/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/loops/trex02-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:17:05,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:17:05,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:17:05,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:17:05,454 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:17:05,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:17:05,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:17:05,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:17:05,485 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:17:05,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:17:05,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:17:05,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:17:05,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:17:05,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:17:05,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:17:05,487 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:17:05,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:17:05,488 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:17:05,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:17:05,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:17:05,488 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:17:05,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:17:05,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:17:05,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:17:05,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:17:05,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:17:05,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:17:05,490 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:17:05,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:17:05,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:17:05,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:17:05,925 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:17:05,926 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:17:05,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-1.c [2021-02-24 00:17:06,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e7d17cb7/39a5fbd2f9034f7abf579a5d31af78c8/FLAGfc42acb64 [2021-02-24 00:17:06,588 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:17:06,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c [2021-02-24 00:17:06,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e7d17cb7/39a5fbd2f9034f7abf579a5d31af78c8/FLAGfc42acb64 [2021-02-24 00:17:06,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e7d17cb7/39a5fbd2f9034f7abf579a5d31af78c8 [2021-02-24 00:17:06,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:17:06,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:17:06,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:06,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:17:06,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:17:06,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:06" (1/1) ... [2021-02-24 00:17:06,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd40c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:06, skipping insertion in model container [2021-02-24 00:17:06,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:06" (1/1) ... [2021-02-24 00:17:06,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:17:07,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:17:07,157 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c[320,333] [2021-02-24 00:17:07,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:07,181 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:17:07,197 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c[320,333] [2021-02-24 00:17:07,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:07,217 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:17:07,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:07 WrapperNode [2021-02-24 00:17:07,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:07,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:17:07,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:17:07,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:17:07,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:07" (1/1) ... [2021-02-24 00:17:07,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:07" (1/1) ... [2021-02-24 00:17:07,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:07" (1/1) ... [2021-02-24 00:17:07,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:07" (1/1) ... [2021-02-24 00:17:07,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:07" (1/1) ... [2021-02-24 00:17:07,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:07" (1/1) ... [2021-02-24 00:17:07,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:07" (1/1) ... [2021-02-24 00:17:07,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:17:07,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:17:07,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:17:07,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:17:07,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:07" (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 [2021-02-24 00:17:07,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:17:07,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:17:07,364 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:17:07,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:17:07,365 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-02-24 00:17:07,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:17:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:17:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:17:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:17:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:17:07,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:17:07,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-24 00:17:07,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:17:07,368 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-02-24 00:17:07,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:17:07,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:17:07,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:17:07,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:17:07,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:17:07,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:17:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:17:07,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:17:07,674 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:17:07,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:07 BoogieIcfgContainer [2021-02-24 00:17:07,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:17:07,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:17:07,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:17:07,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:17:07,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:17:06" (1/3) ... [2021-02-24 00:17:07,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b55467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:07, skipping insertion in model container [2021-02-24 00:17:07,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:07" (2/3) ... [2021-02-24 00:17:07,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b55467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:07, skipping insertion in model container [2021-02-24 00:17:07,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:07" (3/3) ... [2021-02-24 00:17:07,701 INFO L111 eAbstractionObserver]: Analyzing ICFG trex02-1.c [2021-02-24 00:17:07,721 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:17:07,734 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:17:07,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:17:07,847 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:17:07,847 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:17:07,847 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:17:07,847 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:17:07,847 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:17:07,848 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:17:07,848 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:17:07,848 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:17:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2021-02-24 00:17:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 00:17:07,875 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:07,876 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, 1] [2021-02-24 00:17:07,877 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:07,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1993240371, now seen corresponding path program 1 times [2021-02-24 00:17:07,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:07,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032960974] [2021-02-24 00:17:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:08,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:08,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:08,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:08,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:08,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032960974] [2021-02-24 00:17:08,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:08,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:17:08,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863990286] [2021-02-24 00:17:08,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:17:08,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:08,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:17:08,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:17:08,323 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2021-02-24 00:17:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:08,472 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-02-24 00:17:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:17:08,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-24 00:17:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:08,492 INFO L225 Difference]: With dead ends: 50 [2021-02-24 00:17:08,492 INFO