/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:29:11,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:29:11,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:29:11,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:29:11,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:29:11,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:29:11,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:29:11,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:29:11,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:29:11,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:29:11,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:29:11,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:29:11,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:29:11,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:29:11,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:29:11,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:29:11,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:29:11,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:29:11,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:29:11,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:29:11,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:29:11,187 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:29:11,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:29:11,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:29:11,191 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:29:11,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:29:11,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:29:11,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:29:11,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:29:11,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:29:11,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:29:11,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:29:11,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:29:11,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:29:11,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:29:11,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:29:11,195 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:29:11,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:29:11,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:29:11,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:29:11,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:29:11,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:29:11,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:29:11,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:29:11,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:29:11,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:29:11,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:29:11,615 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:29:11,616 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:29:11,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-10-24 02:29:11,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/963674bd7/7fa0be5034d344f09a64743d425ef512/FLAG74a919d2e [2020-10-24 02:29:12,345 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:29:12,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-10-24 02:29:12,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/963674bd7/7fa0be5034d344f09a64743d425ef512/FLAG74a919d2e [2020-10-24 02:29:12,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/963674bd7/7fa0be5034d344f09a64743d425ef512 [2020-10-24 02:29:12,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:29:12,380 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:29:12,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:29:12,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:29:12,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:29:12,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:12" (1/1) ... [2020-10-24 02:29:12,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@529aa220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:12, skipping insertion in model container [2020-10-24 02:29:12,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:12" (1/1) ... [2020-10-24 02:29:12,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:29:12,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:29:12,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:29:12,718 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:29:12,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:29:12,764 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:29:12,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:12 WrapperNode [2020-10-24 02:29:12,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:29:12,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:29:12,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:29:12,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:29:12,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:12" (1/1) ... [2020-10-24 02:29:12,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:12" (1/1) ... [2020-10-24 02:29:12,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:12" (1/1) ... [2020-10-24 02:29:12,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:12" (1/1) ... [2020-10-24 02:29:12,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:12" (1/1) ... [2020-10-24 02:29:12,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:12" (1/1) ... [2020-10-24 02:29:12,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:12" (1/1) ... [2020-10-24 02:29:12,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:29:12,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:29:12,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:29:12,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:29:12,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:12" (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 [2020-10-24 02:29:12,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:29:12,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:29:12,923 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:29:12,923 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:29:12,924 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:29:12,924 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:29:12,924 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:29:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:29:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:29:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:29:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:29:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:29:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:29:12,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:29:12,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:29:12,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:29:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:29:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:29:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:29:12,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:29:12,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:29:12,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:29:13,245 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:29:13,245 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:29:13,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:13 BoogieIcfgContainer [2020-10-24 02:29:13,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:29:13,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:29:13,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:29:13,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:29:13,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:29:12" (1/3) ... [2020-10-24 02:29:13,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b9fc20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:13, skipping insertion in model container [2020-10-24 02:29:13,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:12" (2/3) ... [2020-10-24 02:29:13,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b9fc20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:13, skipping insertion in model container [2020-10-24 02:29:13,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:13" (3/3) ... [2020-10-24 02:29:13,256 INFO L111 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-10-24 02:29:13,269 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:29:13,274 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:29:13,289 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:29:13,368 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:29:13,368 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:29:13,369 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:29:13,369 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:29:13,369 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:29:13,369 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:29:13,369 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:29:13,369 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:29:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-24 02:29:13,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-24 02:29:13,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:13,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:13,400 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:13,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1985075637, now seen corresponding path program 1 times [2020-10-24 02:29:13,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:13,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602768681] [2020-10-24 02:29:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:14,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:14,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602768681] [2020-10-24 02:29:14,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:14,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-24 02:29:14,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559268285] [2020-10-24 02:29:14,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:29:14,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:14,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:29:14,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:29:14,082 