/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:05:57,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:05:57,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:05:57,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 23:05:57,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:05:57,608 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:05:57,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:05:57,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:05:57,611 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:05:57,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:05:57,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:05:57,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:05:57,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:05:57,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:05:57,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:05:57,612 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:05:57,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:05:57,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:05:57,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:05:57,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:05:57,613 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:05:57,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:05:57,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:05:57,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:05:57,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:05:57,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:05:57,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:05:57,614 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:05:58,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:05:58,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:05:58,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:05:58,064 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:05:58,064 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:05:58,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2021-02-23 23:05:58,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/825343c5b/455eb08ed4844393aa86fac91c770714/FLAGaef2f2505 [2021-02-23 23:05:58,935 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:05:58,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2021-02-23 23:05:58,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/825343c5b/455eb08ed4844393aa86fac91c770714/FLAGaef2f2505 [2021-02-23 23:05:59,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/825343c5b/455eb08ed4844393aa86fac91c770714 [2021-02-23 23:05:59,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:05:59,336 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:05:59,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:59,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:05:59,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:05:59,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:59" (1/1) ... [2021-02-23 23:05:59,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38297924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:59, skipping insertion in model container [2021-02-23 23:05:59,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:59" (1/1) ... [2021-02-23 23:05:59,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:05:59,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:05:59,520 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i[300,313] [2021-02-23 23:05:59,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:59,549 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:05:59,563 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i[300,313] [2021-02-23 23:05:59,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:59,580 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:05:59,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:59 WrapperNode [2021-02-23 23:05:59,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:59,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:05:59,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:05:59,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:05:59,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:59" (1/1) ... [2021-02-23 23:05:59,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:59" (1/1) ... [2021-02-23 23:05:59,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:59" (1/1) ... [2021-02-23 23:05:59,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:59" (1/1) ... [2021-02-23 23:05:59,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:59" (1/1) ... [2021-02-23 23:05:59,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:59" (1/1) ... [2021-02-23 23:05:59,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:59" (1/1) ... [2021-02-23 23:05:59,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:05:59,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:05:59,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:05:59,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:05:59,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:59" (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 [2021-02-23 23:05:59,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:05:59,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:05:59,722 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:05:59,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-02-23 23:05:59,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:05:59,722 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:05:59,723 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:05:59,723 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:05:59,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:05:59,723 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-02-23 23:05:59,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:05:59,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:05:59,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:05:59,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:05:59,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:05:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:05:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:05:59,963 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:05:59,963 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 23:05:59,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:59 BoogieIcfgContainer [2021-02-23 23:05:59,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:05:59,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:05:59,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:05:59,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:05:59,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:05:59" (1/3) ... [2021-02-23 23:05:59,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdda497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:59, skipping insertion in model container [2021-02-23 23:05:59,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:59" (2/3) ... [2021-02-23 23:05:59,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdda497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:59, skipping insertion in model container [2021-02-23 23:05:59,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:59" (3/3) ... [2021-02-23 23:05:59,977 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2021-02-23 23:05:59,987 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:05:59,994 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:06:00,036 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:06:00,098 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:06:00,098 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:06:00,098 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:06:00,098 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:06:00,098 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:06:00,099 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:06:00,099 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:06:00,099 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:06:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-02-23 23:06:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 23:06:00,164 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:06:00,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:06:00,166 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:06:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:06:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2063667912, now seen corresponding path program 1 times [2021-02-23 23:06:00,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:06:00,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064855458] [2021-02-23 23:06:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:06:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:06:00,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:00,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:00,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:00,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:00,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:00,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:00,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:00,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:00,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:00,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:00,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:06:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:06:00,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:00,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:06:00,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064855458] [2021-02-23 