/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/loops/sum03-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:40:30,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:40:30,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:40:30,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 16:40:30,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:40:30,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:40:30,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:40:30,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:40:30,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:40:30,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:40:30,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:40:30,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:40:30,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:40:30,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:40:30,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:40:30,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:40:30,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:40:30,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:40:30,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:40:30,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:40:30,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:40:30,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:40:30,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:40:30,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:40:30,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:40:30,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:40:30,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:40:30,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:40:30,876 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 16:40:30,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:40:30,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:40:30,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:40:30,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:40:30,930 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:40:30,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:40:30,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:40:30,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:40:30,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:40:30,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:40:30,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:40:30,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:40:30,933 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:40:30,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:40:30,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:40:30,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:40:30,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:40:30,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:40:30,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:40:30,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:40:30,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:40:30,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:40:30,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:40:30,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:40:30,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:40:30,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:40:31,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:40:31,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:40:31,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:40:31,392 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:40:31,393 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:40:31,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum03-1.i [2021-01-06 16:40:31,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9c1c9b89a/b5c1b8a851ee48e5b28ac0025aa364ab/FLAGd1a4e859e [2021-01-06 16:40:32,051 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:40:32,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum03-1.i [2021-01-06 16:40:32,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9c1c9b89a/b5c1b8a851ee48e5b28ac0025aa364ab/FLAGd1a4e859e [2021-01-06 16:40:32,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9c1c9b89a/b5c1b8a851ee48e5b28ac0025aa364ab [2021-01-06 16:40:32,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:40:32,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:40:32,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:40:32,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:40:32,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:40:32,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:40:32" (1/1) ... [2021-01-06 16:40:32,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ecbbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32, skipping insertion in model container [2021-01-06 16:40:32,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:40:32" (1/1) ... [2021-01-06 16:40:32,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:40:32,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:40:32,597 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/loops/sum03-1.i[807,820] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2021-01-06 16:40:32,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:40:32,624 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:40:32,639 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/loops/sum03-1.i[807,820] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2021-01-06 16:40:32,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:40:32,660 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:40:32,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32 WrapperNode [2021-01-06 16:40:32,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:40:32,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:40:32,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:40:32,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:40:32,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32" (1/1) ... [2021-01-06 16:40:32,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32" (1/1) ... [2021-01-06 16:40:32,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:40:32,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:40:32,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:40:32,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:40:32,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32" (1/1) ... [2021-01-06 16:40:32,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32" (1/1) ... [2021-01-06 16:40:32,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32" (1/1) ... [2021-01-06 16:40:32,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32" (1/1) ... [2021-01-06 16:40:32,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32" (1/1) ... [2021-01-06 16:40:32,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32" (1/1) ... [2021-01-06 16:40:32,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32" (1/1) ... [2021-01-06 16:40:32,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:40:32,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:40:32,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:40:32,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:40:32,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32" (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 16:40:32,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:40:32,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:40:32,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:40:32,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:40:33,080 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:40:33,080 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:40:33,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:33 BoogieIcfgContainer [2021-01-06 16:40:33,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:40:33,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:40:33,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:40:33,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:40:33,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:40:32" (1/3) ... [2021-01-06 16:40:33,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ae3154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:40:33, skipping insertion in model container [2021-01-06 16:40:33,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:32" (2/3) ... [2021-01-06 16:40:33,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ae3154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:40:33, skipping insertion in model container [2021-01-06 16:40:33,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:33" (3/3) ... [2021-01-06 16:40:33,093 INFO L111 eAbstractionObserver]: Analyzing ICFG sum03-1.i [2021-01-06 16:40:33,100 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:40:33,105 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:40:33,133 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:40:33,166 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:40:33,166 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:40:33,166 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:40:33,166 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:40:33,167 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:40:33,167 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:40:33,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:40:33,167 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:40:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-01-06 16:40:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:40:33,191 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:33,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:33,193 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:33,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:33,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1810721996, now seen corresponding path program 1 times [2021-01-06 16:40:33,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:33,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169794908] [2021-01-06 16:40:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:33,471 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 16:40:33,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169794908] [2021-01-06 16:40:33,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:33,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:40:33,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805491901] [2021-01-06 16:40:33,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:40:33,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:33,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:40:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:40:33,499 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2021-01-06 16:40:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:33,582 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-01-06 16:40:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:40:33,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-01-06 16:40:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:33,599 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:40:33,599 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:40:33,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:40:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2021-01-06 16:40:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:40:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-01-06 16:40:33,640 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-01-06 