/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-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:03:18,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:03:18,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:03:18,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:03:18,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:03:18,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:03:18,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:03:18,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:03:18,820 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:03:18,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:03:18,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:03:18,826 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:03:18,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:03:18,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:03:18,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:03:18,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:03:18,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:03:18,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:03:18,828 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:03:18,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:03:18,829 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:03:18,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:03:18,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:03:18,830 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:03:18,830 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:03:18,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:03:18,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:03:18,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:03:18,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:03:18,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:03:18,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:03:19,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:03:19,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:03:19,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:03:19,303 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:03:19,304 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:03:19,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2020-10-23 22:03:19,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e1f919f8/984c4727acfa45528fd68329a106eabf/FLAGb82dbda31 [2020-10-23 22:03:19,954 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:03:19,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c [2020-10-23 22:03:19,962 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e1f919f8/984c4727acfa45528fd68329a106eabf/FLAGb82dbda31 [2020-10-23 22:03:20,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e1f919f8/984c4727acfa45528fd68329a106eabf [2020-10-23 22:03:20,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:03:20,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:03:20,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:03:20,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:03:20,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:03:20,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:03:20" (1/1) ... [2020-10-23 22:03:20,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16da4384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:20, skipping insertion in model container [2020-10-23 22:03:20,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:03:20" (1/1) ... [2020-10-23 22:03:20,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:03:20,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:03:20,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:03:20,535 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:03:20,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:03:20,572 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:03:20,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:20 WrapperNode [2020-10-23 22:03:20,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:03:20,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:03:20,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:03:20,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:03:20,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:20" (1/1) ... [2020-10-23 22:03:20,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:20" (1/1) ... [2020-10-23 22:03:20,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:20" (1/1) ... [2020-10-23 22:03:20,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:20" (1/1) ... [2020-10-23 22:03:20,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:20" (1/1) ... [2020-10-23 22:03:20,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:20" (1/1) ... [2020-10-23 22:03:20,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:20" (1/1) ... [2020-10-23 22:03:20,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:03:20,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:03:20,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:03:20,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:03:20,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:03:20,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:03:20,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:03:20,702 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:03:20,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:03:20,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:03:20,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:03:20,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:03:20,703 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:03:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:03:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 22:03:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:03:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:03:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:03:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:03:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:03:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:03:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:03:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:03:21,189 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:03:21,189 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:03:21,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:03:21 BoogieIcfgContainer [2020-10-23 22:03:21,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:03:21,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:03:21,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:03:21,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:03:21,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:03:20" (1/3) ... [2020-10-23 22:03:21,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25fb19d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:03:21, skipping insertion in model container [2020-10-23 22:03:21,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:20" (2/3) ... [2020-10-23 22:03:21,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25fb19d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:03:21, skipping insertion in model container [2020-10-23 22:03:21,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:03:21" (3/3) ... [2020-10-23 22:03:21,215 INFO L111 eAbstractionObserver]: Analyzing ICFG eq1.c [2020-10-23 22:03:21,229 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:03:21,235 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:03:21,251 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:03:21,278 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:03:21,278 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:03:21,278 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:03:21,279 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:03:21,279 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:03:21,279 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:03:21,279 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:03:21,279 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:03:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-10-23 22:03:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 22:03:21,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:21,311 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, 1] [2020-10-23 22:03:21,311 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:21,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1433783201, now seen corresponding path program 1 times [2020-10-23 22:03:21,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:21,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211213102] [2020-10-23 22:03:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:21,415 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:21,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:21,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211213102] [2020-10-23 22:03:21,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:21,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 22:03:21,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69729189] [2020-10-23 22:03:21,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 22:03:21,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:21,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 22:03:21,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:03:21,684 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 3 states. [2020-10-23 22:03:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:21,841 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-10-23 22:03:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 22:03:21,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-23 22:03:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:21,854 INFO L225 Difference]: With dead