/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:57:25,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:57:25,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:57:25,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:57:25,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:57:25,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:57:25,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:57:25,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:57:25,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:57:25,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:57:25,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:57:25,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:57:25,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:57:25,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:57:25,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:57:25,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:57:25,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:57:25,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:57:25,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:57:25,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:57:25,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:57:25,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:57:25,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:57:25,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:57:25,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:57:25,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:57:25,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:57:25,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:57:25,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:57:25,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:57:25,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:57:25,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:57:25,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:57:25,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:57:25,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:57:25,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:57:25,714 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 17:57:25,742 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:57:25,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:57:25,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:57:25,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:57:25,744 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:57:25,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:57:25,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:57:25,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:57:25,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:57:25,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:57:25,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:57:25,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:57:25,746 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:57:25,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:57:25,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:57:25,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:57:25,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:57:25,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:57:25,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:57:25,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:57:25,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:57:25,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:57:25,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:57:25,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:57:25,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:57:25,749 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:57:26,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:57:26,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:57:26,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:57:26,145 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:57:26,146 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:57:26,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2021-01-06 17:57:26,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e938b8bac/bae1a5c4d30e4b61ad7d305241921a94/FLAG00d6c6e22 [2021-01-06 17:57:26,870 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:57:26,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2021-01-06 17:57:26,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e938b8bac/bae1a5c4d30e4b61ad7d305241921a94/FLAG00d6c6e22 [2021-01-06 17:57:27,264 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e938b8bac/bae1a5c4d30e4b61ad7d305241921a94 [2021-01-06 17:57:27,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:57:27,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:57:27,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:57:27,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:57:27,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:57:27,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:57:27" (1/1) ... [2021-01-06 17:57:27,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ef4fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27, skipping insertion in model container [2021-01-06 17:57:27,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:57:27" (1/1) ... [2021-01-06 17:57:27,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:57:27,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:57:27,526 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_unwindbound20.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 17:57:27,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:57:27,568 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:57:27,585 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_unwindbound20.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 17:57:27,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:57:27,623 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:57:27,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27 WrapperNode [2021-01-06 17:57:27,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:57:27,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:57:27,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:57:27,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:57:27,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27" (1/1) ... [2021-01-06 17:57:27,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27" (1/1) ... [2021-01-06 17:57:27,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:57:27,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:57:27,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:57:27,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:57:27,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27" (1/1) ... [2021-01-06 17:57:27,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27" (1/1) ... [2021-01-06 17:57:27,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27" (1/1) ... [2021-01-06 17:57:27,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27" (1/1) ... [2021-01-06 17:57:27,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27" (1/1) ... [2021-01-06 17:57:27,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27" (1/1) ... [2021-01-06 17:57:27,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27" (1/1) ... [2021-01-06 17:57:27,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:57:27,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:57:27,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:57:27,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:57:27,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27" (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 17:57:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:57:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:57:27,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:57:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:57:28,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:57:28,038 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 17:57:28,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:28 BoogieIcfgContainer [2021-01-06 17:57:28,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:57:28,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:57:28,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:57:28,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:57:28,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:57:27" (1/3) ... [2021-01-06 17:57:28,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25337c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:57:28, skipping insertion in model container [2021-01-06 17:57:28,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:27" (2/3) ... [2021-01-06 17:57:28,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25337c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:57:28, skipping insertion in model container [2021-01-06 17:57:28,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:28" (3/3) ... [2021-01-06 17:57:28,071 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound20.c [2021-01-06 17:57:28,078 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:57:28,083 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:57:28,105 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:57:28,140 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:57:28,140 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:57:28,140 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:57:28,140 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:57:28,141 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:57:28,141 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:57:28,141 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:57:28,141 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:57:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 17:57:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:57:28,169 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:28,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:28,171 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:28,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:28,179 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2021-01-06 17:57:28,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:28,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121730323] [2021-01-06 17:57:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:28,444 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 17:57:28,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121730323] [2021-01-06 17:57:28,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:28,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:57:28,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115788711] [2021-01-06 17:57:28,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:57:28,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:28,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:57:28,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:57:28,474 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 17:57:28,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:28,494 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-01-06 17:57:28,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:57:28,496 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 17:57:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:28,506 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:57:28,506 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:57:28,510 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 17:57:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:57:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 