/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_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:38:21,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:38:21,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:38:21,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:38:21,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:38:21,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:38:21,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:38:21,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:38:21,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:38:21,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:38:21,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:38:21,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:38:21,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:38:21,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:38:21,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:38:21,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:38:21,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:38:21,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:38:21,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:38:21,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:38:21,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:38:21,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:38:21,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:38:21,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:38:21,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:38:21,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:38:21,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:38:21,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:38:21,815 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:38:21,866 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:38:21,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:38:21,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:38:21,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:38:21,871 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:38:21,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:38:21,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:38:21,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:38:21,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:38:21,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:38:21,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:38:21,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:38:21,874 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:38:21,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:38:21,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:38:21,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:38:21,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:38:21,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:38:21,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:38:21,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:38:21,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:38:21,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:38:21,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:38:21,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:38:21,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:38:21,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:38:22,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:38:22,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:38:22,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:38:22,316 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:38:22,317 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:38:22,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c [2020-12-22 05:38:22,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a436b4fd/dc7680fd5adc4dcb90dc923a9827a70f/FLAG0558be288 [2020-12-22 05:38:22,920 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:38:22,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c [2020-12-22 05:38:22,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a436b4fd/dc7680fd5adc4dcb90dc923a9827a70f/FLAG0558be288 [2020-12-22 05:38:23,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a436b4fd/dc7680fd5adc4dcb90dc923a9827a70f [2020-12-22 05:38:23,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:38:23,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:38:23,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:38:23,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:38:23,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:38:23,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:38:23" (1/1) ... [2020-12-22 05:38:23,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd6509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23, skipping insertion in model container [2020-12-22 05:38:23,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:38:23" (1/1) ... [2020-12-22 05:38:23,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:38:23,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:38:23,505 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c[537,550] [2020-12-22 05:38:23,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:38:23,533 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:38:23,548 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c[537,550] [2020-12-22 05:38:23,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:38:23,572 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:38:23,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23 WrapperNode [2020-12-22 05:38:23,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:38:23,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:38:23,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:38:23,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:38:23,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23" (1/1) ... [2020-12-22 05:38:23,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23" (1/1) ... [2020-12-22 05:38:23,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:38:23,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:38:23,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:38:23,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:38:23,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23" (1/1) ... [2020-12-22 05:38:23,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23" (1/1) ... [2020-12-22 05:38:23,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23" (1/1) ... [2020-12-22 05:38:23,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23" (1/1) ... [2020-12-22 05:38:23,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23" (1/1) ... [2020-12-22 05:38:23,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23" (1/1) ... [2020-12-22 05:38:23,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23" (1/1) ... [2020-12-22 05:38:23,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:38:23,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:38:23,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:38:23,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:38:23,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:38:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:38:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:38:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:38:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:38:24,066 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:38:24,067 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 05:38:24,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:38:24 BoogieIcfgContainer [2020-12-22 05:38:24,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:38:24,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:38:24,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:38:24,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:38:24,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:38:23" (1/3) ... [2020-12-22 05:38:24,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57880f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:38:24, skipping insertion in model container [2020-12-22 05:38:24,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:23" (2/3) ... [2020-12-22 05:38:24,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57880f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:38:24, skipping insertion in model container [2020-12-22 05:38:24,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:38:24" (3/3) ... [2020-12-22 05:38:24,079 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound2.c [2020-12-22 05:38:24,089 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:38:24,095 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:38:24,121 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:38:24,161 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:38:24,164 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:38:24,164 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:38:24,164 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:38:24,165 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:38:24,165 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:38:24,165 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:38:24,165 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:38:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-22 05:38:24,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:38:24,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:24,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:24,218 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:24,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:24,232 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2020-12-22 05:38:24,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:24,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717870145] [2020-12-22 05:38:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:24,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717870145] [2020-12-22 05:38:24,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:38:24,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:38:24,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560076188] [2020-12-22 05:38:24,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:38:24,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:24,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:38:24,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:38:24,518 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-22 05:38:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:24,540 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-12-22 05:38:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:38:24,542 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 05:38:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:24,567 INFO L225 Difference]: With dead ends: 37 [2020-12-22 05:38:24,568 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 05:38:24,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:38:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 05:38:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 05:38:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 05:38:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-22 05:38:24,618 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-12-22 05:38:24,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:24,618 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-22 05:38:24,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:38:24,618 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-22 05:38:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:38:24,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:24,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:24,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:38:24,622 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:24,626 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-22 05:38:24,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:24,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426213171] [2020-12-22 05:38:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:24,675 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:24,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843740760] [2020-12-22 