23:06:00,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:06:00,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 23:06:00,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356266661] [2021-02-23 23:06:00,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 23:06:00,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:06:00,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 23:06:00,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-23 23:06:00,649 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2021-02-23 23:06:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:06:00,948 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-02-23 23:06:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 23:06:00,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2021-02-23 23:06:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:06:00,961 INFO L225 Difference]: With dead ends: 50 [2021-02-23 23:06:00,962 INFO L226 Difference]: Without dead ends: 29 [2021-02-23 23:06:00,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-02-23 23:06:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-23 23:06:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-02-23 23:06:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-02-23 23:06:01,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-02-23 23:06:01,017 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 20 [2021-02-23 23:06:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:06:01,017 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-02-23 23:06:01,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 23:06:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-02-23 23:06:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 23:06:01,019 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:06:01,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:06:01,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:06:01,020 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:06:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:06:01,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1997383635, now seen corresponding path program 1 times [2021-02-23 23:06:01,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:06:01,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186181201] [2021-02-23 23:06:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:06:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:06:01,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:01,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:01,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:01,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:01,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:01,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:01,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:01,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:01,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:01,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:01,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:01,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:01,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:01,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:01,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:06:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:06:01,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:01,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:06:01,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186181201] [2021-02-23 23:06:01,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:06:01,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-23 23:06:01,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436590569] [2021-02-23 23:06:01,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 23:06:01,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:06:01,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 23:06:01,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-23 23:06:01,159 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 8 states. [2021-02-23 23:06:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:06:01,500 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-02-23 23:06:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 23:06:01,501 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-02-23 23:06:01,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:06:01,503 INFO L225 Difference]: With dead ends: 37 [2021-02-23 23:06:01,503 INFO L226 Difference]: Without dead ends: 34 [2021-02-23 23:06:01,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-02-23 23:06:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-23 23:06:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-02-23 23:06:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-23 23:06:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-02-23 23:06:01,519 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 25 [2021-02-23 23:06:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:06:01,519 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-02-23 23:06:01,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 23:06:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-02-23 23:06:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-23 23:06:01,521 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:06:01,521 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:06:01,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:06:01,522 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:06:01,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:06:01,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2002485672, now seen corresponding path program 2 times [2021-02-23 23:06:01,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:06:01,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759522152] [2021-02-23 23:06:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:06:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:06:01,549 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:06:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:06:01,570 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:06:01,604 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 23:06:01,604 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 23:06:01,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:06:01,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:06:01 BoogieIcfgContainer [2021-02-23 23:06:01,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:06:01,646 INFO L168 Benchmark]: Toolchain (without parser) took 2321.32 ms. Allocated memory was 160.4 MB in the beginning and 192.9 MB in the end (delta: 32.5 MB). Free memory was 137.5 MB in the beginning and 145.6 MB in the end (delta: -8.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 8.0 GB. [2021-02-23 23:06:01,647 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:06:01,648 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.27 ms. Allocated memory is still 160.4 MB. Free memory was 136.2 MB in the beginning and 127.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 23:06:01,649 INFO L168 Benchmark]: Boogie Preprocessor took 33.63 ms. Allocated memory is still 160.4 MB. Free memory was 127.2 MB in the beginning and 125.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 23:06:01,649 INFO L168 Benchmark]: RCFGBuilder took 349.76 ms. Allocated memory is still 160.4 MB. Free memory was 125.7 MB in the beginning and 113.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-23 23:06:01,651 INFO L168 Benchmark]: TraceAbstraction took 1675.98 ms. Allocated memory was 160.4 MB in the beginning and 192.9 MB in the end (delta: 32.5 MB). Free memory was 112.6 MB in the beginning and 145.6 MB in the end (delta: -33.1 MB). Peak memory consumption was 411.0 kB. Max. memory is 8.0 GB. [2021-02-23 23:06:01,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.27 ms. Allocated memory is still 160.4 MB. Free memory was 136.2 MB in the beginning and 127.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.63 ms. Allocated memory is still 160.4 MB. Free memory was 127.2 MB in the beginning and 125.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 349.76 ms. Allocated memory is still 160.4 MB. Free memory was 125.7 MB in the beginning and 113.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1675.98 ms. Allocated memory was 160.4 MB in the beginning and 192.9 MB in the end (delta: 32.5 MB). Free memory was 112.6 MB in the beginning and 145.6 MB in the end (delta: -33.1 MB). Peak memory consumption was 411.0 kB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int i=0; VAL [i=0] [L15] COND TRUE i<5 VAL [i=0] [L16] i++ VAL [i=1] [L18] (i!=3) ? (0) : __blast_assert () VAL [i=1] [L15] COND TRUE i<5 VAL [i=1] [L16] i++ VAL [i=2] [L18] (i!=3) ? (0) : __blast_assert () VAL [i=2] [L15] COND TRUE i<5 VAL [i=2] [L16] i++ VAL [i=3] [L18] (i!=3) ? (0) : __blast_assert () VAL [i=3] [L18] CALL __blast_assert () [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 52 SDslu, 91 SDs, 0 SdLazy, 87 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=2, 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, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 2897 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/5 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...