/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:58:26,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:58:26,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:58:26,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:58:26,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:58:26,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:58:26,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:58:26,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:58:26,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:58:26,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:58:26,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:58:26,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:58:26,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:58:26,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:58:26,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:58:26,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:58:26,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:58:26,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:58:26,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:58:26,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:58:26,249 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 21:58:26,290 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:58:26,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:58:26,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:58:26,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:58:26,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:58:26,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:58:26,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:58:26,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:58:26,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:58:26,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:58:26,304 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:58:26,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:58:26,305 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:58:26,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:58:26,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:58:26,306 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:58:26,306 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:58:26,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:58:26,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:58:26,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:58:26,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:58:26,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:58:26,317 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:58:26,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:58:27,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:58:27,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:58:27,008 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:58:27,009 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:58:27,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i.v+cfa-reducer.c [2020-10-23 21:58:27,169 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/429d5a994/986c87a278574d57b0c39e2f4bdec1d3/FLAGe148e415c [2020-10-23 21:58:28,209 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:58:28,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i.v+cfa-reducer.c [2020-10-23 21:58:28,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/429d5a994/986c87a278574d57b0c39e2f4bdec1d3/FLAGe148e415c [2020-10-23 21:58:28,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/429d5a994/986c87a278574d57b0c39e2f4bdec1d3 [2020-10-23 21:58:28,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:58:28,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:58:28,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:58:28,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:58:28,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:58:28,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:58:28" (1/1) ... [2020-10-23 21:58:28,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ad1f970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:58:28, skipping insertion in model container [2020-10-23 21:58:28,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:58:28" (1/1) ... [2020-10-23 21:58:28,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:58:28,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:58:28,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:58:28,748 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:58:28,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:58:28,878 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:58:28,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:58:28 WrapperNode [2020-10-23 21:58:28,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:58:28,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:58:28,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:58:28,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:58:28,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:58:28" (1/1) ... [2020-10-23 21:58:28,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:58:28" (1/1) ... [2020-10-23 21:58:28,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:58:28" (1/1) ... [2020-10-23 21:58:28,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:58:28" (1/1) ... [2020-10-23 21:58:28,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:58:28" (1/1) ... [2020-10-23 21:58:28,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:58:28" (1/1) ... [2020-10-23 21:58:28,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:58:28" (1/1) ... [2020-10-23 21:58:28,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:58:28,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:58:28,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:58:28,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:58:28,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:58:28" (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 21:58:29,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:58:29,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:58:29,095 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:58:29,096 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 21:58:29,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:58:29,096 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:58:29,096 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:58:29,096 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:58:29,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:58:29,097 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 21:58:29,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:58:29,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 21:58:29,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:58:29,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:58:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:58:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:58:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:58:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:58:29,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:58:30,211 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:58:30,212 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 21:58:30,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:58:30 BoogieIcfgContainer [2020-10-23 21:58:30,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:58:30,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:58:30,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:58:30,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:58:30,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:58:28" (1/3) ... [2020-10-23 21:58:30,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c8d514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:58:30, skipping insertion in model container [2020-10-23 21:58:30,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:58:28" (2/3) ... [2020-10-23 21:58:30,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c8d514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:58:30, skipping insertion in model container [2020-10-23 21:58:30,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:58:30" (3/3) ... [2020-10-23 