05:38:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:24,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 05:38:24,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:24,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426213171] [2020-12-22 05:38:24,942 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:24,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843740760] [2020-12-22 05:38:24,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:38:24,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:38:24,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740310696] [2020-12-22 05:38:24,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:38:24,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:24,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:38:24,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:38:24,946 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-12-22 05:38:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:26,697 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-22 05:38:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:38:26,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 05:38:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:26,699 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:38:26,699 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 05:38:26,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:38:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 05:38:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-12-22 05:38:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:38:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-22 05:38:26,710 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2020-12-22 05:38:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:26,710 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-22 05:38:26,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:38:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-22 05:38:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 05:38:26,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:26,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:26,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:38:26,926 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:26,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2020-12-22 05:38:26,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:26,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561554514] [2020-12-22 05:38:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:27,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561554514] [2020-12-22 05:38:27,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:38:27,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:38:27,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376876579] [2020-12-22 05:38:27,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:38:27,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:27,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:38:27,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:38:27,012 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-22 05:38:27,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:27,032 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-22 05:38:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:38:27,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 05:38:27,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:27,034 INFO L225 Difference]: With dead ends: 24 [2020-12-22 05:38:27,034 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 05:38:27,035 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 [2020-12-22 05:38:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 05:38:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 05:38:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:38:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-22 05:38:27,040 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2020-12-22 05:38:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:27,040 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-22 05:38:27,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:38:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-22 05:38:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:38:27,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:27,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:27,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 05:38:27,042 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:27,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:27,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2020-12-22 05:38:27,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:27,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291779807] [2020-12-22 05:38:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:27,057 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:27,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86895440] [2020-12-22 05:38:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:27,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 05:38:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:27,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:38:27,626 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:38:27,666 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:38:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:29,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291779807] [2020-12-22 05:38:29,731 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:29,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86895440] [2020-12-22 05:38:29,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:29,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:38:29,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313283509] [2020-12-22 05:38:29,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:38:29,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:29,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:38:29,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:38:29,735 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2020-12-22 05:38:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:30,247 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-22 05:38:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:38:30,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-22 05:38:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:30,249 INFO L225 Difference]: With dead ends: 39 [2020-12-22 05:38:30,250 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 05:38:30,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:38:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 05:38:30,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2020-12-22 05:38:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 05:38:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-22 05:38:30,257 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2020-12-22 05:38:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:30,258 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-22 05:38:30,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:38:30,258 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-22 05:38:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:38:30,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:30,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:30,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:30,474 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:30,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1174976442, now seen corresponding path program 1 times [2020-12-22 05:38:30,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:30,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854307402] [2020-12-22 05:38:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:30,490 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:30,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677014699] [2020-12-22 05:38:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:30,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 05:38:30,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:30,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:38:30,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:38:30,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:38:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:32,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854307402] [2020-12-22 05:38:32,756 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:32,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677014699] [2020-12-22 05:38:32,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:32,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:38:32,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136224209] [2020-12-22 05:38:32,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:38:32,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:32,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:38:32,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:38:32,759 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-12-22 05:38:34,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:34,547 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-12-22 05:38:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:38:34,548 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 05:38:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:34,549 INFO L225 Difference]: With dead ends: 46 [2020-12-22 05:38:34,550 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 05:38:34,551 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 [2020-12-22 05:38:34,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 05:38:34,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2020-12-22 05:38:34,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:38:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-22 05:38:34,558 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2020-12-22 05:38:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:34,559 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-22 05:38:34,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:38:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-22 05:38:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:38:34,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:34,560 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:34,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:34,775 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:34,776 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2020-12-22 05:38:34,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:34,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432381997] [2020-12-22 05:38:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:34,792 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:34,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983871559] [2020-12-22 05:38:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:38:34,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:34,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432381997] [2020-12-22 05:38:34,899 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:34,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983871559] [2020-12-22 05:38:34,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:34,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:38:34,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825120354] [2020-12-22 05:38:34,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:38:34,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:34,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:38:34,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:38:34,910 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-12-22 05:38:34,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:34,940 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-22 05:38:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:38:34,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 05:38:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:34,942 INFO L225 Difference]: With dead ends: 34 [2020-12-22 05:38:34,942 