16:40:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:33,640 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-01-06 16:40:33,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:40:33,641 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-01-06 16:40:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:40:33,641 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:33,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:33,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:40:33,642 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:33,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:33,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1810662414, now seen corresponding path program 1 times [2021-01-06 16:40:33,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:33,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746977583] [2021-01-06 16:40:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:33,857 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 16:40:33,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746977583] [2021-01-06 16:40:33,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:33,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 16:40:33,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771402142] [2021-01-06 16:40:33,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:40:33,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:33,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:40:33,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:33,863 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2021-01-06 16:40:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:33,923 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2021-01-06 16:40:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:40:33,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 16:40:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:33,926 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:40:33,926 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:40:33,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:40:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:40:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:40:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 16:40:33,932 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2021-01-06 16:40:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:33,932 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 16:40:33,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:40:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 16:40:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:40:33,933 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:33,933 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:33,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:40:33,934 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:33,935 INFO L82 PathProgramCache]: Analyzing trace with hash -491357631, now seen corresponding path program 1 times [2021-01-06 16:40:33,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:33,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022688968] [2021-01-06 16:40:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:34,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022688968] [2021-01-06 16:40:34,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271783235] [2021-01-06 16:40:34,140 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 16:40:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:34,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:40:34,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:34,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:34,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:40:34,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041027500] [2021-01-06 16:40:34,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:40:34,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:34,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:40:34,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:34,347 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2021-01-06 16:40:34,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:34,396 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-01-06 16:40:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:40:34,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 16:40:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:34,400 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:40:34,400 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:40:34,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:40:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-01-06 16:40:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:40:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 16:40:34,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-01-06 16:40:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:34,418 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 16:40:34,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:40:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 16:40:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:40:34,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:34,420 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 16:40:34,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:40:34,634 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:34,634 INFO L82 PathProgramCache]: Analyzing trace with hash -491417213, now seen corresponding path program 1 times [2021-01-06 16:40:34,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:34,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15810633] [2021-01-06 16:40:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:34,844 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 16:40:34,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15810633] [2021-01-06 16:40:34,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702599290] [2021-01-06 16:40:34,845 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 16:40:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:34,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:40:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:35,044 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:40:35,067 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 16:40:35,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:35,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-01-06 16:40:35,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893833936] [2021-01-06 16:40:35,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:40:35,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:35,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:40:35,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:40:35,070 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 11 states. [2021-01-06 16:40:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:35,263 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-01-06 16:40:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:40:35,264 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 16:40:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:35,265 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:40:35,265 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:40:35,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:40:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:40:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-01-06 16:40:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 16:40:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-01-06 16:40:35,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2021-01-06 16:40:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:35,277 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-01-06 16:40:35,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:40:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-01-06 16:40:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:40:35,279 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:35,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 16:40:35,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:35,494 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:35,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1969109706, now seen corresponding path program 2 times [2021-01-06 16:40:35,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:35,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709725890] [2021-01-06 16:40:35,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:35,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709725890] [2021-01-06 16:40:35,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534489848] [2021-01-06 16:40:35,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:35,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:40:35,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:35,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:40:35,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:35,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:35,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:40:35,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494644507] [2021-01-06 16:40:35,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:40:35,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:35,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:40:35,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:40:35,728 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2021-01-06 16:40:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:35,760 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-01-06 16:40:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:40:35,761 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 16:40:35,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:35,762 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:40:35,762 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:40:35,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:40:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:40:35,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-01-06 16:40:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:40:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 16:40:35,768 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2021-01-06 16:40:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:35,769 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 16:40:35,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:40:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 16:40:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:40:35,770 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:35,770 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1] [2021-01-06 16:40:35,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:35,984 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:35,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1700040107, now seen corresponding path program 3 times [2021-01-06 16:40:35,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:35,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521704127] [2021-01-06 16:40:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:36,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521704127] [2021-01-06 16:40:36,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424228550] [2021-01-06 