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 10 states. [2020-10-24 02:29:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:14,911 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-24 02:29:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:29:14,913 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-24 02:29:14,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:14,922 INFO L225 Difference]: With dead ends: 85 [2020-10-24 02:29:14,923 INFO L226 Difference]: Without dead ends: 49 [2020-10-24 02:29:14,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:29:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-24 02:29:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-10-24 02:29:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-24 02:29:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-24 02:29:14,989 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 29 [2020-10-24 02:29:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:14,990 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-24 02:29:14,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:29:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-24 02:29:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 02:29:14,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:14,992 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] [2020-10-24 02:29:14,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:29:14,993 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:14,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1454609912, now seen corresponding path program 1 times [2020-10-24 02:29:14,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:14,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607023661] [2020-10-24 02:29:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:15,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:15,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607023661] [2020-10-24 02:29:15,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:15,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-24 02:29:15,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203652] [2020-10-24 02:29:15,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-24 02:29:15,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-24 02:29:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:29:15,397 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 13 states. [2020-10-24 02:29:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:16,171 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-24 02:29:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 02:29:16,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-24 02:29:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:16,173 INFO L225 Difference]: With dead ends: 64 [2020-10-24 02:29:16,174 INFO L226 Difference]: Without dead ends: 57 [2020-10-24 02:29:16,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:29:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-24 02:29:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2020-10-24 02:29:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-24 02:29:16,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-24 02:29:16,190 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 36 [2020-10-24 02:29:16,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:16,190 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-24 02:29:16,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-24 02:29:16,191 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-24 02:29:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 02:29:16,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:16,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:16,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:29:16,193 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:16,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1661043528, now seen corresponding path program 1 times [2020-10-24 02:29:16,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:16,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057168993] [2020-10-24 02:29:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:16,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:16,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057168993] [2020-10-24 02:29:16,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:16,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-24 02:29:16,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575474806] [2020-10-24 02:29:16,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-24 02:29:16,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:16,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-24 02:29:16,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:29:16,486 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 13 states. [2020-10-24 02:29:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:17,263 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-10-24 02:29:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 02:29:17,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-24 02:29:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:17,268 INFO L225 Difference]: With dead ends: 65 [2020-10-24 02:29:17,268 INFO L226 Difference]: Without dead ends: 58 [2020-10-24 02:29:17,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:29:17,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-24 02:29:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-10-24 02:29:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-24 02:29:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-24 02:29:17,298 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 36 [2020-10-24 02:29:17,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:17,298 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-24 02:29:17,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-24 02:29:17,299 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-24 02:29:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-24 02:29:17,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:17,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:17,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:29:17,301 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:17,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:17,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1615947349, now seen corresponding path program 2 times [2020-10-24 02:29:17,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:17,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875788741] [2020-10-24 02:29:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:17,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:17,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875788741] [2020-10-24 02:29:17,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:17,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:29:17,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95343484] [2020-10-24 02:29:17,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:29:17,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:17,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:29:17,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:29:17,720 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 16 states. [2020-10-24 02:29:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:18,977 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-10-24 02:29:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:29:18,978 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-24 02:29:18,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:18,980 INFO L225 Difference]: With dead ends: 75 [2020-10-24 02:29:18,980 INFO L226 Difference]: Without dead ends: 68 [2020-10-24 02:29:18,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:29:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-24 02:29:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-24 02:29:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-24 02:29:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-24 02:29:19,000 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 43 [2020-10-24 02:29:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:19,001 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-24 02:29:19,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:29:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-24 02:29:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-24 02:29:19,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:19,002 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 02:29:19,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:29:19,003 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:19,004 INFO L82 PathProgramCache]: Analyzing trace with hash -436633493, now seen corresponding path program 1 times [2020-10-24 02:29:19,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:19,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576638153] [2020-10-24 02:29:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:19,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:19,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576638153] [2020-10-24 02:29:19,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:19,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:29:19,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981463793] [2020-10-24 02:29:19,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:29:19,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:19,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:29:19,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:29:19,360 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 16 states. [2020-10-24 02:29:20,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:20,483 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-10-24 02:29:20,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 02:29:20,484 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-24 02:29:20,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:20,487 INFO L225 Difference]: With dead ends: 77 [2020-10-24 02:29:20,488 INFO L226 Difference]: Without dead ends: 70 [2020-10-24 02:29:20,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 