L226 Difference]: Without dead ends: 32 [2021-02-24 00:17:08,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:17:08,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-24 00:17:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-02-24 00:17:08,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-24 00:17:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-02-24 00:17:08,577 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2021-02-24 00:17:08,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:08,578 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-02-24 00:17:08,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:17:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-02-24 00:17:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 00:17:08,581 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:08,581 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, 1] [2021-02-24 00:17:08,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:17:08,582 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:08,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2006169665, now seen corresponding path program 1 times [2021-02-24 00:17:08,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:08,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643397588] [2021-02-24 00:17:08,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:08,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:08,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:08,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:08,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:08,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:08,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:08,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:08,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:08,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:08,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643397588] [2021-02-24 00:17:08,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:08,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 00:17:08,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101671774] [2021-02-24 00:17:08,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:17:08,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:08,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:17:08,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:17:08,867 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2021-02-24 00:17:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:09,114 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-02-24 00:17:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:17:09,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-24 00:17:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:09,117 INFO L225 Difference]: With dead ends: 32 [2021-02-24 00:17:09,117 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:17:09,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:17:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:17:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:17:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:17:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:17:09,121 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-02-24 00:17:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:09,125 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:17:09,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:17:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:17:09,127 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:17:09,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:17:09,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:17:09,405 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-24 00:17:09,405 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-24 00:17:09,405 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-24 00:17:09,406 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-24 00:17:09,406 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-24 00:17:09,406 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:17:09,406 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-24 00:17:09,406 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:17:09,406 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true [2021-02-24 00:17:09,406 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (<= ~x~0 0) [2021-02-24 00:17:09,407 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~x~0 |old(~x~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-24 00:17:09,407 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-24 00:17:09,407 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-24 00:17:09,407 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (<= ~x~0 0) [2021-02-24 00:17:09,407 INFO L192 CegarLoopUtils]: At program point L18-1(line 18) the Hoare annotation is: true [2021-02-24 00:17:09,407 INFO L192 CegarLoopUtils]: At program point fooEXIT(lines 17 19) the Hoare annotation is: true [2021-02-24 00:17:09,408 INFO L185 CegarLoopUtils]: At program point fooENTRY(lines 17 19) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2021-02-24 00:17:09,408 INFO L192 CegarLoopUtils]: At program point fooFINAL(lines 17 19) the Hoare annotation is: true [2021-02-24 00:17:09,408 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2021-02-24 00:17:09,408 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:17:09,408 INFO L185 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~x~0 0) [2021-02-24 00:17:09,409 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:17:09,409 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:17:09,410 INFO L192 CegarLoopUtils]: At program point L25(lines 25 26) the Hoare annotation is: true [2021-02-24 00:17:09,410 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 21 29) the Hoare annotation is: true [2021-02-24 00:17:09,410 INFO L192 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: true [2021-02-24 00:17:09,411 INFO L185 CegarLoopUtils]: At program point L23-2(lines 23 27) the Hoare annotation is: (or (<= ~x~0 0) (not (<= |old(~x~0)| 0))) [2021-02-24 00:17:09,411 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 21 29) the Hoare annotation is: true [2021-02-24 00:17:09,411 INFO L185 CegarLoopUtils]: At program point mainENTRY(lines 21 29) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (<= |old(~x~0)| 0))) [2021-02-24 00:17:09,411 INFO L192 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-02-24 00:17:09,411 INFO L192 CegarLoopUtils]: At program point L26-1(lines 23 27) the Hoare annotation is: true [2021-02-24 00:17:09,412 INFO L192 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: true [2021-02-24 00:17:09,412 INFO L192 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: true [2021-02-24 00:17:09,412 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (<= |old(~x~0)| 0))) [2021-02-24 00:17:09,412 INFO L192 CegarLoopUtils]: At program point L22-1(line 22) the Hoare annotation is: true [2021-02-24 00:17:09,412 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-24 00:17:09,412 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-02-24 00:17:09,412 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~x~0 0))) [2021-02-24 00:17:09,413 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)) (not (<= ~x~0 0))) [2021-02-24 00:17:09,413 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~x~0 0))) [2021-02-24 00:17:09,413 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-02-24 00:17:09,413 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~x~0 0))) [2021-02-24 00:17:09,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:17:09 BoogieIcfgContainer [2021-02-24 00:17:09,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:17:09,430 INFO L168 Benchmark]: Toolchain (without parser) took 2467.54 ms. Allocated memory is still 155.2 MB. Free memory was 132.2 MB in the beginning and 92.0 MB in the end (delta: 40.2 MB). Peak memory consumption was 40.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:09,431 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 155.2 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:17:09,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.45 ms. Allocated memory is still 155.2 MB. Free memory was 131.1 MB in the beginning and 121.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:09,435 INFO L168 Benchmark]: Boogie Preprocessor took 33.25 ms. Allocated memory is still 155.2 MB. Free memory was 121.7 MB in the beginning and 120.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:09,436 INFO L168 Benchmark]: RCFGBuilder took 422.72 ms. Allocated memory is still 155.2 MB. Free memory was 120.3 MB in the beginning and 106.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:09,438 INFO L168 Benchmark]: TraceAbstraction took 1745.56 ms. Allocated memory is still 155.2 MB. Free memory was 105.8 MB in the beginning and 92.0 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:09,452 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 155.2 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 242.45 ms. Allocated memory is still 155.2 MB. Free memory was 131.1 MB in the beginning and 121.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.25 ms. Allocated memory is still 155.2 MB. Free memory was 121.7 MB in the beginning and 120.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 422.72 ms. Allocated memory is still 155.2 MB. Free memory was 120.3 MB in the beginning and 106.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1745.56 ms. Allocated memory is still 155.2 MB. Free memory was 105.8 MB in the beginning and 92.0 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for foo Derived contract for procedure foo: 1 - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 17 SDslu, 84 SDs, 0 SdLazy, 56 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 51 PreInvPairs, 58 NumberOfFragments, 135 HoareAnnotationTreeSize, 51 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 39 FomulaSimplificationsInter, 301 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 2280 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 proved your program to be correct! Received shutdown request...