/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:27:16,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:27:16,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:27:16,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:27:16,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:27:16,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:27:16,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:27:16,747 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:27:16,799 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:27:16,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:27:16,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:27:16,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:27:16,802 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:27:16,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:27:16,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:27:16,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:27:16,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:27:16,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:27:16,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:27:16,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:27:16,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:27:16,803 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:27:16,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:27:16,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:27:16,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:27:16,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:27:16,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:27:16,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:27:16,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:27:16,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:27:16,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:27:16,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:27:16,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:27:16,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:27:16,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:27:16,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:27:16,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:27:16,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:27:17,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:27:17,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:27:17,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:27:17,234 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:27:17,235 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:27:17,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-10-23 18:27:17,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebb706afb/72f7244ecf9b4a44b952638cb17524ed/FLAG014575759 [2020-10-23 18:27:17,985 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:27:17,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-10-23 18:27:17,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebb706afb/72f7244ecf9b4a44b952638cb17524ed/FLAG014575759 [2020-10-23 18:27:18,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebb706afb/72f7244ecf9b4a44b952638cb17524ed [2020-10-23 18:27:18,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:27:18,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:27:18,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:27:18,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:27:18,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:27:18,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:27:18" (1/1) ... [2020-10-23 18:27:18,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229afa9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:18, skipping insertion in model container [2020-10-23 18:27:18,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:27:18" (1/1) ... [2020-10-23 18:27:18,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:27:18,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:27:18,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:27:18,572 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:27:18,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:27:18,604 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:27:18,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:18 WrapperNode [2020-10-23 18:27:18,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:27:18,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:27:18,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:27:18,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:27:18,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:18" (1/1) ... [2020-10-23 18:27:18,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:18" (1/1) ... [2020-10-23 18:27:18,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:18" (1/1) ... [2020-10-23 18:27:18,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:18" (1/1) ... [2020-10-23 18:27:18,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:18" (1/1) ... [2020-10-23 18:27:18,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:18" (1/1) ... [2020-10-23 18:27:18,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:18" (1/1) ... [2020-10-23 18:27:18,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:27:18,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:27:18,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:27:18,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:27:18,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:18" (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 [2020-10-23 18:27:18,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:27:18,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:27:18,712 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:27:18,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-10-23 18:27:18,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:27:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:27:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:27:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:27:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:27:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-10-23 18:27:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:27:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:27:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:27:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:27:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:27:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:27:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:27:19,100 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:27:19,101 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:27:19,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:27:19 BoogieIcfgContainer [2020-10-23 18:27:19,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:27:19,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:27:19,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:27:19,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:27:19,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:27:18" (1/3) ... [2020-10-23 18:27:19,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1fac16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:27:19, skipping insertion in model container [2020-10-23 18:27:19,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:27:18" (2/3) ... [2020-10-23 18:27:19,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1fac16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:27:19, skipping insertion in model container [2020-10-23 18:27:19,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:27:19" (3/3) ... [2020-10-23 18:27:19,112 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2020-10-23 18:27:19,128 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:27:19,133 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:27:19,147 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:27:19,179 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:27:19,179 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:27:19,179 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:27:19,180 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:27:19,180 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:27:19,180 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:27:19,180 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:27:19,180 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:27:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-23 18:27:19,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-23 18:27:19,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:27:19,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:27:19,208 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:27:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:27:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash -440394374, now seen corresponding path program 1 times [2020-10-23 