21:58:30,253 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.i.v+cfa-reducer.c [2020-10-23 21:58:30,278 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:58:30,292 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:58:30,318 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:58:30,374 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:58:30,374 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:58:30,374 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:58:30,374 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:58:30,375 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:58:30,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:58:30,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:58:30,375 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:58:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states. [2020-10-23 21:58:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 21:58:30,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:30,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:58:30,443 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:30,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:30,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2097311355, now seen corresponding path program 1 times [2020-10-23 21:58:30,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:30,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380527322] [2020-10-23 21:58:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:30,681 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:31,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:31,339 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 21:58:31,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380527322] [2020-10-23 21:58:31,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:31,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 21:58:31,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882263474] [2020-10-23 21:58:31,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 21:58:31,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 21:58:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:58:31,406 INFO L87 Difference]: Start difference. First operand 218 states. Second operand 7 states. [2020-10-23 21:58:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:33,492 INFO L93 Difference]: Finished difference Result 280 states and 349 transitions. [2020-10-23 21:58:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 21:58:33,494 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-23 21:58:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:33,513 INFO L225 Difference]: With dead ends: 280 [2020-10-23 21:58:33,514 INFO L226 Difference]: Without dead ends: 226 [2020-10-23 21:58:33,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-23 21:58:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-23 21:58:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 180. [2020-10-23 21:58:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-23 21:58:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 199 transitions. [2020-10-23 21:58:33,663 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 199 transitions. Word has length 47 [2020-10-23 21:58:33,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:33,664 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 199 transitions. [2020-10-23 21:58:33,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 21:58:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 199 transitions. [2020-10-23 21:58:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 21:58:33,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:33,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:58:33,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:58:33,669 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:33,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2144220168, now seen corresponding path program 1 times [2020-10-23 21:58:33,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:33,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109609698] [2020-10-23 21:58:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:33,677 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:33,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:34,007 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 21:58:34,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109609698] [2020-10-23 21:58:34,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:34,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:58:34,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073890392] [2020-10-23 21:58:34,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:58:34,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:34,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:58:34,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:58:34,013 INFO L87 Difference]: Start difference. First operand 180 states and 199 transitions. Second operand 8 states. [2020-10-23 21:58:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:34,778 INFO L93 Difference]: Finished difference Result 182 states and 200 transitions. [2020-10-23 21:58:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 21:58:34,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-23 21:58:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:34,782 INFO L225 Difference]: With dead ends: 182 [2020-10-23 21:58:34,783 INFO L226 Difference]: Without dead ends: 179 [2020-10-23 21:58:34,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-23 21:58:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-23 21:58:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-10-23 21:58:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-23 21:58:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 197 transitions. [2020-10-23 21:58:34,886 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 197 transitions. Word has length 52 [2020-10-23 21:58:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:34,887 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 197 transitions. [2020-10-23 21:58:34,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:58:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 197 transitions. [2020-10-23 21:58:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-23 21:58:34,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:34,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:58:34,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:58:34,891 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:34,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash -99401472, now seen corresponding path program 1 times [2020-10-23 21:58:34,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:34,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370805758] [2020-10-23 21:58:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:34,899 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:35,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:35,121 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 21:58:35,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370805758] [2020-10-23 21:58:35,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:35,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 21:58:35,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049693719] [2020-10-23 21:58:35,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 21:58:35,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:35,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 21:58:35,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:58:35,134 INFO L87 Difference]: Start difference. First operand 179 states and 197 transitions. Second operand 7 states. [2020-10-23 21:58:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:36,329 INFO L93 Difference]: Finished difference Result 227 states and 252 transitions. [2020-10-23 21:58:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:58:36,332 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-23 21:58:36,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:36,335 INFO L225 Difference]: With dead ends: 227 [2020-10-23 21:58:36,336 INFO L226 Difference]: Without dead ends: 224 [2020-10-23 