/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:06:47,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:06:47,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:06:47,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 02:06:48,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:06:48,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:06:48,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:06:48,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:06:48,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:06:48,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:06:48,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:06:48,136 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:06:48,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:06:48,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:06:48,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:06:48,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:06:48,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:06:48,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:06:48,139 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:06:48,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:06:48,139 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:06:48,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:06:48,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:06:48,141 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:06:48,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:06:48,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:06:48,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:06:48,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:06:48,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:06:48,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:06:48,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:06:48,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:06:48,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:06:48,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:06:48,627 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:06:48,629 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:06:48,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-11-07 02:06:48,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779863fc7/a402abc2420b4de8beaa37d55479ec24/FLAGeebdde5c9 [2020-11-07 02:06:49,588 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:06:49,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-11-07 02:06:49,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779863fc7/a402abc2420b4de8beaa37d55479ec24/FLAGeebdde5c9 [2020-11-07 02:06:49,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779863fc7/a402abc2420b4de8beaa37d55479ec24 [2020-11-07 02:06:49,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:06:49,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:06:49,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:06:49,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:06:49,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:06:49,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:49" (1/1) ... [2020-11-07 02:06:49,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138465d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:49, skipping insertion in model container [2020-11-07 02:06:49,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:49" (1/1) ... [2020-11-07 02:06:49,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:06:50,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:06:50,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:06:50,225 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:06:50,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:06:50,321 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:06:50,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:50 WrapperNode [2020-11-07 02:06:50,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:06:50,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:06:50,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:06:50,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:06:50,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:50" (1/1) ... [2020-11-07 02:06:50,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:50" (1/1) ... [2020-11-07 02:06:50,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:50" (1/1) ... [2020-11-07 02:06:50,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:50" (1/1) ... [2020-11-07 02:06:50,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:50" (1/1) ... [2020-11-07 02:06:50,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:50" (1/1) ... [2020-11-07 02:06:50,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:50" (1/1) ... [2020-11-07 02:06:50,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:06:50,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:06:50,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:06:50,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:06:50,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:50" (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 [2020-11-07 02:06:50,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:06:50,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:06:50,547 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:06:50,548 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:06:50,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:06:50,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:06:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:06:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:06:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 02:06:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 02:06:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:06:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:06:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:06:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:06:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:06:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:06:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:06:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:06:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:06:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:06:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:06:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:06:51,183 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:06:51,183 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 02:06:51,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:06:51 BoogieIcfgContainer [2020-11-07 02:06:51,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:06:51,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:06:51,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:06:51,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:06:51,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:06:49" (1/3) ... [2020-11-07 02:06:51,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed4d237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:06:51, skipping insertion in model container [2020-11-07 02:06:51,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:50" (2/3) ... [2020-11-07 02:06:51,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed4d237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:06:51, skipping insertion in model container [2020-11-07 02:06:51,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:06:51" (3/3) ... [2020-11-07 02:06:51,196 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2020-11-07 02:06:51,210 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:06:51,213 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:06:51,225 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:06:51,253 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:06:51,253 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:06:51,253 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:06:51,254 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:06:51,254 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:06:51,254 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:06:51,254 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:06:51,254 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:06:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-11-07 02:06:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-07 02:06:51,288 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:51,289 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:51,289 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:51,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:51,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1272536975, now seen corresponding path program 1 times [2020-11-07 02:06:51,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:51,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795203395] [2020-11-07 02:06:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:51,407 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:51,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:06:51,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795203395] [2020-11-07 02:06:51,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:51,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 02:06:51,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023505471] [2020-11-07 02:06:51,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 02:06:51,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:51,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 02:06:51,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:06:51,672 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 3 states. [2020-11-07 02:06:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:52,044 INFO L93 Difference]: Finished difference Result 149 states and 221 transitions. [2020-11-07 02:06:52,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 02:06:52,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-11-07 02:06:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:52,060 INFO L225 Difference]: With dead ends: 149 [2020-11-07 02:06:52,060 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 02:06:52,066 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 [2020-11-07 02:06:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 02:06:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-11-07 02:06:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 02:06:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-11-07 02:06:52,153 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 28 [2020-11-07 02:06:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:52,156 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-11-07 02:06:52,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 02:06:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-11-07 02:06:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-07 02:06:52,160 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:52,161 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:52,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:06:52,162 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:52,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:52,163 INFO L82 PathProgramCache]: Analyzing trace with hash -370927728, now seen corresponding path program 1 times [2020-11-07 02:06:52,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:52,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818631491] [2020-11-07 02:06:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:52,173 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:52,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:06:52,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818631491] [2020-11-07 02:06:52,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:52,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:06:52,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923667693] [2020-11-07 02:06:52,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:06:52,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:52,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:06:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:06:52,494 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 6 states. [2020-11-07 02:06:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:53,393 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2020-11-07 02:06:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:06:53,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-11-07 02:06:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:53,397 INFO L225 Difference]: With dead ends: 102 [2020-11-07 02:06:53,398 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 