/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-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:08:43,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:08:43,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:08:43,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 02:08:43,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:08:43,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:08:43,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:08:43,756 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 02:08:43,769 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:08:43,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:08:43,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:08:43,772 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:08:43,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:08:43,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:08:43,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:08:43,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:08:43,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:08:43,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:08:43,774 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:08:43,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:08:43,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:08:43,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:08:43,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:08:43,775 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:08:43,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:08:43,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:08:43,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:08:43,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:08:43,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:08:43,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:08:43,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:08:44,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:08:44,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:08:44,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:08:44,171 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:08:44,172 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:08:44,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-11-07 02:08:44,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d03bbc69e/d5e30880ced74f689640739d161a3cea/FLAG73a2526f2 [2020-11-07 02:08:44,957 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:08:44,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-11-07 02:08:44,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d03bbc69e/d5e30880ced74f689640739d161a3cea/FLAG73a2526f2 [2020-11-07 02:08:45,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d03bbc69e/d5e30880ced74f689640739d161a3cea [2020-11-07 02:08:45,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:08:45,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:08:45,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:08:45,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:08:45,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:08:45,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:45" (1/1) ... [2020-11-07 02:08:45,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc2d705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:45, skipping insertion in model container [2020-11-07 02:08:45,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:45" (1/1) ... [2020-11-07 02:08:45,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:08:45,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:08:45,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:08:45,559 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:08:45,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:08:45,596 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:08:45,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:45 WrapperNode [2020-11-07 02:08:45,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:08:45,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:08:45,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:08:45,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:08:45,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:45" (1/1) ... [2020-11-07 02:08:45,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:45" (1/1) ... [2020-11-07 02:08:45,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:45" (1/1) ... [2020-11-07 02:08:45,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:45" (1/1) ... [2020-11-07 02:08:45,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:45" (1/1) ... [2020-11-07 02:08:45,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:45" (1/1) ... [2020-11-07 02:08:45,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:45" (1/1) ... [2020-11-07 02:08:45,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:08:45,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:08:45,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:08:45,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:08:45,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:45" (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 02:08:45,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:08:45,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:08:45,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:08:45,721 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:08:45,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:08:45,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:08:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:08:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:08:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 02:08:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 02:08:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:08:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:08:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:08:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:08:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:08:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:08:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:08:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:08:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:08:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:08:45,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:08:45,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:08:46,073 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:08:46,074 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 02:08:46,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:46 BoogieIcfgContainer [2020-11-07 02:08:46,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:08:46,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:08:46,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:08:46,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:08:46,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:08:45" (1/3) ... [2020-11-07 02:08:46,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cd871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:46, skipping insertion in model container [2020-11-07 02:08:46,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:45" (2/3) ... [2020-11-07 02:08:46,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cd871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:46, skipping insertion in model container [2020-11-07 02:08:46,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:46" (3/3) ... [2020-11-07 02:08:46,087 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-11-07 02:08:46,107 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:08:46,112 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:08:46,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:08:46,155 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:08:46,156 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:08:46,156 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:08:46,156 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:08:46,156 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:08:46,156 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:08:46,157 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:08:46,157 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:08:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-11-07 02:08:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-07 02:08:46,189 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:46,192 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] [2020-11-07 02:08:46,193 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash -791041760, now seen corresponding path program 1 times [2020-11-07 02:08:46,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:46,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375187686] [2020-11-07 02:08:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:46,325 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:46,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:46,516 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 02:08:46,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375187686] [2020-11-07 02:08:46,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:46,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 02:08:46,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699758534] [2020-11-07 02:08:46,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 02:08:46,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:46,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 02:08:46,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:08:46,549 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-11-07 02:08:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:46,644 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-11-07 02:08:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 02:08:46,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-11-07 02:08:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:46,656 INFO L225 Difference]: With dead ends: 63 [2020-11-07 02:08:46,656 INFO L226 Difference]: Without dead ends: 31 [2020-11-07 02:08:46,660 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 02:08:46,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-07 02:08:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-07 02:08:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-07 02:08:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-11-07 02:08:46,715 