/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/lcm2_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:36:47,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:36:47,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:36:47,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:36:47,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:36:47,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:36:47,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:36:47,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:36:47,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:36:47,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:36:47,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:36:47,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:36:47,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:36:47,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:36:47,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:36:47,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:36:47,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:36:47,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:36:47,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:36:47,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:36:47,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:36:47,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:36:47,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:36:47,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:36:47,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:36:47,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:36:47,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:36:47,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:36:47,621 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:36:47,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:36:47,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:36:47,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:36:47,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:36:47,669 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:36:47,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:36:47,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:36:47,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:36:47,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:36:47,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:36:47,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:36:47,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:36:47,672 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:36:47,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:36:47,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:36:47,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:36:47,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:36:47,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:36:47,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:36:47,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:36:47,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:36:47,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:36:47,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:36:47,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:36:47,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:36:47,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:36:48,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:36:48,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:36:48,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:36:48,081 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:36:48,081 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:36:48,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound2.c [2020-12-22 05:36:48,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b095dc01a/b26838689aa745c0b98d41e006fe3351/FLAG4fd98251e [2020-12-22 05:36:48,809 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:36:48,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound2.c [2020-12-22 05:36:48,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b095dc01a/b26838689aa745c0b98d41e006fe3351/FLAG4fd98251e [2020-12-22 05:36:49,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b095dc01a/b26838689aa745c0b98d41e006fe3351 [2020-12-22 05:36:49,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:36:49,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:36:49,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:36:49,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:36:49,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:36:49,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:36:49" (1/1) ... [2020-12-22 05:36:49,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7982e638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49, skipping insertion in model container [2020-12-22 05:36:49,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:36:49" (1/1) ... [2020-12-22 05:36:49,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:36:49,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:36:49,392 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/lcm2_valuebound2.c[537,550] [2020-12-22 05:36:49,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:36:49,419 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:36:49,432 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/lcm2_valuebound2.c[537,550] [2020-12-22 05:36:49,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:36:49,457 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:36:49,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49 WrapperNode [2020-12-22 05:36:49,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:36:49,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:36:49,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:36:49,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:36:49,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49" (1/1) ... [2020-12-22 05:36:49,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49" (1/1) ... [2020-12-22 05:36:49,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:36:49,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:36:49,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:36:49,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:36:49,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49" (1/1) ... [2020-12-22 05:36:49,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49" (1/1) ... [2020-12-22 05:36:49,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49" (1/1) ... [2020-12-22 05:36:49,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49" (1/1) ... [2020-12-22 05:36:49,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49" (1/1) ... [2020-12-22 05:36:49,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49" (1/1) ... [2020-12-22 05:36:49,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49" (1/1) ... [2020-12-22 05:36:49,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:36:49,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:36:49,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:36:49,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:36:49,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49" (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 05:36:49,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:36:49,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:36:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:36:49,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:36:50,083 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:36:50,084 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 05:36:50,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:36:50 BoogieIcfgContainer [2020-12-22 05:36:50,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:36:50,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:36:50,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:36:50,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:36:50,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:36:49" (1/3) ... [2020-12-22 05:36:50,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cca80e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:36:50, skipping insertion in model container [2020-12-22 05:36:50,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:49" (2/3) ... [2020-12-22 05:36:50,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cca80e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:36:50, skipping insertion in model container [2020-12-22 05:36:50,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:36:50" (3/3) ... [2020-12-22 05:36:50,096 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound2.c [2020-12-22 05:36:50,104 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:36:50,110 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:36:50,142 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:36:50,184 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:36:50,185 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:36:50,185 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:36:50,185 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:36:50,185 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:36:50,185 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:36:50,185 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:36:50,186 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:36:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-22 05:36:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:36:50,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:50,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:50,210 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:50,216 INFO L82 PathProgramCache]: Analyzing trace with hash 822857436, now seen corresponding path program 1 times [2020-12-22 05:36:50,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:50,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98076790] [2020-12-22 05:36:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:36:50,459 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 05:36:50,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98076790] [2020-12-22 05:36:50,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:36:50,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:36:50,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155332966] [2020-12-22 05:36:50,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:36:50,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:50,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:36:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:36:50,489 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-12-22 05:36:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:50,513 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2020-12-22 05:36:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:36:50,514 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-22 05:36:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:50,528 INFO L225 Difference]: With dead ends: 53 [2020-12-22 05:36:50,528 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 05:36:50,534 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 05:36:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 05:36:50,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 05:36:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:36:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 05:36:50,578 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2020-12-22 05:36:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:50,578 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 05:36:50,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:36:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 05:36:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:36:50,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:50,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:50,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:36:50,582 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:50,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2114165096, now seen corresponding path program 1 times [2020-12-22 05:36:50,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:50,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439528656] [2020-12-22 05:36:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:50,636 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:50,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747591570] [2020-12-22 05:36:50,637 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 05:36:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:36:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:36:50,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:50,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439528656] [2020-12-22 05:36:50,940 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:50,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747591570] [2020-12-22 05:36:50,940 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-22 05:36:50,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:36:50,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 05:36:50,941 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 05:36:50,941 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:36:51,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:36:51,177 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 05:36:51,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:36:51 BoogieIcfgContainer [2020-12-22 05:36:51,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:36:51,179 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:36:51,179 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:36:51,179 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:36:51,180 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:36:50" (3/4) ... [2020-12-22 05:36:51,184 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 05:36:51,184 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:36:51,189 INFO L168 Benchmark]: Toolchain (without parser) took 2024.40 ms. Allocated memory is still 158.3 MB. Free memory was 114.2 MB in the beginning and 87.1 MB in the end (delta: 27.1 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2020-12-22 05:36:51,190 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 158.3 MB. Free memory is still 131.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:36:51,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.17 ms. Allocated memory is still 158.3 MB. Free memory was 114.2 MB in the beginning and 104.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:36:51,194 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.81 ms. Allocated memory is still 158.3 MB. Free memory was 104.2 MB in the beginning and 102.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:36:51,194 INFO L168 Benchmark]: Boogie Preprocessor took 54.39 ms. Allocated memory is still 158.3 MB. Free memory was 102.7 MB in the beginning and 101.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:36:51,198 INFO L168 Benchmark]: RCFGBuilder took 501.88 ms. Allocated memory is still 158.3 MB. Free memory was 101.6 MB in the beginning and 125.4 MB in the end (delta: -23.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2020-12-22 05:36:51,200 INFO L168 Benchmark]: TraceAbstraction took 1089.72 ms. Allocated memory is still 158.3 MB. Free memory was 125.1 MB in the beginning and 87.3 MB in the end (delta: 37.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 8.0 GB. [2020-12-22 05:36:51,202 INFO L168 Benchmark]: Witness Printer took 5.59 ms. Allocated memory is still 158.3 MB. Free memory was 87.3 MB in the beginning and 87.1 MB in the end (delta: 283.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:36:51,216 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 158.3 MB. Free memory is still 131.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 292.17 ms. Allocated memory is still 158.3 MB. Free memory was 114.2 MB in the beginning and 104.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 69.81 ms. Allocated memory is still 158.3 MB. Free memory was 104.2 MB in the beginning and 102.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.39 ms. Allocated memory is still 158.3 MB. Free memory was 102.7 MB in the beginning and 101.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 501.88 ms. Allocated memory is still 158.3 MB. Free memory was 101.6 MB in the beginning and 125.4 MB in the end (delta: -23.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1089.72 ms. Allocated memory is still 158.3 MB. Free memory was 125.1 MB in the beginning and 87.3 MB in the end (delta: 37.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 8.0 GB. * Witness Printer took 5.59 ms. Allocated memory is still 158.3 MB. Free memory was 87.3 MB in the beginning and 87.1 MB in the end (delta: 283.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] unsigned a, b; [L21] unsigned x, y, u, v; [L22] a = __VERIFIER_nondet_uint() [L9] COND FALSE !(!cond) [L24] b = __VERIFIER_nondet_uint() [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L32] x = a [L33] y = b [L34] u = b [L35] v = a [L37] COND TRUE 1 [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 256 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...