17:57:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:57:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 17:57:28,549 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-01-06 17:57:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:28,549 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 17:57:28,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:57:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 17:57:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:57:28,550 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:28,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:28,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:57:28,551 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-01-06 17:57:28,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:28,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027514094] [2021-01-06 17:57:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:28,585 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:28,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122686951] [2021-01-06 17:57:28,585 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 17:57:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:28,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:57:28,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:28,888 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 17:57:28,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027514094] [2021-01-06 17:57:28,889 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:28,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122686951] [2021-01-06 17:57:28,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:28,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:57:28,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109079979] [2021-01-06 17:57:28,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:57:28,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:28,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:57:28,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:57:28,893 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2021-01-06 17:57:29,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:29,058 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-01-06 17:57:29,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:57:29,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 17:57:29,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:29,060 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:57:29,061 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:57:29,062 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 17:57:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:57:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-01-06 17:57:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:57:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-01-06 17:57:29,073 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2021-01-06 17:57:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:29,073 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-01-06 17:57:29,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:57:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-01-06 17:57:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:57:29,074 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:29,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:29,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:57:29,288 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:29,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2021-01-06 17:57:29,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:29,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951944145] [2021-01-06 17:57:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:29,345 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 17:57:29,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951944145] [2021-01-06 17:57:29,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:29,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:57:29,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308845699] [2021-01-06 17:57:29,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:57:29,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:29,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:57:29,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:57:29,349 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2021-01-06 17:57:29,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:29,364 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 17:57:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:57:29,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 17:57:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:29,366 INFO L225 Difference]: With dead ends: 24 [2021-01-06 17:57:29,366 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:57:29,367 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 17:57:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:57:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 17:57:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:57:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 17:57:29,373 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2021-01-06 17:57:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:29,373 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 17:57:29,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:57:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 17:57:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:57:29,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:29,374 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:29,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:57:29,375 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:29,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:29,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2021-01-06 17:57:29,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:29,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424826886] [2021-01-06 17:57:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:29,392 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:29,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501477958] [2021-01-06 17:57:29,393 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 17:57:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:57:29,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:29,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:29,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:29,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:57:29,868 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 17:57:29,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424826886] [2021-01-06 17:57:29,869 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:29,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501477958] [2021-01-06 17:57:29,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:29,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:57:29,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146201862] [2021-01-06 17:57:29,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:57:29,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:57:29,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:57:29,875 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2021-01-06 17:57:30,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:30,232 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-01-06 17:57:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:57:30,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2021-01-06 17:57:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:30,234 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:57:30,234 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:57:30,235 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 17:57:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:57:30,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2021-01-06 17:57:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:57:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-01-06 17:57:30,241 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2021-01-06 17:57:30,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:30,241 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-01-06 17:57:30,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:57:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-01-06 17:57:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:57:30,242 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:30,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:30,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:30,444 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1174976442, now seen corresponding path program 1 times [2021-01-06 17:57:30,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:30,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318538451] [2021-01-06 17:57:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:30,460 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:30,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88980038] [2021-01-06 17:57:30,460 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 17:57:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:30,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:57:30,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:30,677 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:30,698 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:30,726 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:57:32,779 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 17:57:32,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318538451] [2021-01-06 17:57:32,780 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:32,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88980038] [2021-01-06 17:57:32,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:32,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:57:32,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192334667] [2021-01-06 17:57:32,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:57:32,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:57:32,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:57:32,783 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2021-01-06 17:57:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:37,175 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-01-06 17:57:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:57:37,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 17:57:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:37,177 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:57:37,177 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:57:37,177 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 17:57:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:57:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-01-06 17:57:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:57:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-01-06 17:57:37,184 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2021-01-06 17:57:37,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:37,185 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-01-06 17:57:37,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:57:37,185 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-01-06 17:57:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:57:37,186 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:37,186 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:37,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:37,393 