21:58:36,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-23 21:58:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-23 21:58:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 178. [2020-10-23 21:58:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-23 21:58:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 195 transitions. [2020-10-23 21:58:36,444 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 195 transitions. Word has length 62 [2020-10-23 21:58:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:36,448 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 195 transitions. [2020-10-23 21:58:36,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 21:58:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 195 transitions. [2020-10-23 21:58:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 21:58:36,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:36,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:36,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:58:36,457 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:36,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:36,458 INFO L82 PathProgramCache]: Analyzing trace with hash -636217690, now seen corresponding path program 1 times [2020-10-23 21:58:36,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:36,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697980741] [2020-10-23 21:58:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:36,469 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:36,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:36,690 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 21:58:36,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697980741] [2020-10-23 21:58:36,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:36,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 21:58:36,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643230573] [2020-10-23 21:58:36,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 21:58:36,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:36,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 21:58:36,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:58:36,695 INFO L87 Difference]: Start difference. First operand 178 states and 195 transitions. Second operand 7 states. [2020-10-23 21:58:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:37,383 INFO L93 Difference]: Finished difference Result 180 states and 196 transitions. [2020-10-23 21:58:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 21:58:37,385 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-23 21:58:37,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:37,388 INFO L225 Difference]: With dead ends: 180 [2020-10-23 21:58:37,389 INFO L226 Difference]: Without dead ends: 177 [2020-10-23 21:58:37,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-23 21:58:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-23 21:58:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-10-23 21:58:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-23 21:58:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 193 transitions. [2020-10-23 21:58:37,454 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 193 transitions. Word has length 67 [2020-10-23 21:58:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:37,455 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 193 transitions. [2020-10-23 21:58:37,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 21:58:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 193 transitions. [2020-10-23 21:58:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 21:58:37,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:37,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:37,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:58:37,458 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:37,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:37,459 INFO L82 PathProgramCache]: Analyzing trace with hash 256294954, now seen corresponding path program 1 times [2020-10-23 21:58:37,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:37,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299804640] [2020-10-23 21:58:37,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:37,464 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:37,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:37,777 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 21:58:37,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299804640] [2020-10-23 21:58:37,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:37,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:58:37,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838140052] [2020-10-23 21:58:37,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:58:37,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:37,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:58:37,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:58:37,782 INFO L87 Difference]: Start difference. First operand 177 states and 193 transitions. Second operand 8 states. [2020-10-23 21:58:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:39,927 INFO L93 Difference]: Finished difference Result 315 states and 351 transitions. [2020-10-23 21:58:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 21:58:39,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-23 21:58:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:39,936 INFO L225 Difference]: With dead ends: 315 [2020-10-23 21:58:39,937 INFO L226 Difference]: Without dead ends: 312 [2020-10-23 21:58:39,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-23 21:58:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-23 21:58:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 188. [2020-10-23 21:58:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-23 21:58:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 206 transitions. [2020-10-23 21:58:40,034 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 206 transitions. Word has length 73 [2020-10-23 21:58:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:40,037 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 206 transitions. [2020-10-23 21:58:40,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:58:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 206 transitions. [2020-10-23 21:58:40,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-23 21:58:40,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:40,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:40,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 21:58:40,052 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:40,052 INFO L82 PathProgramCache]: Analyzing trace with hash 226428244, now seen corresponding path program 1 times [2020-10-23 21:58:40,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:40,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624996024] [2020-10-23 21:58:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:40,059 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:40,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:40,348 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 21:58:40,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624996024] [2020-10-23 21:58:40,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:40,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:58:40,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180690358] [2020-10-23 21:58:40,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:58:40,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:40,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:58:40,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:58:40,353 INFO L87 Difference]: Start difference. First operand 188 states and 206 transitions. Second operand 8 states. [2020-10-23 21:58:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:41,503 INFO L93 Difference]: Finished difference Result 190 states and 207 transitions. [2020-10-23 21:58:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 21:58:41,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-23 21:58:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:41,507 INFO L225 Difference]: With dead ends: 190 [2020-10-23 21:58:41,507 INFO L226 Difference]: