/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/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:26:38,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:26:38,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:26:38,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:26:38,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:26:38,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:26:38,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:26:38,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:26:38,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:26:38,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:26:38,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:26:38,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:26:38,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:26:38,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:26:38,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:26:38,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:26:38,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:26:38,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:26:38,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:26:38,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:26:38,239 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 20:26:38,262 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:26:38,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:26:38,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:26:38,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:26:38,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:26:38,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:26:38,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:26:38,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:26:38,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:26:38,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:26:38,271 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:26:38,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:26:38,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:26:38,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:26:38,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:26:38,272 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:26:38,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:26:38,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:26:38,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:26:38,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:26:38,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:26:38,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:26:38,273 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:26:38,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:26:38,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:26:38,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:26:38,702 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:26:38,703 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:26:38,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-10-23 20:26:38,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee0e98fc/761148b6112c47d1a82f08c0dc8280d9/FLAG6a01a60de [2020-10-23 20:26:39,382 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:26:39,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-10-23 20:26:39,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee0e98fc/761148b6112c47d1a82f08c0dc8280d9/FLAG6a01a60de [2020-10-23 20:26:39,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee0e98fc/761148b6112c47d1a82f08c0dc8280d9 [2020-10-23 20:26:39,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:26:39,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:26:39,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:39,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:26:39,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:26:39,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:39" (1/1) ... [2020-10-23 20:26:39,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229e11d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:39, skipping insertion in model container [2020-10-23 20:26:39,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:39" (1/1) ... [2020-10-23 20:26:39,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:26:39,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:26:40,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:40,063 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:26:40,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:40,104 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:26:40,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:40 WrapperNode [2020-10-23 20:26:40,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:40,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:26:40,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:26:40,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:26:40,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:40" (1/1) ... [2020-10-23 20:26:40,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:40" (1/1) ... [2020-10-23 20:26:40,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:40" (1/1) ... [2020-10-23 20:26:40,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:40" (1/1) ... [2020-10-23 20:26:40,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:40" (1/1) ... [2020-10-23 20:26:40,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:40" (1/1) ... [2020-10-23 20:26:40,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:40" (1/1) ... [2020-10-23 20:26:40,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:26:40,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:26:40,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:26:40,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:26:40,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:40" (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 20:26:40,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:26:40,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:26:40,257 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:26:40,257 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-23 20:26:40,257 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-23 20:26:40,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:26:40,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:26:40,258 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:26:40,258 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:26:40,258 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:26:40,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:26:40,259 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-23 20:26:40,259 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-23 20:26:40,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:26:40,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:26:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:26:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:26:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:26:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:26:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:26:40,618 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:26:40,619 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:26:40,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:40 BoogieIcfgContainer [2020-10-23 20:26:40,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:26:40,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:26:40,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:26:40,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:26:40,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:26:39" (1/3) ... [2020-10-23 20:26:40,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c165554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:40, skipping insertion in model container [2020-10-23 20:26:40,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:40" (2/3) ... [2020-10-23 20:26:40,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c165554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:40, skipping insertion in model container [2020-10-23 20:26:40,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:40" (3/3) ... [2020-10-23 20:26:40,642 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-10-23 20:26:40,652 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:26:40,656 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:26:40,671 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:26:40,697 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:26:40,697 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:26:40,697 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:26:40,697 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:26:40,698 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:26:40,698 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:26:40,698 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:26:40,698 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:26:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-23 20:26:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 20:26:40,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:40,728 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] [2020-10-23 20:26:40,729 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash 775886402, now seen corresponding path program 1 times [2020-10-23 20:26:40,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:40,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796667572] [2020-10-23 20:26:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:40,834 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,100 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 20:26:41,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796667572] [2020-10-23 20:26:41,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:41,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:41,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345353743] [2020-10-23 20:26:41,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:41,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:41,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:41,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:41,131 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 6 states. [2020-10-23 20:26:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:41,684 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-10-23 20:26:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:26:41,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-23 20:26:41,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:41,700 INFO L225 Difference]: With dead ends: 71 [2020-10-23 20:26:41,700 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 20:26:41,705 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 [2020-10-23 20:26:41,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 20:26:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-23 20:26:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 20:26:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-23 20:26:41,774 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 25 [2020-10-23 20:26:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:41,775 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-23 20:26:41,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-23 20:26:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 20:26:41,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:41,778 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] [2020-10-23 20:26:41,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:26:41,779 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:41,780 INFO L82 PathProgramCache]: Analyzing trace with hash 478831265, now seen corresponding path program 1 times [2020-10-23 20:26:41,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:41,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768228830] [2020-10-23 20:26:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:41,784 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,896 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 20:26:41,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768228830] [2020-10-23 20:26:41,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:41,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:41,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836202301] [2020-10-23 20:26:41,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:41,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:41,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:41,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:41,900 