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2020-11-07 02:08:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:46,716 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-11-07 02:08:46,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 02:08:46,716 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-11-07 02:08:46,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-07 02:08:46,718 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:46,718 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] [2020-11-07 02:08:46,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:08:46,719 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash 873611520, now seen corresponding path program 1 times [2020-11-07 02:08:46,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:46,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575415482] [2020-11-07 02:08:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:46,725 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:46,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:46,884 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 02:08:46,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575415482] [2020-11-07 02:08:46,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:46,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:08:46,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771101741] [2020-11-07 02:08:46,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:08:46,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:08:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:08:46,889 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-11-07 02:08:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:47,011 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-11-07 02:08:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:08:47,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-07 02:08:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:47,013 INFO L225 Difference]: With dead ends: 40 [2020-11-07 02:08:47,014 INFO L226 Difference]: Without dead ends: 33 [2020-11-07 02:08:47,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:08:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-07 02:08:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-11-07 02:08:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-07 02:08:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-11-07 02:08:47,029 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2020-11-07 02:08:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:47,029 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-11-07 02:08:47,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:08:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-11-07 02:08:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-07 02:08:47,034 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:47,034 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 02:08:47,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:08:47,034 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:47,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:47,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2108623913, now seen corresponding path program 1 times [2020-11-07 02:08:47,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:47,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559898684] [2020-11-07 02:08:47,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:49,278 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-11-07 02:08:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:49,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:49,441 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 02:08:49,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559898684] [2020-11-07 02:08:49,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:49,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:08:49,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950018618] [2020-11-07 02:08:49,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:08:49,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:49,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:08:49,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:08:49,489 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-11-07 02:08:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:49,695 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-11-07 02:08:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:08:49,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-11-07 02:08:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:49,697 INFO L225 Difference]: With dead ends: 49 [2020-11-07 02:08:49,697 INFO L226 Difference]: Without dead ends: 35 [2020-11-07 02:08:49,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:08:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-07 02:08:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-11-07 02:08:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-07 02:08:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-07 02:08:49,708 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-11-07 02:08:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:49,709 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-07 02:08:49,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:08:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-07 02:08:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-07 02:08:49,710 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:49,710 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] [2020-11-07 02:08:49,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:08:49,711 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1478675192, now seen corresponding path program 1 times [2020-11-07 02:08:49,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:49,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036486649] [2020-11-07 02:08:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:49,730 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:49,778 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:49,780 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:49,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:49,854 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 02:08:49,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036486649] [2020-11-07 02:08:49,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:49,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:08:49,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300828926] [2020-11-07 02:08:49,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:08:49,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:49,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:08:49,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:08:49,858 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2020-11-07 02:08:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:50,041 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-11-07 02:08:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:08:50,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-11-07 02:08:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:50,044 INFO L225 Difference]: With dead ends: 48 [2020-11-07 02:08:50,044 INFO L226 Difference]: Without dead ends: 41 [2020-11-07 02:08:50,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:08:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-07 02:08:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-11-07 02:08:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-07 02:08:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-07 02:08:50,056 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2020-11-07 02:08:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:50,057 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-07 02:08:50,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:08:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-07 02:08:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 02:08:50,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:50,059 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-11-07 02:08:50,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:08:50,059 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:50,060 INFO L82 PathProgramCache]: Analyzing trace with hash -681581345, now seen corresponding path program 2 times [2020-11-07 02:08:50,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:50,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816518040] [2020-11-07 02:08:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:50,203 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:50,205 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:50,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:50,296 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 02:08:50,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816518040] [2020-11-07 02:08:50,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:50,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:08:50,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303555819] [2020-11-07 02:08:50,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:08:50,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:50,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:08:50,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:08:50,299 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-11-07 02:08:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:50,560 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-11-07 02:08:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:08:50,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-11-07 02:08:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:50,562 INFO L225 Difference]: With dead ends: 61 [2020-11-07 02:08:50,562 INFO L226 Difference]: Without dead ends: 43 [2020-11-07 02:08:50,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:08:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-07 02:08:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-11-07 02:08:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-07 02:08:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-11-07 02:08:50,584 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 36 [2020-11-07 02:08:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:50,585 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-11-07 02:08:50,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:08:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-11-07 