Without dead ends: 187 [2020-10-23 21:58:41,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-23 21:58:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-23 21:58:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-23 21:58:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-23 21:58:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 204 transitions. [2020-10-23 21:58:41,607 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 204 transitions. Word has length 78 [2020-10-23 21:58:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:41,607 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 204 transitions. [2020-10-23 21:58:41,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:58:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 204 transitions. [2020-10-23 21:58:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-23 21:58:41,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:41,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:41,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 21:58:41,613 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1715941524, now seen corresponding path program 1 times [2020-10-23 21:58:41,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:41,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408926418] [2020-10-23 21:58:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:41,621 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:41,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:58:41,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408926418] [2020-10-23 21:58:41,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:41,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:58:41,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089713251] [2020-10-23 21:58:41,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:58:41,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:58:41,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:58:41,862 INFO L87 Difference]: Start difference. First operand 187 states and 204 transitions. Second operand 8 states. [2020-10-23 21:58:42,675 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-23 21:58:42,812 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-23 21:58:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:44,714 INFO L93 Difference]: Finished difference Result 433 states and 480 transitions. [2020-10-23 21:58:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 21:58:44,716 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-23 21:58:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:44,722 INFO L225 Difference]: With dead ends: 433 [2020-10-23 21:58:44,723 INFO L226 Difference]: Without dead ends: 430 [2020-10-23 21:58:44,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-23 21:58:44,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-23 21:58:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 192. [2020-10-23 21:58:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-23 21:58:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 209 transitions. [2020-10-23 21:58:44,813 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 209 transitions. Word has length 78 [2020-10-23 21:58:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:44,814 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 209 transitions. [2020-10-23 21:58:44,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:58:44,814 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 209 transitions. [2020-10-23 21:58:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-23 21:58:44,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:44,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:44,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 21:58:44,823 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:44,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2011231013, now seen corresponding path program 1 times [2020-10-23 21:58:44,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:44,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044017086] [2020-10-23 21:58:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:44,833 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:45,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:45,060 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 21:58:45,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044017086] [2020-10-23 21:58:45,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:45,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:58:45,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189095109] [2020-10-23 21:58:45,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:58:45,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:45,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:58:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:58:45,066 INFO L87 Difference]: Start difference. First operand 192 states and 209 transitions. Second operand 8 states. [2020-10-23 21:58:46,030 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-23 21:58:46,277 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-23 21:58:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:46,730 INFO L93 Difference]: Finished difference Result 286 states and 313 transitions. [2020-10-23 21:58:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:58:46,731 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-23 21:58:46,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:46,735 INFO L225 Difference]: With dead ends: 286 [2020-10-23 21:58:46,736 INFO L226 Difference]: Without dead ends: 283 [2020-10-23 21:58:46,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-10-23 21:58:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-23 21:58:46,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 191. [2020-10-23 21:58:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-23 21:58:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 207 transitions. [2020-10-23 21:58:46,857 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 207 transitions. Word has length 83 [2020-10-23 21:58:46,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:46,858 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 207 transitions. [2020-10-23 21:58:46,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:58:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 207 transitions. [2020-10-23 21:58:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-23 21:58:46,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:46,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:46,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 21:58:46,868 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:46,869 INFO L82 PathProgramCache]: Analyzing trace with hash -348210566, now seen corresponding path program 1 times [2020-10-23 21:58:46,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:46,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294362186] [2020-10-23 21:58:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:46,875 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:46,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:47,000 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 21:58:47,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294362186] [2020-10-23 21:58:47,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:47,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 21:58:47,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748461458] [2020-10-23 21:58:47,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 21:58:47,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:47,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 21:58:47,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 21:58:47,017 INFO L87 Difference]: Start difference. First operand 191 states and 207 transitions. Second operand 4 states. [2020-10-23 21:58:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:47,706 INFO L93 Difference]: Finished difference Result 282 states and 308 transitions. [2020-10-23 21:58:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 21:58:47,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-23 21:58:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:47,710 INFO L225 Difference]: With dead