02:29:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-24 02:29:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2020-10-24 02:29:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-24 02:29:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-24 02:29:20,517 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 43 [2020-10-24 02:29:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:20,517 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-24 02:29:20,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:29:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-24 02:29:20,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-24 02:29:20,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:20,524 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 02:29:20,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:29:20,526 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:20,527 INFO L82 PathProgramCache]: Analyzing trace with hash -917071125, now seen corresponding path program 2 times [2020-10-24 02:29:20,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:20,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221563312] [2020-10-24 02:29:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:20,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:20,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221563312] [2020-10-24 02:29:20,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:20,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:29:20,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110598512] [2020-10-24 02:29:20,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:29:20,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:20,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:29:20,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:29:20,855 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 16 states. [2020-10-24 02:29:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:21,994 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-24 02:29:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 02:29:21,995 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-24 02:29:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:21,996 INFO L225 Difference]: With dead ends: 85 [2020-10-24 02:29:21,996 INFO L226 Difference]: Without dead ends: 78 [2020-10-24 02:29:21,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 02:29:21,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-24 02:29:22,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2020-10-24 02:29:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-24 02:29:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-24 02:29:22,016 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 43 [2020-10-24 02:29:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:22,016 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-24 02:29:22,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:29:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-24 02:29:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-24 02:29:22,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:22,018 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:22,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:29:22,018 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:22,019 INFO L82 PathProgramCache]: Analyzing trace with hash 262242731, now seen corresponding path program 2 times [2020-10-24 02:29:22,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:22,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880611701] [2020-10-24 02:29:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:22,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:22,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880611701] [2020-10-24 02:29:22,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:22,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:29:22,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401950978] [2020-10-24 02:29:22,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:29:22,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:29:22,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:29:22,374 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 16 states. [2020-10-24 02:29:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:23,483 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-24 02:29:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:29:23,484 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-24 02:29:23,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:23,485 INFO L225 Difference]: With dead ends: 85 [2020-10-24 02:29:23,486 INFO L226 Difference]: Without dead ends: 78 [2020-10-24 02:29:23,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:29:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-24 02:29:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2020-10-24 02:29:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-24 02:29:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-24 02:29:23,506 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 43 [2020-10-24 02:29:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:23,506 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-24 02:29:23,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:29:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-24 02:29:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 02:29:23,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:23,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:23,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:29:23,508 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:23,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:23,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1672702312, now seen corresponding path program 3 times [2020-10-24 02:29:23,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:23,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98845243] [2020-10-24 02:29:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:23,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:29:23,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98845243] [2020-10-24 02:29:23,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:23,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:29:23,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064751071] [2020-10-24 02:29:23,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:29:23,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:23,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:29:23,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:29:23,886 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 18 states. [2020-10-24 02:29:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:25,009 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-10-24 02:29:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:29:25,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-24 02:29:25,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:25,011 INFO L225 Difference]: With dead ends: 89 [2020-10-24 02:29:25,011 INFO L226 Difference]: Without dead ends: 82 [2020-10-24 02:29:25,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:29:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-24 02:29:25,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-10-24 02:29:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-24 02:29:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-24 02:29:25,039 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 50 [2020-10-24 02:29:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:25,042 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-24 02:29:25,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:29:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-24 02:29:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 02:29:25,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:25,043 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-24 02:29:25,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:29:25,045 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:25,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:25,046 INFO L82 PathProgramCache]: Analyzing trace with hash -493388456, now seen corresponding path program 3 times [2020-10-24 02:29:25,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:25,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865952760] [2020-10-24 02:29:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:25,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:29:25,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865952760] [2020-10-24 02:29:25,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:25,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:29:25,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144491144] [2020-10-24 02:29:25,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:29:25,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:29:25,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:29:25,437 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 18 states. [2020-10-24 02:29:26,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:26,758 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-24 02:29:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 02:29:26,758 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-24 02:29:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:26,759 INFO L225 Difference]: With dead ends: 94 [2020-10-24 02:29:26,759 INFO L226 Difference]: Without dead ends: 87 [2020-10-24 02:29:26,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:29:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-24 02:29:26,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2020-10-24 02:29:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-24 02:29:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-24 02:29:26,780 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 50 [2020-10-24 02:29:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:26,781 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-24 02:29:26,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:29:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-24 02:29:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 