16:40:36,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:40:36,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:40:36,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:40:36,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:36,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:36,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:40:36,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201814187] [2021-01-06 16:40:36,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:40:36,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:36,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:40:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:40:36,377 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2021-01-06 16:40:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:36,433 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-01-06 16:40:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:40:36,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-01-06 16:40:36,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:36,435 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:40:36,435 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:40:36,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:40:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:40:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-01-06 16:40:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:40:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-01-06 16:40:36,441 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2021-01-06 16:40:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:36,441 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-01-06 16:40:36,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:40:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-01-06 16:40:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:40:36,442 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:36,443 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-01-06 16:40:36,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:36,650 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:36,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:36,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1613491296, now seen corresponding path program 4 times [2021-01-06 16:40:36,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:36,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793897371] [2021-01-06 16:40:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:36,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793897371] [2021-01-06 16:40:36,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700027517] [2021-01-06 16:40:36,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 16:40:36,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:40:36,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:36,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:40:36,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:36,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:36,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:40:36,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038089747] [2021-01-06 16:40:36,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:40:36,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:36,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:40:36,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:40:36,933 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2021-01-06 16:40:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:36,991 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-01-06 16:40:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:40:36,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2021-01-06 16:40:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:36,995 INFO L225 Difference]: With dead ends: 37 [2021-01-06 16:40:36,995 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:40:36,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:40:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:40:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 16:40:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:40:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 16:40:37,010 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2021-01-06 16:40:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:37,010 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 16:40:37,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:40:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 16:40:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:40:37,012 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:37,012 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1] [2021-01-06 16:40:37,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:40:37,227 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:37,227 INFO L82 PathProgramCache]: Analyzing trace with hash -494561515, now seen corresponding path program 5 times [2021-01-06 16:40:37,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:37,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859334396] [2021-01-06 16:40:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:37,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859334396] [2021-01-06 16:40:37,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748411996] [2021-01-06 16:40:37,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 16:40:37,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:40:37,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:37,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:40:37,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:37,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:37,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:40:37,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706297104] [2021-01-06 16:40:37,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:40:37,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:37,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:40:37,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:40:37,846 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2021-01-06 16:40:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:37,923 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-01-06 16:40:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:40:37,924 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2021-01-06 16:40:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:37,927 INFO L225 Difference]: With dead ends: 41 [2021-01-06 16:40:37,927 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 16:40:37,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:40:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 16:40:37,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-01-06 16:40:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 16:40:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-01-06 16:40:37,943 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2021-01-06 16:40:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:37,944 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-01-06 16:40:37,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:40:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-01-06 16:40:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:40:37,946 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:37,946 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1] [2021-01-06 16:40:38,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:38,154 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:38,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1590798326, now seen corresponding path program 6 times [2021-01-06 16:40:38,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:38,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043439736] [2021-01-06 16:40:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:38,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043439736] [2021-01-06 16:40:38,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536692293] [2021-01-06 16:40:38,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:40:39,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 16:40:39,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:39,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:40:39,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:39,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:39,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-01-06 16:40:39,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188506883] [2021-01-06 16:40:39,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:40:39,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:39,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:40:39,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:40:39,776 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 20 states. [2021-01-06 16:40:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:40,389 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-01-06 16:40:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:40:40,389 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2021-01-06 16:40:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:40,390 INFO L225 Difference]: With dead ends: 45 [2021-01-06 16:40:40,390 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 16:40:40,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:40:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 16:40:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-01-06 16:40:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:40:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-01-06 16:40:40,397 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2021-01-06 16:40:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:40,398 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-01-06 16:40:40,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:40:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-01-06 16:40:40,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:40:40,399 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:40,399 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1] [2021-01-06 16:40:40,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:40,604 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1794348671, now seen corresponding path program 7 times [2021-01-06 16:40:40,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:40,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412534492] [2021-01-06 16:40:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:40,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412534492] [2021-01-06 16:40:40,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131707801] [2021-01-06 16:40:40,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:40,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:40:40,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:40,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:40,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:40:40,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988073682] [2021-01-06 16:40:40,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:40:40,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:40,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:40:40,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:40:40,957 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 11 states. [2021-01-06 16:40:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:41,076 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-01-06 16:40:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:40:41,076 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2021-01-06 