ends: 282 [2020-10-23 21:58:47,711 INFO L226 Difference]: Without dead ends: 191 [2020-10-23 21:58:47,717 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 [2020-10-23 21:58:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-23 21:58:47,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-10-23 21:58:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-23 21:58:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 205 transitions. [2020-10-23 21:58:47,848 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 205 transitions. Word has length 84 [2020-10-23 21:58:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:47,848 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 205 transitions. [2020-10-23 21:58:47,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 21:58:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 205 transitions. [2020-10-23 21:58:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-23 21:58:47,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:47,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:58:47,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 21:58:47,851 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:47,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:47,853 INFO L82 PathProgramCache]: Analyzing trace with hash -782874089, now seen corresponding path program 1 times [2020-10-23 21:58:47,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:47,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850639389] [2020-10-23 21:58:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:47,862 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:48,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:48,094 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 21:58:48,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850639389] [2020-10-23 21:58:48,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:48,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:58:48,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087924546] [2020-10-23 21:58:48,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:58:48,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:48,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:58:48,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:58:48,098 INFO L87 Difference]: Start difference. First operand 191 states and 205 transitions. Second operand 8 states. [2020-10-23 21:58:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:49,083 INFO L93 Difference]: Finished difference Result 193 states and 206 transitions. [2020-10-23 21:58:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:58:49,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-10-23 21:58:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:49,087 INFO L225 Difference]: With dead ends: 193 [2020-10-23 21:58:49,088 INFO L226 Difference]: Without dead ends: 190 [2020-10-23 21:58:49,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-10-23 21:58:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-23 21:58:49,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-10-23 21:58:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-23 21:58:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 203 transitions. [2020-10-23 21:58:49,191 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 203 transitions. Word has length 89 [2020-10-23 21:58:49,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:49,192 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 203 transitions. [2020-10-23 21:58:49,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:58:49,192 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 203 transitions. [2020-10-23 21:58:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-23 21:58:49,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:49,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:58:49,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 21:58:49,196 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:49,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1988822630, now seen corresponding path program 1 times [2020-10-23 21:58:49,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:49,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332516119] [2020-10-23 21:58:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:49,208 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:49,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:49,395 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 21:58:49,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332516119] [2020-10-23 21:58:49,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:49,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 21:58:49,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018291361] [2020-10-23 21:58:49,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 21:58:49,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:49,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 21:58:49,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:58:49,401 INFO L87 Difference]: Start difference. First operand 190 states and 203 transitions. Second operand 7 states. [2020-10-23 21:58:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:50,128 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2020-10-23 21:58:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 21:58:50,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-23 21:58:50,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:50,132 INFO L225 Difference]: With dead ends: 192 [2020-10-23 21:58:50,132 INFO L226 Difference]: Without dead ends: 189 [2020-10-23 21:58:50,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-23 21:58:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-23 21:58:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-10-23 21:58:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-23 21:58:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 201 transitions. [2020-10-23 21:58:50,217 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 201 transitions. Word has length 94 [2020-10-23 21:58:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:50,218 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 201 transitions. [2020-10-23 21:58:50,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 21:58:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 201 transitions. [2020-10-23 21:58:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-23 21:58:50,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:50,220 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:58:50,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 21:58:50,221 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:50,222 INFO L82 PathProgramCache]: Analyzing trace with hash -481418103, now seen corresponding path program 1 times [2020-10-23 21:58:50,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:50,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888933189] [2020-10-23 21:58:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:50,768 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-23 21:58:51,270 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-10-23 21:58:51,437 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-23 21:58:51,763 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2020-10-23 21:58:51,908 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-10-23 21:58:52,234 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-23 21:58:53,326 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2020-10-23 21:58:53,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:58:53,384 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:58:55,705 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2020-10-23 21:58:55,860 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-23 21:58:55,865 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:58:56,054 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-23 21:58:57,033 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-10-23 21:58:57,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:58:57,069 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:58:57,274 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-23 21:58:59,638 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-10-23 