/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:38:13,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:38:13,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:38:13,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:38:13,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:38:13,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:38:13,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:38:14,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:38:14,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:38:14,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:38:14,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:38:14,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:38:14,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:38:14,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:38:14,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:38:14,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:38:14,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:38:14,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:38:14,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:38:14,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:38:14,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:38:14,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:38:14,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:38:14,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:38:14,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:38:14,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:38:14,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:38:14,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:38:14,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:38:14,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:38:14,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:38:14,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:38:14,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:38:14,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:38:14,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:38:14,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:38:14,085 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:38:14,113 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:38:14,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:38:14,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:38:14,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:38:14,115 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:38:14,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:38:14,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:38:14,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:38:14,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:38:14,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:38:14,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:38:14,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:38:14,117 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:38:14,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:38:14,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:38:14,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:38:14,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:38:14,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:38:14,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:38:14,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:38:14,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:38:14,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:38:14,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:38:14,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:38:14,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:38:14,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:38:14,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:38:14,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:38:14,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:38:14,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:38:14,529 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:38:14,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2020-12-22 05:38:14,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2da0c05b/1fcf3058f0864b2b8b19dd752aad29c4/FLAG59249a547 [2020-12-22 05:38:15,363 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:38:15,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2020-12-22 05:38:15,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2da0c05b/1fcf3058f0864b2b8b19dd752aad29c4/FLAG59249a547 [2020-12-22 05:38:15,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2da0c05b/1fcf3058f0864b2b8b19dd752aad29c4 [2020-12-22 05:38:15,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:38:15,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:38:15,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:38:15,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:38:15,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:38:15,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:38:15" (1/1) ... [2020-12-22 05:38:15,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f2ffaa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15, skipping insertion in model container [2020-12-22 05:38:15,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:38:15" (1/1) ... [2020-12-22 05:38:15,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:38:15,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:38:15,887 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c[537,550] [2020-12-22 05:38:15,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:38:15,913 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:38:15,928 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c[537,550] [2020-12-22 05:38:15,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:38:15,951 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:38:15,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15 WrapperNode [2020-12-22 05:38:15,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:38:15,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:38:15,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:38:15,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:38:15,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15" (1/1) ... [2020-12-22 05:38:15,972 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15" (1/1) ... [2020-12-22 05:38:15,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:38:15,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:38:15,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:38:15,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:38:16,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15" (1/1) ... [2020-12-22 05:38:16,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15" (1/1) ... [2020-12-22 05:38:16,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15" (1/1) ... [2020-12-22 05:38:16,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15" (1/1) ... [2020-12-22 05:38:16,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15" (1/1) ... [2020-12-22 05:38:16,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15" (1/1) ... [2020-12-22 05:38:16,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15" (1/1) ... [2020-12-22 05:38:16,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:38:16,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:38:16,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:38:16,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:38:16,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:38:16,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:38:16,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:38:16,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:38:16,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:38:16,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:38:16,525 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 05:38:16,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:38:16 BoogieIcfgContainer [2020-12-22 05:38:16,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:38:16,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:38:16,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:38:16,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:38:16,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:38:15" (1/3) ... [2020-12-22 05:38:16,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60accf1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:38:16, skipping insertion in model container [2020-12-22 05:38:16,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:38:15" (2/3) ... [2020-12-22 05:38:16,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60accf1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:38:16, skipping insertion in model container [2020-12-22 05:38:16,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:38:16" (3/3) ... [2020-12-22 05:38:16,563 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound1.c [2020-12-22 05:38:16,569 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:38:16,574 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:38:16,605 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:38:16,670 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:38:16,670 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:38:16,671 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:38:16,671 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:38:16,671 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:38:16,671 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:38:16,671 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:38:16,671 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:38:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-22 05:38:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:38:16,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:16,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:16,696 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:16,703 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2020-12-22 05:38:16,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:16,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889531602] [2020-12-22 05:38:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:16,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889531602] [2020-12-22 05:38:16,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:38:16,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:38:16,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245618562] [2020-12-22 05:38:16,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:38:16,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:16,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:38:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:38:16,913 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-22 05:38:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:16,932 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-12-22 05:38:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:38:16,933 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 05:38:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:16,944 INFO L225 Difference]: With dead ends: 37 [2020-12-22 05:38:16,944 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 05:38:16,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:38:16,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 05:38:16,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 05:38:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 05:38:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-22 05:38:16,986 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-12-22 05:38:16,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:16,987 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-22 05:38:16,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:38:16,987 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-22 