02:06:53,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:06:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 02:06:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-11-07 02:06:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-07 02:06:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2020-11-07 02:06:53,450 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 29 [2020-11-07 02:06:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:53,451 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2020-11-07 02:06:53,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:06:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2020-11-07 02:06:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 02:06:53,453 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:53,454 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:53,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:06:53,454 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:53,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1093511260, now seen corresponding path program 1 times [2020-11-07 02:06:53,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:53,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080385593] [2020-11-07 02:06:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:53,460 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:53,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:53,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-07 02:06:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:06:53,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080385593] [2020-11-07 02:06:53,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:53,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 02:06:53,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89946224] [2020-11-07 02:06:53,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 02:06:53,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:53,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 02:06:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:06:53,674 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand 7 states. [2020-11-07 02:06:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:54,728 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2020-11-07 02:06:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:06:54,729 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-11-07 02:06:54,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:54,731 INFO L225 Difference]: With dead ends: 106 [2020-11-07 02:06:54,731 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 02:06:54,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-07 02:06:54,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 02:06:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-11-07 02:06:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-07 02:06:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2020-11-07 02:06:54,755 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 34 [2020-11-07 02:06:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:54,755 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2020-11-07 02:06:54,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 02:06:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2020-11-07 02:06:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 02:06:54,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:54,757 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:54,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:06:54,758 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash 33274449, now seen corresponding path program 1 times [2020-11-07 02:06:54,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:54,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963512276] [2020-11-07 02:06:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:54,775 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:54,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:54,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-07 02:06:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:06:54,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963512276] [2020-11-07 02:06:54,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:54,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:06:54,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203051734] [2020-11-07 02:06:54,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:06:54,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:54,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:06:54,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:06:54,960 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand 8 states. [2020-11-07 02:06:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:55,642 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2020-11-07 02:06:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:06:55,643 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-11-07 02:06:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:55,645 INFO L225 Difference]: With dead ends: 101 [2020-11-07 02:06:55,645 INFO L226 Difference]: Without dead ends: 97 [2020-11-07 02:06:55,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:06:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-07 02:06:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-11-07 02:06:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 02:06:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2020-11-07 02:06:55,667 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 37 [2020-11-07 02:06:55,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:55,668 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2020-11-07 02:06:55,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:06:55,668 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2020-11-07 02:06:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 02:06:55,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:55,670 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:55,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:06:55,671 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1958904793, now seen corresponding path program 1 times [2020-11-07 02:06:55,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:55,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351720773] [2020-11-07 02:06:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:55,675 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:55,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:55,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-07 02:06:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:55,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:06:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:06:55,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351720773] [2020-11-07 02:06:55,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:55,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:06:55,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057702923] [2020-11-07 02:06:55,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:06:55,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:55,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:06:55,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:06:55,814 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 8 states. [2020-11-07 02:06:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:56,756 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2020-11-07 02:06:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 02:06:56,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-11-07 02:06:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:56,760 INFO L225 Difference]: With dead ends: 131 [2020-11-07 02:06:56,760 INFO L226 Difference]: Without dead ends: 126 [2020-11-07 02:06:56,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-07 02:06:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-07 02:06:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2020-11-07 02:06:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-07 02:06:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2020-11-07 02:06:56,791 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 47 [2020-11-07 02:06:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:56,792 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2020-11-07 02:06:56,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:06:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2020-11-07 02:06:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 02:06:56,794 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:56,795 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:56,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:06:56,795 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash 602823005, now seen corresponding path program 1 times [2020-11-07 02:06:56,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:56,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299859708] [2020-11-07 02:06:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:56,898 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-07 02:06:56,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-07 02:06:57,802 WARN L194 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-11-07 02:06:57,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-07 02:06:57,836 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 02:06:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:06:57,899 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:06:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:06:57,933 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:06:57,982 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 02:06:57,983 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 02:06:57,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:06:58,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:06:58 BoogieIcfgContainer [2020-11-07 02:06:58,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 02:06:58,006 INFO L168 Benchmark]: Toolchain (without parser) took 8041.02 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 128.5 MB in the beginning and 100.3 MB in the end (delta: 28.2 MB). Peak memory consumption was 59.2 MB. Max. memory is 8.0 GB. [2020-11-07 02:06:58,007 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:06:58,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.23 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 118.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 02:06:58,009 INFO L168 Benchmark]: Boogie Preprocessor took 100.19 ms. Allocated memory is still 151.0 MB. Free memory was 118.0 MB in the beginning and 116.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 02:06:58,010 INFO L168 Benchmark]: RCFGBuilder took 757.49 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 131.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. [2020-11-07 02:06:58,011 INFO L168 Benchmark]: TraceAbstraction took 6816.48 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 130.8 MB in the beginning and 100.3 MB in the end (delta: 30.5 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. [2020-11-07 02:06:58,015 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 345.23 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 118.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 100.19 ms. Allocated memory is still 151.0 MB. Free memory was 118.0 MB in the beginning and 116.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 757.49 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 131.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6816.48 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 130.8 MB in the beginning and 100.3 MB in the end (delta: 30.5 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int tagbuf_len; [L27] int t; [L28] tagbuf_len = __VERIFIER_nondet_int() [L29] COND TRUE tagbuf_len >= 1 [L30] t = 0 [L31] --tagbuf_len [L32] COND TRUE 1 [L33] COND FALSE !(t == tagbuf_len) [L38] COND FALSE !(__VERIFIER_nondet_int()) [L41] CALL __VERIFIER_assert(0 <= t) [L18] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(0 <= t) [L42] CALL __VERIFIER_assert(t <= tagbuf_len) [L18] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(t <= tagbuf_len) [L43] t++ [L32] COND TRUE 1 [L33] COND TRUE t == tagbuf_len [L34] CALL __VERIFIER_assert(0 <= t) [L18] COND TRUE !(cond) [L19] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "assert.h", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 92 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 386 SDtfs, 484 SDslu, 379 SDs, 0 SdLazy, 1304 SolverSat, 210 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...