02:08:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 02:08:50,586 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:50,586 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2020-11-07 02:08:50,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:08:50,587 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:50,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2061175138, now seen corresponding path program 3 times [2020-11-07 02:08:50,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:50,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435997420] [2020-11-07 02:08:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:50,604 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:50,605 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:50,752 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:50,754 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:50,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:50,843 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 02:08:50,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435997420] [2020-11-07 02:08:50,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:50,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:08:50,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343558633] [2020-11-07 02:08:50,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:08:50,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:50,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:08:50,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:08:50,846 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 6 states. [2020-11-07 02:08:51,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:51,028 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-11-07 02:08:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:08:51,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-11-07 02:08:51,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:51,029 INFO L225 Difference]: With dead ends: 53 [2020-11-07 02:08:51,030 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 02:08:51,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:08:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 02:08:51,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 02:08:51,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 02:08:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 02:08:51,031 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-11-07 02:08:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:51,032 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 02:08:51,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:08:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 02:08:51,032 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 02:08:51,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:08:51,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 02:08:51,623 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 12) the Hoare annotation is: true [2020-11-07 02:08:51,623 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-11-07 02:08:51,623 INFO L269 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-11-07 02:08:51,623 INFO L269 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-11-07 02:08:51,623 INFO L269 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-11-07 02:08:51,624 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: true [2020-11-07 02:08:51,624 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 02:08:51,624 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 02:08:51,624 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2020-11-07 02:08:51,624 INFO L269 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-11-07 02:08:51,624 INFO L269 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-11-07 02:08:51,625 INFO L269 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-11-07 02:08:51,625 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-11-07 02:08:51,625 INFO L269 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-11-07 02:08:51,625 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 02:08:51,625 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 02:08:51,625 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 02:08:51,625 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 02:08:51,626 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 02:08:51,626 INFO L266 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-07 02:08:51,626 INFO L266 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-07 02:08:51,626 INFO L266 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-11-07 02:08:51,626 INFO L266 CegarLoopResult]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2020-11-07 02:08:51,626 INFO L266 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-11-07 02:08:51,626 INFO L262 CegarLoopResult]: At program point L35-2(lines 35 37) the Hoare annotation is: (= main_~k~0 4) [2020-11-07 02:08:51,627 INFO L262 CegarLoopResult]: At program point L35-3(lines 29 38) the Hoare annotation is: (or (= main_~k~0 4) (and (= main_~i~0 0) (<= (+ main_~j~0 100) 0))) [2020-11-07 02:08:51,627 INFO L262 CegarLoopResult]: At program point L31-2(lines 31 33) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2020-11-07 02:08:51,627 INFO L262 CegarLoopResult]: At program point L31-3(lines 31 33) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2020-11-07 02:08:51,627 INFO L262 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (= main_~i~0 0) [2020-11-07 02:08:51,627 INFO L262 CegarLoopResult]: At program point L29-2(lines 29 38) the Hoare annotation is: (= main_~k~0 4) [2020-11-07 02:08:51,627 INFO L269 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-11-07 02:08:51,628 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 24 41) the Hoare annotation is: true [2020-11-07 02:08:51,628 INFO L269 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: true [2020-11-07 02:08:51,628 INFO L269 CegarLoopResult]: At program point mainFINAL(lines 24 41) the Hoare annotation is: true [2020-11-07 02:08:51,628 INFO L262 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: false [2020-11-07 02:08:51,628 INFO L262 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2020-11-07 02:08:51,628 INFO L262 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (or (= main_~k~0 4) (and (= main_~i~0 0) (<= (+ main_~j~0 100) 0))) [2020-11-07 02:08:51,628 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 24 41) the Hoare annotation is: true [2020-11-07 02:08:51,629 INFO L262 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: (= main_~i~0 0) [2020-11-07 02:08:51,629 INFO L269 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-11-07 02:08:51,629 INFO L269 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-11-07 02:08:51,629 INFO L269 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-11-07 02:08:51,629 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-11-07 02:08:51,629 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2020-11-07 02:08:51,629 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 02:08:51,630 INFO L262 CegarLoopResult]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 02:08:51,630 INFO L262 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 02:08:51,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:08:51 BoogieIcfgContainer [2020-11-07 02:08:51,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 02:08:51,651 INFO L168 Benchmark]: Toolchain (without parser) took 6318.24 ms. Allocated memory was 161.5 MB in the beginning and 208.7 MB in the end (delta: 47.2 MB). Free memory was 138.3 MB in the beginning and 99.9 MB in the end (delta: 38.5 MB). Peak memory consumption was 86.3 MB. Max. memory is 8.0 GB. [2020-11-07 02:08:51,652 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 161.5 MB. Free memory was 135.8 MB in the beginning and 135.7 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:08:51,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.83 ms. Allocated memory is still 161.5 MB. Free memory was 137.7 MB in the beginning and 128.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 02:08:51,654 INFO L168 Benchmark]: Boogie Preprocessor took 38.92 ms. Allocated memory is still 161.5 MB. Free memory was 128.3 MB in the beginning and 126.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 02:08:51,655 INFO L168 Benchmark]: RCFGBuilder took 437.70 ms. Allocated memory is still 161.5 MB. Free memory was 126.7 MB in the beginning and 143.6 MB in the end (delta: -16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. [2020-11-07 02:08:51,656 INFO L168 Benchmark]: TraceAbstraction took 5570.49 ms. Allocated memory was 161.5 MB in the beginning and 208.7 MB in the end (delta: 47.2 MB). Free memory was 143.1 MB in the beginning and 99.9 MB in the end (delta: 43.2 MB). Peak memory consumption was 90.4 MB. Max. memory is 8.0 GB. [2020-11-07 02:08:51,660 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 161.5 MB. Free memory was 135.8 MB in the beginning and 135.7 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 257.83 ms. Allocated memory is still 161.5 MB. Free memory was 137.7 MB in the beginning and 128.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.92 ms. Allocated memory is still 161.5 MB. Free memory was 128.3 MB in the beginning and 126.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 437.70 ms. Allocated memory is still 161.5 MB. Free memory was 126.7 MB in the beginning and 143.6 MB in the end (delta: -16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5570.49 ms. Allocated memory was 161.5 MB in the beginning and 208.7 MB in the end (delta: 47.2 MB). Free memory was 143.1 MB in the beginning and 99.9 MB in the end (delta: 43.2 MB). Peak memory consumption was 90.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 35]: Loop Invariant Derived loop invariant: k == 4 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: k == 4 || i <= 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: k == 4 || (i == 0 && j + 100 <= 0) - ProcedureContractResult [Line: 12]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 190 SDtfs, 164 SDslu, 171 SDs, 0 SdLazy, 275 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 42 LocationsWithAnnotation, 108 PreInvPairs, 146 NumberOfFragments, 127 HoareAnnotationTreeSize, 108 FomulaSimplifications, 711 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 42 FomulaSimplificationsInter, 741 FormulaSimplificationTreeSizeReductionInter, 0.3s 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...