ends: 71 [2020-10-23 22:03:21,854 INFO L226 Difference]: Without dead ends: 48 [2020-10-23 22:03:21,858 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 [2020-10-23 22:03:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-23 22:03:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-23 22:03:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 22:03:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-23 22:03:21,917 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 30 [2020-10-23 22:03:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:21,918 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-23 22:03:21,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 22:03:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-23 22:03:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 22:03:21,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:21,920 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, 1, 1] [2020-10-23 22:03:21,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:03:21,921 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:21,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1781714449, now seen corresponding path program 1 times [2020-10-23 22:03:21,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:21,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969756877] [2020-10-23 22:03:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:21,926 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:22,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:22,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969756877] [2020-10-23 22:03:22,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:22,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 22:03:22,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250988776] [2020-10-23 22:03:22,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 22:03:22,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:22,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 22:03:22,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:03:22,239 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 7 states. [2020-10-23 22:03:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:23,021 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-10-23 22:03:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 22:03:23,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-23 22:03:23,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:23,026 INFO L225 Difference]: With dead ends: 79 [2020-10-23 22:03:23,026 INFO L226 Difference]: Without dead ends: 72 [2020-10-23 22:03:23,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-23 22:03:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-23 22:03:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 49. [2020-10-23 22:03:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 22:03:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-23 22:03:23,047 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 31 [2020-10-23 22:03:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:23,047 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-23 22:03:23,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 22:03:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-23 22:03:23,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 22:03:23,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:23,049 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:23,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:03:23,050 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:23,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:23,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1781189194, now seen corresponding path program 1 times [2020-10-23 22:03:23,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:23,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232317442] [2020-10-23 22:03:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:23,878 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-23 22:03:23,891 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:23,894 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:24,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:24,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232317442] [2020-10-23 22:03:24,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:24,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 22:03:24,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877347119] [2020-10-23 22:03:24,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 22:03:24,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:24,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 22:03:24,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-23 22:03:24,253 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 9 states. [2020-10-23 22:03:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:25,071 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-10-23 22:03:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 22:03:25,073 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-23 22:03:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:25,076 INFO L225 Difference]: With dead ends: 84 [2020-10-23 22:03:25,076 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 22:03:25,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-23 22:03:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 22:03:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2020-10-23 22:03:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-23 22:03:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-23 22:03:25,116 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 41 [2020-10-23 22:03:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:25,116 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-23 22:03:25,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 22:03:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-23 22:03:25,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 22:03:25,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:25,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:25,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:03:25,118 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:25,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:25,119 INFO L82 PathProgramCache]: Analyzing trace with hash -612801078, now seen corresponding path program 1 times [2020-10-23 22:03:25,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:25,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270896961] [2020-10-23 22:03:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:26,105 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-10-23 22:03:26,111 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:26,114 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:26,410 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 21 [2020-10-23 22:03:26,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:26,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270896961] [2020-10-23 22:03:26,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:26,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 22:03:26,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206180366] [2020-10-23 22:03:26,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 22:03:26,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:26,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 22:03:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 22:03:26,520 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 9 states. [2020-10-23 22:03:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:27,307 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-10-23 22:03:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 22:03:27,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-23 22:03:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:27,312 INFO L225 Difference]: With dead ends: 84 [2020-10-23 22:03:27,313 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 22:03:27,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-23 22:03:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 22:03:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-10-23 22:03:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 22:03:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-23 22:03:27,353 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 41 [2020-10-23 22:03:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:27,354 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-23 22:03:27,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 22:03:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-23 22:03:27,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 22:03:27,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:27,356 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:27,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 22:03:27,357 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:27,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1459914853, now seen corresponding path program 1 times [2020-10-23 22:03:27,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:27,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490444072] [2020-10-23 22:03:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:27,934 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-23 22:03:28,540 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-23 22:03:29,654 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-23 22:03:30,278 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-23 22:03:30,279 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:30,282 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:30,870 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2020-10-23 