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 6 states. [2020-10-23 20:26:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:42,239 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-23 20:26:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:26:42,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-23 20:26:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:42,243 INFO L225 Difference]: With dead ends: 60 [2020-10-23 20:26:42,243 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 20:26:42,245 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 [2020-10-23 20:26:42,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 20:26:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-23 20:26:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 20:26:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-23 20:26:42,283 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 26 [2020-10-23 20:26:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:42,283 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-23 20:26:42,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-23 20:26:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 20:26:42,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:42,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:42,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:26:42,288 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash -708858972, now seen corresponding path program 1 times [2020-10-23 20:26:42,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:42,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317588315] [2020-10-23 20:26:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:42,299 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:42,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:42,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:42,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:26:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:42,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 20:26:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 20:26:42,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317588315] [2020-10-23 20:26:42,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:42,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:26:42,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979292747] [2020-10-23 20:26:42,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:26:42,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:42,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:26:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:26:42,474 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 8 states. [2020-10-23 20:26:42,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:42,865 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-10-23 20:26:42,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:26:42,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-23 20:26:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:42,867 INFO L225 Difference]: With dead ends: 92 [2020-10-23 20:26:42,868 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 20:26:42,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-23 20:26:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 20:26:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-23 20:26:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 20:26:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-23 20:26:42,887 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 42 [2020-10-23 20:26:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:42,888 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-23 20:26:42,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:26:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-23 20:26:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 20:26:42,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:42,891 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] [2020-10-23 20:26:42,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:26:42,891 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:42,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1629720462, now seen corresponding path program 1 times [2020-10-23 20:26:42,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:42,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911827509] [2020-10-23 20:26:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:42,896 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:42,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:43,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:43,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:26:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:43,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:26:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:26:43,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911827509] [2020-10-23 20:26:43,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:43,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:26:43,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626331744] [2020-10-23 20:26:43,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:26:43,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:43,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:26:43,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:26:43,150 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 10 states. [2020-10-23 20:26:43,802 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-23 20:26:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:44,072 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-10-23 20:26:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:26:44,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-23 20:26:44,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:44,075 INFO L225 Difference]: With dead ends: 76 [2020-10-23 20:26:44,076 INFO L226 Difference]: Without dead ends: 69 [2020-10-23 20:26:44,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:26:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-23 20:26:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-10-23 20:26:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 20:26:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-10-23 20:26:44,096 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 43 [2020-10-23 20:26:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:44,096 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-10-23 20:26:44,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:26:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-10-23 20:26:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 20:26:44,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:44,099 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:44,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:26:44,099 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:44,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2122193092, now seen corresponding path program 1 times [2020-10-23 20:26:44,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:44,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906489097] [2020-10-23 20:26:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:44,103 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:44,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:44,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:44,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:26:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:44,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:26:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:26:44,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906489097] [2020-10-23 20:26:44,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:44,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:26:44,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905873909] [2020-10-23 20:26:44,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:26:44,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:44,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:26:44,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:26:44,236 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 8 states. [2020-10-23 20:26:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:44,848 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2020-10-23 20:26:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:26:44,849 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-23 20:26:44,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:44,850 INFO L225 Difference]: With dead ends: 111 [2020-10-23 20:26:44,851 INFO L226 Difference]: Without dead ends: 63 [2020-10-23 20:26:44,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:26:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-23 20:26:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-23 20:26:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 20:26:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-10-23 20:26:44,870 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 44 [2020-10-23 20:26:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:44,871 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-10-23 20:26:44,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:26:44,871 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-10-23 20:26:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 20:26:44,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:44,874 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:44,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:26:44,874 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1688308117, now seen corresponding path program 1 times [2020-10-23 20:26:44,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:44,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348002310] [2020-10-23 20:26:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:44,943 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:266) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-23 20:26:44,949 INFO L168 Benchmark]: Toolchain (without parser) took 5195.27 ms. Allocated memory was 167.8 MB in the beginning and 201.3 MB in the end (delta: 33.6 MB). Free memory was 144.1 MB in the beginning and 156.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 22.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:44,950 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 125.8 MB. Free memory was 101.0 MB in the beginning and 100.9 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:26:44,951 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.81 ms. Allocated memory is still 167.8 MB. Free memory was 143.4 MB in the beginning and 134.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:44,952 INFO L168 Benchmark]: Boogie Preprocessor took 57.84 ms. Allocated memory is still 167.8 MB. Free memory was 134.1 MB in the beginning and 132.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:44,953 INFO L168 Benchmark]: RCFGBuilder took 460.32 ms. Allocated memory is still 167.8 MB. Free memory was 132.8 MB in the beginning and 150.1 MB in the end (delta: -17.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:44,954 INFO L168 Benchmark]: TraceAbstraction took 4313.35 ms. Allocated memory was 167.8 MB in the beginning and 201.3 MB in the end (delta: 33.6 MB). Free memory was 149.7 MB in the beginning and 156.2 MB in the end (delta: -6.5 MB). Peak memory consumption was 26.9 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:44,958 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 125.8 MB. Free memory was 101.0 MB in the beginning and 100.9 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 339.81 ms. Allocated memory is still 167.8 MB. Free memory was 143.4 MB in the beginning and 134.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.84 ms. Allocated memory is still 167.8 MB. Free memory was 134.1 MB in the beginning and 132.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 460.32 ms. Allocated memory is still 167.8 MB. Free memory was 132.8 MB in the beginning and 150.1 MB in the end (delta: -17.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4313.35 ms. Allocated memory was 167.8 MB in the beginning and 201.3 MB in the end (delta: 33.6 MB). Free memory was 149.7 MB in the beginning and 156.2 MB in the end (delta: -6.5 MB). Peak memory consumption was 26.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...