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 05:38:34,942 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 [2020-12-22 05:38:34,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 05:38:34,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 05:38:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:38:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-12-22 05:38:34,949 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2020-12-22 05:38:34,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:34,949 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-12-22 05:38:34,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:38:34,950 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-12-22 05:38:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:38:34,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:34,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:35,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:35,155 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash -935436432, now seen corresponding path program 1 times [2020-12-22 05:38:35,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:35,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324745835] [2020-12-22 05:38:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:35,168 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:35,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629472166] [2020-12-22 05:38:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:35,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:38:35,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:35,455 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-22 05:38:35,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:38:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:35,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324745835] [2020-12-22 05:38:35,554 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:35,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629472166] [2020-12-22 05:38:35,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:35,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:38:35,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757044346] [2020-12-22 05:38:35,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:38:35,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:35,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:38:35,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:38:35,568 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 10 states. [2020-12-22 05:38:38,563 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-22 05:38:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:39,233 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-22 05:38:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:38:39,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-22 05:38:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:39,235 INFO L225 Difference]: With dead ends: 35 [2020-12-22 05:38:39,235 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 05:38:39,236 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 [2020-12-22 05:38:39,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 05:38:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-12-22 05:38:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 05:38:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-22 05:38:39,245 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-12-22 05:38:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:39,245 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-22 05:38:39,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:38:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-22 05:38:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:38:39,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:39,247 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:39,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 05:38:39,461 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:39,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:39,462 INFO L82 PathProgramCache]: Analyzing trace with hash -300473268, now seen corresponding path program 2 times [2020-12-22 05:38:39,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:39,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579542755] [2020-12-22 05:38:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:39,481 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:39,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785858153] [2020-12-22 05:38:39,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:39,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:38:39,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:39,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:38:39,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:39,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579542755] [2020-12-22 05:38:39,597 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:39,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785858153] [2020-12-22 05:38:39,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:39,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:38:39,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919815467] [2020-12-22 05:38:39,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:38:39,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:39,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:38:39,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:38:39,599 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-12-22 05:38:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:39,634 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-22 05:38:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:38:39,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-22 05:38:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:39,636 INFO L225 Difference]: With dead ends: 34 [2020-12-22 05:38:39,636 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 05:38:39,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:38:39,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 05:38:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 05:38:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:38:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 05:38:39,641 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-12-22 05:38:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:39,642 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 05:38:39,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:38:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 05:38:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 05:38:39,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:39,643 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:39,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:39,857 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:39,859 INFO L82 PathProgramCache]: Analyzing trace with hash -724773401, now seen corresponding path program 2 times [2020-12-22 05:38:39,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:39,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965492852] [2020-12-22 05:38:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:39,871 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:39,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449208987] [2020-12-22 05:38:39,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:39,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:38:39,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-22 05:38:39,927 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:38:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:38:39,946 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:38:39,989 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 05:38:39,990 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:38:40,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:40,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:38:40 BoogieIcfgContainer [2020-12-22 05:38:40,247 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:38:40,248 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:38:40,248 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:38:40,248 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:38:40,249 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:38:24" (3/4) ... [2020-12-22 05:38:40,251 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 05:38:40,353 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c-witness.graphml [2020-12-22 05:38:40,353 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:38:40,355 INFO L168 Benchmark]: Toolchain (without parser) took 17046.45 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 125.9 MB in the beginning and 61.8 MB in the end (delta: 64.1 MB). Peak memory consumption was 99.3 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:40,355 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:38:40,356 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.45 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:40,361 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.12 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:40,362 INFO L168 Benchmark]: Boogie Preprocessor took 25.57 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 113.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:40,363 INFO L168 Benchmark]: RCFGBuilder took 425.56 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 127.5 MB in the end (delta: -14.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:40,363 INFO L168 Benchmark]: TraceAbstraction took 16176.44 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 127.1 MB in the beginning and 64.4 MB in the end (delta: 62.7 MB). Peak memory consumption was 97.9 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:40,365 INFO L168 Benchmark]: Witness Printer took 105.86 ms. Allocated memory is still 185.6 MB. Free memory was 64.4 MB in the beginning and 61.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:40,372 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 151.0 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 262.45 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.12 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.57 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 113.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 425.56 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 127.5 MB in the end (delta: -14.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16176.44 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 127.1 MB in the beginning and 64.4 MB in the end (delta: 62.7 MB). Peak memory consumption was 97.9 MB. Max. memory is 8.0 GB. * Witness Printer took 105.86 ms. Allocated memory is still 185.6 MB. Free memory was 64.4 MB in the beginning and 61.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [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) VAL [counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<2 [L13] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(y != 0)) VAL [counter=1] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [counter=1] [L42] x = 2 * x [L43] y = y / 2 VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND TRUE counter++<2 [L13] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(y != 0)) VAL [counter=2] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [counter=2] [L42] x = 2 * x [L43] y = y / 2 VAL [counter=2] [L33] EXPR counter++ VAL [counter=3] [L33] COND FALSE !(counter++<2) [L13] COND TRUE !(cond) VAL [counter=3] [L15] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.0s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 295 SDslu, 191 SDs, 0 SdLazy, 234 SolverSat, 67 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 6.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.1s 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, 8 MinimizatonAttempts, 38 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 97 ConstructedInterpolants, 1 QuantifiedInterpolants, 8721 SizeOfPredicates, 39 NumberOfNonLiveVariables, 512 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 10/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...