05:38:16,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:38:16,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:16,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:16,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:38:16,989 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-22 05:38:16,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:16,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941151498] [2020-12-22 05:38:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:17,011 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:17,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284782668] [2020-12-22 05:38:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 05:38:17,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:17,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941151498] [2020-12-22 05:38:17,291 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:17,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284782668] [2020-12-22 05:38:17,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:38:17,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:38:17,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165973703] [2020-12-22 05:38:17,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:38:17,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:17,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:38:17,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:38:17,296 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-12-22 05:38:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:17,607 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-22 05:38:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:38:17,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 05:38:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:17,609 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:38:17,610 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 05:38:17,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:38:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 05:38:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-12-22 05:38:17,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:38:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-22 05:38:17,618 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2020-12-22 05:38:17,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:17,618 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-22 05:38:17,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:38:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-22 05:38:17,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 05:38:17,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:17,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:17,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:38:17,835 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:17,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2020-12-22 05:38:17,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:17,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062200097] [2020-12-22 05:38:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:17,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062200097] [2020-12-22 05:38:17,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:38:17,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:38:17,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556728010] [2020-12-22 05:38:17,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:38:17,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:17,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:38:17,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:38:17,908 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-22 05:38:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:17,929 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-22 05:38:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:38:17,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 05:38:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:17,931 INFO L225 Difference]: With dead ends: 24 [2020-12-22 05:38:17,931 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 05:38:17,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:38:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 05:38:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 05:38:17,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:38:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-22 05:38:17,937 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2020-12-22 05:38:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:17,937 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-22 05:38:17,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:38:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-22 05:38:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:38:17,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:17,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:17,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 05:38:17,939 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:17,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2020-12-22 05:38:17,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:17,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17004002] [2020-12-22 05:38:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:17,957 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:17,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006281565] [2020-12-22 05:38:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:18,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:38:18,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:18,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17004002] [2020-12-22 05:38:18,122 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:18,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006281565] [2020-12-22 05:38:18,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:18,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:38:18,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871822948] [2020-12-22 05:38:18,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:38:18,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:18,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:38:18,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:38:18,125 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-12-22 05:38:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:18,167 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-12-22 05:38:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:38:18,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-22 05:38:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:18,168 INFO L225 Difference]: With dead ends: 28 [2020-12-22 05:38:18,169 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 05:38:18,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:38:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 05:38:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 05:38:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 05:38:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-22 05:38:18,174 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-12-22 05:38:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:18,174 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-22 05:38:18,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:38:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-22 05:38:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:38:18,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:18,176 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:18,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:18,390 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:18,393 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2020-12-22 05:38:18,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:18,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511037019] [2020-12-22 05:38:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:18,413 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:18,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000659150] [2020-12-22 05:38:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:38:18,529 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:38:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:38:18,568 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:38:18,640 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 05:38:18,641 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:38:18,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:18,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:38:18 BoogieIcfgContainer [2020-12-22 05:38:18,909 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:38:18,910 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:38:18,910 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:38:18,910 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:38:18,911 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:38:16" (3/4) ... [2020-12-22 05:38:18,914 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 05:38:18,975 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c-witness.graphml [2020-12-22 05:38:18,975 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:38:18,977 INFO L168 Benchmark]: Toolchain (without parser) took 3271.83 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 123.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:18,978 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:38:18,979 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.12 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:18,980 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.08 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:18,981 INFO L168 Benchmark]: Boogie Preprocessor took 25.69 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 113.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:18,981 INFO L168 Benchmark]: RCFGBuilder took 504.60 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 100.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:18,982 INFO L168 Benchmark]: TraceAbstraction took 2380.18 ms. Allocated memory is still 151.0 MB. Free memory was 99.8 MB in the beginning and 126.2 MB in the end (delta: -26.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:38:18,983 INFO L168 Benchmark]: Witness Printer took 65.18 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 123.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:38:18,987 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.12 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.08 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.69 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 113.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 504.60 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 100.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2380.18 ms. Allocated memory is still 151.0 MB. Free memory was 99.8 MB in the beginning and 126.2 MB in the end (delta: -26.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 65.18 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 123.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L10] COND FALSE !(!cond) VAL [counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<1 [L13] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(y != 0)) VAL [counter=1] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [counter=1] [L42] x = 2 * x [L43] y = y / 2 VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND FALSE !(counter++<1) [L13] COND TRUE !(cond) VAL [counter=2] [L15] reach_error() VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 78 SDslu, 60 SDs, 0 SdLazy, 45 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 991 SizeOfPredicates, 9 NumberOfNonLiveVariables, 149 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/3 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...