times [2021-01-06 17:57:29,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:29,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10963632] [2021-01-06 17:57:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:29,332 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:29,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976351699] [2021-01-06 17:57:29,333 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 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 [2021-01-06 17:57:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:29,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:57:29,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:29,722 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-01-06 17:57:29,736 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2021-01-06 17:57:29,737 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:29,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10963632] [2021-01-06 17:57:29,831 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:29,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976351699] [2021-01-06 17:57:29,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:29,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:57:29,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93003216] [2021-01-06 17:57:29,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:57:29,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:29,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:57:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:57:29,833 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 10 states. [2021-01-06 17:57:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:34,528 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-01-06 17:57:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:57:34,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2021-01-06 17:57:34,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:34,530 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:57:34,530 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:57:34,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:57:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:57:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-01-06 17:57:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:57:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 17:57:34,536 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2021-01-06 17:57:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:34,536 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 17:57:34,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:57:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 17:57:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:57:34,537 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:34,537 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:34,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 17:57:34,749 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:34,751 INFO L82 PathProgramCache]: Analyzing trace with hash -300473268, now seen corresponding path program 2 times [2021-01-06 17:57:34,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:34,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884390467] [2021-01-06 17:57:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:34,766 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:34,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786364873] [2021-01-06 17:57:34,766 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 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 [2021-01-06 17:57:34,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:57:34,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:57:34,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 17:57:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:36,946 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x~0 (* 2 c_ULTIMATE.start_main_~a~0)) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~z~0) (= c_ULTIMATE.start_main_~y~0 (div (+ c_ULTIMATE.start_main_~b~0 (- 1)) 2)) (<= 1 (mod c_ULTIMATE.start_main_~b~0 2)) (let ((.cse0 (= (+ c_ULTIMATE.start_main_~z~0 (* c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0)) (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~b~0)))) (or (and (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse0)))) (<= 1 c_ULTIMATE.start_main_~b~0)) is different from false [2021-01-06 17:57:45,142 WARN L197 SmtUtils]: Spent 6.17 s on a formula simplification that was a NOOP. DAG size: 22 [2021-01-06 17:57:53,229 WARN L197 SmtUtils]: Spent 6.06 s on a formula simplification that was a NOOP. DAG size: 25 [2021-01-06 17:58:01,535 WARN L197 SmtUtils]: Spent 8.27 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-01-06 17:58:06,743 WARN L197 SmtUtils]: Spent 5.16 s on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-01-06 17:58:06,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884390467] [2021-01-06 17:58:06,780 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:06,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786364873] [2021-01-06 17:58:06,780 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:58:06,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:58:06,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:58:06,781 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:58:06,781 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:58:07,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:07,025 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:58:07,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:58:07 BoogieIcfgContainer [2021-01-06 17:58:07,026 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:58:07,027 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:58:07,029 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:58:07,029 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:58:07,030 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:17" (3/4) ... [2021-01-06 17:58:07,034 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:58:07,034 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:58:07,036 INFO L168 Benchmark]: Toolchain (without parser) took 50248.76 ms. Allocated memory was 161.5 MB in the beginning and 196.1 MB in the end (delta: 34.6 MB). Free memory was 136.1 MB in the beginning and 88.7 MB in the end (delta: 47.4 MB). Peak memory consumption was 82.8 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:07,037 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 161.5 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:58:07,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.10 ms. Allocated memory is still 161.5 MB. Free memory was 135.9 MB in the beginning and 126.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:07,048 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.61 ms. Allocated memory is still 161.5 MB. Free memory was 126.1 MB in the beginning and 124.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:07,050 INFO L168 Benchmark]: Boogie Preprocessor took 24.76 ms. Allocated memory is still 161.5 MB. Free memory was 124.7 MB in the beginning and 123.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:07,053 INFO L168 Benchmark]: RCFGBuilder took 504.07 ms. Allocated memory is still 161.5 MB. Free memory was 123.5 MB in the beginning and 110.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:07,055 INFO L168 Benchmark]: TraceAbstraction took 49409.12 ms. Allocated memory was 161.5 MB in the beginning and 196.1 MB in the end (delta: 34.6 MB). Free memory was 110.0 MB in the beginning and 89.2 MB in the end (delta: 20.8 MB). Peak memory consumption was 56.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:07,056 INFO L168 Benchmark]: Witness Printer took 7.28 ms. Allocated memory is still 196.1 MB. Free memory was 89.2 MB in the beginning and 88.7 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:58:07,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 161.5 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.10 ms. Allocated memory is still 161.5 MB. Free memory was 135.9 MB in the beginning and 126.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.61 ms. Allocated memory is still 161.5 MB. Free memory was 126.1 MB in the beginning and 124.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.76 ms. Allocated memory is still 161.5 MB. Free memory was 124.7 MB in the beginning and 123.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 504.07 ms. Allocated memory is still 161.5 MB. Free memory was 123.5 MB in the beginning and 110.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 49409.12 ms. Allocated memory was 161.5 MB in the beginning and 196.1 MB in the end (delta: 34.6 MB). Free memory was 110.0 MB in the beginning and 89.2 MB in the end (delta: 20.8 MB). Peak memory consumption was 56.6 MB. Max. memory is 8.0 GB. * Witness Printer took 7.28 ms. Allocated memory is still 196.1 MB. Free memory was 89.2 MB in the beginning and 88.7 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int counter = 0; [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L10] COND FALSE !(!cond) [L29] x = a [L30] y = b [L31] z = 0 [L33] EXPR counter++ [L33] COND TRUE counter++<10 [L13] COND FALSE !(!(cond)) [L35] COND FALSE !(!(y != 0)) [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 [L42] x = 2 * x [L43] y = y / 2 [L33] EXPR counter++ [L33] COND TRUE counter++<10 [L13] COND FALSE !(!(cond)) [L35] COND FALSE !(!(y != 0)) [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 [L42] x = 2 * x [L43] y = y / 2 [L33] EXPR counter++ [L33] COND TRUE counter++<10 [L13] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 49.2s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 9.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 282 SDslu, 166 SDs, 0 SdLazy, 222 SolverSat, 64 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 38 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 78 ConstructedInterpolants, 1 QuantifiedInterpolants, 7714 SizeOfPredicates, 37 NumberOfNonLiveVariables, 406 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 0/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...