18:27:19,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:27:19,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101435111] [2020-10-23 18:27:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:27:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:19,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:27:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:27:19,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101435111] [2020-10-23 18:27:19,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:27:19,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:27:19,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608316495] [2020-10-23 18:27:19,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:27:19,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:27:19,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:27:19,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:27:19,542 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-10-23 18:27:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:27:19,818 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2020-10-23 18:27:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:27:19,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-23 18:27:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:27:19,838 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:27:19,838 INFO L226 Difference]: Without dead ends: 15 [2020-10-23 18:27:19,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:27:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-23 18:27:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-23 18:27:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-23 18:27:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-23 18:27:19,899 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-10-23 18:27:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:27:19,900 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-23 18:27:19,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:27:19,901 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-23 18:27:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:27:19,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:27:19,903 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:27:19,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:27:19,903 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:27:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:27:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1907763863, now seen corresponding path program 1 times [2020-10-23 18:27:19,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:27:19,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530667475] [2020-10-23 18:27:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:27:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:20,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:27:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:27:20,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530667475] [2020-10-23 18:27:20,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942646854] [2020-10-23 18:27:20,129 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 [2020-10-23 18:27:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:27:20,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:27:20,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:27:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:27:20,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:27:20,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-23 18:27:20,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791369699] [2020-10-23 18:27:20,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:27:20,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:27:20,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:27:20,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:27:20,296 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-10-23 18:27:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:27:20,427 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-23 18:27:20,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:27:20,428 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-23 18:27:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:27:20,429 INFO L225 Difference]: With dead ends: 21 [2020-10-23 18:27:20,429 INFO L226 Difference]: Without dead ends: 17 [2020-10-23 18:27:20,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:27:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-23 18:27:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-23 18:27:20,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-23 18:27:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-23 18:27:20,437 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-23 18:27:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:27:20,437 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-23 18:27:20,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:27:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-23 18:27:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:27:20,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:27:20,438 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:27:20,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:27:20,645 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:27:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:27:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash -664968076, now seen corresponding path program 2 times [2020-10-23 18:27:20,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:27:20,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584857264] [2020-10-23 18:27:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:27:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:27:20,677 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:27:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:27:20,710 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:27:20,744 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:27:20,744 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:27:20,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:27:20,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:27:20 BoogieIcfgContainer [2020-10-23 18:27:20,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:27:20,795 INFO L168 Benchmark]: Toolchain (without parser) took 2422.84 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 89.6 MB in the end (delta: 41.8 MB). Peak memory consumption was 42.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:20,796 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory was 97.4 MB in the beginning and 97.3 MB in the end (delta: 120.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:27:20,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.55 ms. Allocated memory is still 156.2 MB. Free memory was 130.9 MB in the beginning and 121.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:20,798 INFO L168 Benchmark]: Boogie Preprocessor took 30.37 ms. Allocated memory is still 156.2 MB. Free memory was 121.8 MB in the beginning and 120.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:20,799 INFO L168 Benchmark]: RCFGBuilder took 466.07 ms. Allocated memory is still 156.2 MB. Free memory was 120.4 MB in the beginning and 134.4 MB in the end (delta: -13.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:20,800 INFO L168 Benchmark]: TraceAbstraction took 1685.54 ms. Allocated memory is still 156.2 MB. Free memory was 133.7 MB in the beginning and 89.6 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:20,804 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory was 97.4 MB in the beginning and 97.3 MB in the end (delta: 120.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 229.55 ms. Allocated memory is still 156.2 MB. Free memory was 130.9 MB in the beginning and 121.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.37 ms. Allocated memory is still 156.2 MB. Free memory was 121.8 MB in the beginning and 120.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 466.07 ms. Allocated memory is still 156.2 MB. Free memory was 120.4 MB in the beginning and 134.4 MB in the end (delta: -13.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1685.54 ms. Allocated memory is still 156.2 MB. Free memory was 133.7 MB in the beginning and 89.6 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0; VAL [i=0] [L15] COND TRUE i<5 [L16] i++ VAL [i=1] [L18] (i!=3) ? (0) : __blast_assert () VAL [i=1] [L15] COND TRUE i<5 [L16] i++ VAL [i=2] [L18] (i!=3) ? (0) : __blast_assert () VAL [i=2] [L15] COND TRUE i<5 [L16] i++ VAL [i=3] [L18] (i!=3) ? (0) : __blast_assert () VAL [i=3] [L18] CALL __blast_assert () [L8] CALL reach_error() [L3] __assert_fail("0", "test_while_int.c_1.i", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 19 SDslu, 39 SDs, 0 SdLazy, 42 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 1280 SizeOfPredicates, 1 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4 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...