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:37,394 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2021-01-06 17:57:37,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:37,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088936697] [2021-01-06 17:57:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:37,416 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:37,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899646680] [2021-01-06 17:57:37,416 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 17:57:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:37,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:57:37,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:37,516 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 17:57:37,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088936697] [2021-01-06 17:57:37,517 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:37,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899646680] [2021-01-06 17:57:37,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:37,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:57:37,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458131842] [2021-01-06 17:57:37,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:57:37,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:37,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:57:37,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:57:37,520 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2021-01-06 17:57:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:37,549 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-01-06 17:57:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:57:37,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 17:57:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:37,550 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:57:37,551 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:57:37,551 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 17:57:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:57:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 17:57:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:57:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-01-06 17:57:37,557 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2021-01-06 17:57:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:37,557 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-01-06 17:57:37,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:57:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-01-06 17:57:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:57:37,558 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:37,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:37,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:37,774 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:37,775 INFO L82 PathProgramCache]: Analyzing trace with hash -935436432, now seen corresponding path program 1 times [2021-01-06 17:57:37,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:37,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709562260] [2021-01-06 17:57:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:37,788 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:37,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353579273] [2021-01-06 17:57:37,788 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 17:57:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:37,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:57:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:38,656 WARN L197 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-01-06 17:57:38,666 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2021-01-06 17:57:38,666 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:38,777 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 17:57:38,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709562260] [2021-01-06 17:57:38,778 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:38,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353579273] [2021-01-06 17:57:38,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:38,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:57:38,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821031794] [2021-01-06 17:57:38,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:57:38,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:38,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:57:38,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:57:38,780 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 10 states. [2021-01-06 17:57:41,662 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-01-06 17:57:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:41,849 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-01-06 17:57:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:57:41,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2021-01-06 17:57:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:41,850 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:57:41,850 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:57:41,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:57:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:57:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-01-06 17:57:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:57:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 17:57:41,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2021-01-06 17:57:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:41,865 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 17:57:41,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:57:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 17:57:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:57:41,866 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:41,867 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:42,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 17:57:42,080 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:42,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:42,081 INFO L82 PathProgramCache]: Analyzing trace with hash -300473268, now seen corresponding path program 2 times [2021-01-06 17:57:42,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:42,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267211032] [2021-01-06 17:57:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:42,098 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:42,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089898240] [2021-01-06 17:57:42,099 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 17:57:42,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:57:42,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:57:42,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 17:57:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:44,349 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 17:57:50,544 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 22 [2021-01-06 17:57:58,626 WARN L197 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 25 [2021-01-06 17:58:07,335 WARN L197 SmtUtils]: Spent 8.68 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-01-06 17:58:13,545 WARN L197 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-01-06 17:58:13,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267211032] [2021-01-06 17:58:13,565 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:13,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089898240] [2021-01-06 17:58:13,565 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:58:13,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:58:13,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:58:13,566 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:58:13,566 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:58:13,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:13,803 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:58:13,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:58:13 BoogieIcfgContainer [2021-01-06 17:58:13,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:58:13,806 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:58:13,807 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:58:13,807 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:58:13,808 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:28" (3/4) ... [2021-01-06 17:58:13,814 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:58:13,815 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:58:13,817 INFO L168 Benchmark]: Toolchain (without parser) took 46546.37 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 128.5 MB in the beginning and 141.5 MB in the end (delta: -13.0 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:13,817 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:58:13,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.86 ms. Allocated memory is still 152.0 MB. Free memory was 128.2 MB in the beginning and 118.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:13,828 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.14 ms. Allocated memory is still 152.0 MB. Free memory was 118.4 MB in the beginning and 116.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:13,830 INFO L168 Benchmark]: Boogie Preprocessor took 24.06 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 115.9 MB in the end (delta: 998.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:13,833 INFO L168 Benchmark]: RCFGBuilder took 352.37 ms. Allocated memory is still 152.0 MB. Free memory was 115.7 MB in the beginning and 102.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:13,834 INFO L168 Benchmark]: TraceAbstraction took 45743.53 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 135.5 MB in the beginning and 141.5 MB in the end (delta: -6.0 MB). Peak memory consumption was 24.8 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:13,834 INFO L168 Benchmark]: Witness Printer took 8.89 ms. Allocated memory is still 182.5 MB. Free memory is still 141.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:58:13,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 351.86 ms. Allocated memory is still 152.0 MB. Free memory was 128.2 MB in the beginning and 118.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.14 ms. Allocated memory is still 152.0 MB. Free memory was 118.4 MB in the beginning and 116.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.06 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 115.9 MB in the end (delta: 998.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 352.37 ms. Allocated memory is still 152.0 MB. Free memory was 115.7 MB in the beginning and 102.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 45743.53 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 135.5 MB in the beginning and 141.5 MB in the end (delta: -6.0 MB). Peak memory consumption was 24.8 MB. Max. memory is 8.0 GB. * Witness Printer took 8.89 ms. Allocated memory is still 182.5 MB. Free memory is still 141.5 MB. 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++<20 [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++<20 [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++<20 [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: 45.6s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 97 SDtfs, 284 SDslu, 163 SDs, 0 SdLazy, 222 SolverSat, 65 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.2s 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, 0.1s SatisfiabilityAnalysisTime, 3.9s 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...