22:03:30,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:31,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490444072] [2020-10-23 22:03:31,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:31,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 22:03:31,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134454875] [2020-10-23 22:03:31,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 22:03:31,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 22:03:31,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-23 22:03:31,025 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 11 states. [2020-10-23 22:03:31,640 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-23 22:03:31,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:31,907 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-10-23 22:03:31,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 22:03:31,907 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-23 22:03:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:31,909 INFO L225 Difference]: With dead ends: 71 [2020-10-23 22:03:31,909 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 22:03:31,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-23 22:03:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 22:03:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 22:03:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 22:03:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 22:03:31,911 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-10-23 22:03:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:31,912 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 22:03:31,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 22:03:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 22:03:31,912 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 22:03:31,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 22:03:31,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 22:03:33,534 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,534 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,534 INFO L277 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,535 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,535 INFO L277 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,536 INFO L277 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,536 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 22:03:33,536 INFO L277 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,536 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-23 22:03:33,536 INFO L277 CegarLoopResult]: At program point L3-5(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,537 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,538 INFO L277 CegarLoopResult]: At program point L3-6(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,538 INFO L277 CegarLoopResult]: At program point L3-7(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,538 INFO L277 CegarLoopResult]: At program point L3-8(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,538 INFO L277 CegarLoopResult]: At program point L3-9(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,538 INFO L277 CegarLoopResult]: At program point L3-10(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,539 INFO L270 CegarLoopResult]: 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)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 22:03:33,539 INFO L277 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,539 INFO L277 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: true [2020-10-23 22:03:33,539 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-23 22:03:33,539 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-23 22:03:33,539 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 22:03:33,540 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 22:03:33,540 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-23 22:03:33,546 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 11 25) the Hoare annotation is: true [2020-10-23 22:03:33,547 INFO L277 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-10-23 22:03:33,547 INFO L270 CegarLoopResult]: At program point L17(lines 17 21) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,547 INFO L270 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,547 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (= main_~x~0 main_~w~0) [2020-10-23 22:03:33,548 INFO L270 CegarLoopResult]: At program point L17-3(line 17) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,548 INFO L277 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-10-23 22:03:33,548 INFO L270 CegarLoopResult]: At program point L17-4(lines 16 22) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,549 INFO L277 CegarLoopResult]: At program point mainFINAL(lines 11 25) the Hoare annotation is: true [2020-10-23 22:03:33,549 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 11 25) the Hoare annotation is: true [2020-10-23 22:03:33,549 INFO L270 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,550 INFO L270 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,550 INFO L270 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,550 INFO L270 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2020-10-23 22:03:33,550 INFO L270 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,550 INFO L270 CegarLoopResult]: At program point L20-3(line 20) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2020-10-23 22:03:33,550 INFO L270 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2020-10-23 22:03:33,551 INFO L270 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2020-10-23 22:03:33,551 INFO L270 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,551 INFO L270 CegarLoopResult]: At program point L18-3(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2020-10-23 22:03:33,551 INFO L270 CegarLoopResult]: At program point L20-5(line 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,551 INFO L270 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= main_~x~0 main_~w~0) [2020-10-23 22:03:33,551 INFO L270 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2020-10-23 22:03:33,552 INFO L270 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: (= main_~x~0 main_~w~0) [2020-10-23 22:03:33,552 INFO L270 CegarLoopResult]: At program point L16-3(line 16) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,552 INFO L270 CegarLoopResult]: At program point L18-5(line 18) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,552 INFO L277 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-10-23 22:03:33,552 INFO L270 CegarLoopResult]: At program point L16-4(lines 16 22) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-10-23 22:03:33,552 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-23 22:03:33,552 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2020-10-23 22:03:33,553 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 22:03:33,553 INFO L270 CegarLoopResult]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-23 22:03:33,555 INFO L270 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 22:03:33,555 INFO L277 CegarLoopResult]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2020-10-23 22:03:33,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:03:33 BoogieIcfgContainer [2020-10-23 22:03:33,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 22:03:33,582 INFO L168 Benchmark]: Toolchain (without parser) took 13259.27 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 128.1 MB in the beginning and 120.1 MB in the end (delta: 8.0 MB). Peak memory consumption was 120.1 MB. Max. memory is 8.0 GB. [2020-10-23 22:03:33,584 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:03:33,586 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.52 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 22:03:33,594 INFO L168 Benchmark]: Boogie Preprocessor took 40.87 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 22:03:33,595 INFO L168 Benchmark]: RCFGBuilder took 578.93 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 133.7 MB in the end (delta: -17.8 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. [2020-10-23 22:03:33,596 INFO L168 Benchmark]: TraceAbstraction took 12376.88 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 133.2 MB in the beginning and 120.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 125.9 MB. Max. memory is 8.0 GB. [2020-10-23 22:03:33,604 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 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 242.52 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.87 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 578.93 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 133.7 MB in the end (delta: -17.8 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12376.88 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 133.2 MB in the beginning and 120.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 125.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: x == w && z == y - ProcedureContractResult [Line: 3]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 11]: 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 5 procedures, 58 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.6s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 220 SDtfs, 317 SDslu, 425 SDs, 0 SdLazy, 644 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=4, 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, 48 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 58 LocationsWithAnnotation, 98 PreInvPairs, 126 NumberOfFragments, 261 HoareAnnotationTreeSize, 98 FomulaSimplifications, 6932 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 58 FomulaSimplificationsInter, 984 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, 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 correct! Received shutdown request...