21:58:59,819 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-23 21:59:00,017 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-23 21:59:00,047 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:59:00,867 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2020-10-23 21:59:00,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:59:00,885 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:59:02,187 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-23 21:59:02,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:59:04,460 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-23 21:59:06,741 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2020-10-23 21:59:06,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:59:07,442 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2020-10-23 21:59:07,467 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:59:07,638 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-23 21:59:08,539 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 118 [2020-10-23 21:59:08,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:59:08,569 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:59:08,735 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-23 21:59:11,030 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-10-23 21:59:11,206 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-23 21:59:11,358 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-23 21:59:11,361 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:59:13,662 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2020-10-23 21:59:13,817 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-23 21:59:13,819 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:59:14,567 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-23 21:59:14,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:59:14,732 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-23 21:59:14,735 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:59:15,521 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2020-10-23 21:59:15,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 21:59:15,654 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-23 21:59:15,656 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:59:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:59:15,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:59:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:59:15,722 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:59:15,766 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 21:59:15,766 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:59:15,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 21:59:15,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:59:15 BoogieIcfgContainer [2020-10-23 21:59:15,796 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:59:15,798 INFO L168 Benchmark]: Toolchain (without parser) took 47530.56 ms. Allocated memory was 151.0 MB in the beginning and 389.0 MB in the end (delta: 238.0 MB). Free memory was 127.2 MB in the beginning and 286.6 MB in the end (delta: -159.4 MB). Peak memory consumption was 80.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:59:15,799 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:59:15,800 INFO L168 Benchmark]: CACSL2BoogieTranslator took 603.50 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 114.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:59:15,800 INFO L168 Benchmark]: Boogie Preprocessor took 67.37 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 112.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:59:15,801 INFO L168 Benchmark]: RCFGBuilder took 1270.20 ms. Allocated memory is still 151.0 MB. Free memory was 112.6 MB in the beginning and 105.4 MB in the end (delta: 7.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. [2020-10-23 21:59:15,802 INFO L168 Benchmark]: TraceAbstraction took 45566.63 ms. Allocated memory was 151.0 MB in the beginning and 389.0 MB in the end (delta: 238.0 MB). Free memory was 104.9 MB in the beginning and 286.6 MB in the end (delta: -181.8 MB). Peak memory consumption was 55.7 MB. Max. memory is 8.0 GB. [2020-10-23 21:59:15,805 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 603.50 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 114.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.37 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 112.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1270.20 ms. Allocated memory is still 151.0 MB. Free memory was 112.6 MB in the beginning and 105.4 MB in the end (delta: 7.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 45566.63 ms. Allocated memory was 151.0 MB in the beginning and 389.0 MB in the end (delta: 238.0 MB). Free memory was 104.9 MB in the beginning and 286.6 MB in the end (delta: -181.8 MB). Peak memory consumption was 55.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1] int __return_main; [L12] int __return_375; [L15] int main__scheme; [L16] int main__urilen; [L17] int main__tokenlen; [L18] int main__cp; [L19] int main__c; [L20] main__urilen = __VERIFIER_nondet_int() [L21] main__tokenlen = __VERIFIER_nondet_int() [L22] main__scheme = __VERIFIER_nondet_int() [L23] COND FALSE !(!(main__urilen <= 1000000)) [L29] COND FALSE !(!(main__urilen >= -1000000)) [L35] COND FALSE !(!(main__tokenlen <= 1000000)) [L41] COND FALSE !(!(main__tokenlen >= -1000000)) [L47] COND FALSE !(!(main__scheme <= 1000000)) [L53] COND FALSE !(!(main__scheme >= -1000000)) [L59] COND TRUE main__urilen > 0 [L61] COND TRUE main__tokenlen > 0 [L63] COND TRUE main__scheme >= 0 [L65] COND FALSE !(main__scheme == 0) [L71] COND FALSE !((main__urilen - 1) < main__scheme) [L77] main__cp = main__scheme [L79] int __tmp_1; [L80] __tmp_1 = (main__cp - 1) < main__urilen [L81] int __VERIFIER_assert__cond; [L82] __VERIFIER_assert__cond = __tmp_1 [L83] COND FALSE !(__VERIFIER_assert__cond == 0) [L91] int __tmp_2; [L92] __tmp_2 = 0 <= (main__cp - 1) [L93] int __VERIFIER_assert__cond; [L94] __VERIFIER_assert__cond = __tmp_2 [L95] COND FALSE !(__VERIFIER_assert__cond == 0) [L102] int main____CPAchecker_TMP_0; [L103] main____CPAchecker_TMP_0 = __VERIFIER_nondet_int() [L104] COND TRUE !(main____CPAchecker_TMP_0 == 0) [L107] int __tmp_3; [L108] __tmp_3 = main__cp < main__urilen [L109] int __VERIFIER_assert__cond; [L110] __VERIFIER_assert__cond = __tmp_3 [L111] COND FALSE !(__VERIFIER_assert__cond == 0) [L119] int __tmp_4; [L120] __tmp_4 = 0 <= main__cp [L121] int __VERIFIER_assert__cond; [L122] __VERIFIER_assert__cond = __tmp_4 [L123] COND FALSE !(__VERIFIER_assert__cond == 0) [L131] COND TRUE main__cp != (main__urilen - 1) [L133] int main____CPAchecker_TMP_1; [L134] main____CPAchecker_TMP_1 = __VERIFIER_nondet_int() [L135] COND FALSE !(!(main____CPAchecker_TMP_1 == 0)) [L368] int __tmp_17; [L369] __tmp_17 = main__cp < main__urilen [L370] int __VERIFIER_assert__cond; [L371] __VERIFIER_assert__cond = __tmp_17 [L372] COND FALSE !(__VERIFIER_assert__cond == 0) [L380] int __tmp_18; [L381] __tmp_18 = 0 <= main__cp [L382] int __VERIFIER_assert__cond; [L383] __VERIFIER_assert__cond = __tmp_18 [L384] COND FALSE !(__VERIFIER_assert__cond == 0) [L391] main__cp = main__cp + 1 [L131] COND TRUE main__cp != (main__urilen - 1) [L133] int main____CPAchecker_TMP_1; [L134] main____CPAchecker_TMP_1 = __VERIFIER_nondet_int() [L135] COND FALSE !(!(main____CPAchecker_TMP_1 == 0)) [L368] int __tmp_17; [L369] __tmp_17 = main__cp < main__urilen [L370] int __VERIFIER_assert__cond; [L371] __VERIFIER_assert__cond = __tmp_17 [L372] COND TRUE __VERIFIER_assert__cond == 0 [L374] CALL reach_error() [L4] __assert_fail("0", "apache-escape-absolute.i.v+cfa-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 223 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 45.3s, OverallIterations: 12, TraceHistogramMax: 2, AutomataDifference: 15.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2089 SDtfs, 7272 SDslu, 1387 SDs, 0 SdLazy, 4587 SolverSat, 353 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=218occurred 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: 1.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 546 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...