16:40:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:41,077 INFO L225 Difference]: With dead ends: 49 [2021-01-06 16:40:41,077 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 16:40:41,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:40:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 16:40:41,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-01-06 16:40:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:40:41,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-01-06 16:40:41,084 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 35 [2021-01-06 16:40:41,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:41,084 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-01-06 16:40:41,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:40:41,085 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-01-06 16:40:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:40:41,086 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:41,086 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1] [2021-01-06 16:40:41,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:40:41,302 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:41,303 INFO L82 PathProgramCache]: Analyzing trace with hash 979014260, now seen corresponding path program 8 times [2021-01-06 16:40:41,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:41,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913028704] [2021-01-06 16:40:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:41,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913028704] [2021-01-06 16:40:41,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643484654] [2021-01-06 16:40:41,523 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:41,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:40:41,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:41,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:40:41,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:41,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:41,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:40:41,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850489116] [2021-01-06 16:40:41,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:40:41,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:41,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:40:41,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:40:41,672 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2021-01-06 16:40:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:41,851 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-01-06 16:40:41,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:40:41,852 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2021-01-06 16:40:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:41,853 INFO L225 Difference]: With dead ends: 53 [2021-01-06 16:40:41,853 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 16:40:41,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:40:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 16:40:41,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-01-06 16:40:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:40:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-01-06 16:40:41,886 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2021-01-06 16:40:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:41,886 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-01-06 16:40:41,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:40:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-01-06 16:40:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:40:41,892 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:41,896 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-01-06 16:40:42,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:42,110 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash -985101335, now seen corresponding path program 9 times [2021-01-06 16:40:42,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:42,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750316959] [2021-01-06 16:40:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:42,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750316959] [2021-01-06 16:40:42,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458989735] [2021-01-06 16:40:42,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:42,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:40:42,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:40:42,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:42,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:42,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:40:42,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558190734] [2021-01-06 16:40:42,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:40:42,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:42,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:40:42,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:40:42,938 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 13 states. [2021-01-06 16:40:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:43,114 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-01-06 16:40:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:40:43,115 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2021-01-06 16:40:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:43,116 INFO L225 Difference]: With dead ends: 57 [2021-01-06 16:40:43,116 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 16:40:43,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:40:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 16:40:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-01-06 16:40:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 16:40:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-01-06 16:40:43,122 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2021-01-06 16:40:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:43,122 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-01-06 16:40:43,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:40:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-01-06 16:40:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:40:43,123 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:43,123 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-01-06 16:40:43,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:43,332 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:43,333 INFO L82 PathProgramCache]: Analyzing trace with hash -855457058, now seen corresponding path program 10 times [2021-01-06 16:40:43,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:43,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794726808] [2021-01-06 16:40:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:40:43,468 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:40:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:40:43,577 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:40:43,606 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:40:43,607 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:40:43,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-06 16:40:43,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:40:43 BoogieIcfgContainer [2021-01-06 16:40:43,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:40:43,657 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:40:43,657 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:40:43,657 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:40:43,658 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:33" (3/4) ... [2021-01-06 16:40:43,661 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:40:43,748 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/sum03-1.i-witness.graphml [2021-01-06 16:40:43,748 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:40:43,753 INFO L168 Benchmark]: Toolchain (without parser) took 11344.08 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 130.3 MB in the beginning and 85.8 MB in the end (delta: 44.5 MB). Peak memory consumption was 113.9 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:43,753 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 155.2 MB. Free memory is still 127.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:40:43,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.94 ms. Allocated memory is still 155.2 MB. Free memory was 130.1 MB in the beginning and 120.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:43,756 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.62 ms. Allocated memory is still 155.2 MB. Free memory was 120.5 MB in the beginning and 119.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:43,757 INFO L168 Benchmark]: Boogie Preprocessor took 24.19 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 118.2 MB in the end (delta: 967.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:43,760 INFO L168 Benchmark]: RCFGBuilder took 355.65 ms. Allocated memory is still 155.2 MB. Free memory was 118.1 MB in the beginning and 107.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:43,760 INFO L168 Benchmark]: TraceAbstraction took 10571.90 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 107.0 MB in the beginning and 89.5 MB in the end (delta: 17.4 MB). Peak memory consumption was 87.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:43,761 INFO L168 Benchmark]: Witness Printer took 91.62 ms. Allocated memory is still 224.4 MB. Free memory was 89.5 MB in the beginning and 85.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:43,765 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 155.2 MB. Free memory is still 127.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.94 ms. Allocated memory is still 155.2 MB. Free memory was 130.1 MB in the beginning and 120.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.62 ms. Allocated memory is still 155.2 MB. Free memory was 120.5 MB in the beginning and 119.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.19 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 118.2 MB in the end (delta: 967.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 355.65 ms. Allocated memory is still 155.2 MB. Free memory was 118.1 MB in the beginning and 107.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10571.90 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 107.0 MB in the beginning and 89.5 MB in the end (delta: 17.4 MB). Peak memory consumption was 87.7 MB. Max. memory is 8.0 GB. * Witness Printer took 91.62 ms. Allocated memory is still 224.4 MB. Free memory was 89.5 MB in the beginning and 85.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 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: [L21] int sn=0; [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L23] unsigned int x=0; [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND FALSE !(x<10) [L28] x++ [L14] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.4s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 165 SDtfs, 86 SDslu, 925 SDs, 0 SdLazy, 1115 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 353 GetRequests, 235 SyntacticMatches, 19 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 15 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 569 NumberOfCodeBlocks, 565 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 500 ConstructedInterpolants, 0 QuantifiedInterpolants, 91856 SizeOfPredicates, 19 NumberOfNonLiveVariables, 937 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 180/1328 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...