02:29:26,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:26,788 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-24 02:29:26,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:29:26,789 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:26,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:26,789 INFO L82 PathProgramCache]: Analyzing trace with hash -973826088, now seen corresponding path program 4 times [2020-10-24 02:29:26,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:26,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24935877] [2020-10-24 02:29:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:27,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:29:27,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24935877] [2020-10-24 02:29:27,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:27,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:29:27,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567287651] [2020-10-24 02:29:27,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:29:27,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:29:27,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:29:27,210 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 18 states. [2020-10-24 02:29:28,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:28,697 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-10-24 02:29:28,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 02:29:28,698 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-24 02:29:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:28,700 INFO L225 Difference]: With dead ends: 115 [2020-10-24 02:29:28,700 INFO L226 Difference]: Without dead ends: 107 [2020-10-24 02:29:28,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:29:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-24 02:29:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2020-10-24 02:29:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-24 02:29:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-24 02:29:28,731 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 50 [2020-10-24 02:29:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:28,731 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-24 02:29:28,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:29:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-24 02:29:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 02:29:28,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:28,732 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-24 02:29:28,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:29:28,733 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:28,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:28,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1625510568, now seen corresponding path program 5 times [2020-10-24 02:29:28,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:28,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309444487] [2020-10-24 02:29:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:29,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:29:29,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309444487] [2020-10-24 02:29:29,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:29,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:29:29,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138133141] [2020-10-24 02:29:29,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:29:29,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:29,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:29:29,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:29:29,148 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 18 states. [2020-10-24 02:29:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:30,317 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2020-10-24 02:29:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:29:30,318 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-24 02:29:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:30,319 INFO L225 Difference]: With dead ends: 103 [2020-10-24 02:29:30,320 INFO L226 Difference]: Without dead ends: 96 [2020-10-24 02:29:30,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:29:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-24 02:29:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2020-10-24 02:29:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-24 02:29:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-10-24 02:29:30,345 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 50 [2020-10-24 02:29:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:30,346 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-10-24 02:29:30,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:29:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-10-24 02:29:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 02:29:30,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:30,347 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-24 02:29:30,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:29:30,347 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:30,348 INFO L82 PathProgramCache]: Analyzing trace with hash -446196712, now seen corresponding path program 6 times [2020-10-24 02:29:30,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:30,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951917954] [2020-10-24 02:29:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:30,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:29:30,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951917954] [2020-10-24 02:29:30,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:30,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:29:30,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741863515] [2020-10-24 02:29:30,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:29:30,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:30,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:29:30,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:29:30,722 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 18 states. [2020-10-24 02:29:32,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:32,035 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2020-10-24 02:29:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 02:29:32,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-24 02:29:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:32,037 INFO L225 Difference]: With dead ends: 116 [2020-10-24 02:29:32,037 INFO L226 Difference]: Without dead ends: 109 [2020-10-24 02:29:32,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:29:32,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-24 02:29:32,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2020-10-24 02:29:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-24 02:29:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2020-10-24 02:29:32,060 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 50 [2020-10-24 02:29:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:32,060 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2020-10-24 02:29:32,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:29:32,060 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2020-10-24 02:29:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-24 02:29:32,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:32,061 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:32,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:29:32,061 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:32,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:32,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1571183029, now seen corresponding path program 7 times [2020-10-24 02:29:32,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:32,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983070111] [2020-10-24 02:29:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:32,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-24 02:29:32,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983070111] [2020-10-24 02:29:32,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:32,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-24 02:29:32,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935651162] [2020-10-24 02:29:32,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-24 02:29:32,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:32,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-24 02:29:32,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:29:32,429 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 19 states. [2020-10-24 02:29:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:33,601 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-10-24 02:29:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:29:33,601 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-10-24 02:29:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:33,602 INFO L225 Difference]: With dead ends: 74 [2020-10-24 02:29:33,602 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 02:29:33,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:29:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 02:29:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 02:29:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 02:29:33,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 02:29:33,604 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-10-24 02:29:33,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:33,604 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 02:29:33,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-24 02:29:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 02:29:33,605 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 02:29:33,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:29:33,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 02:29:33,855 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 66 [2020-10-24 02:29:33,981 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 52 [2020-10-24 02:29:34,153 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2020-10-24 02:29:34,593 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2020-10-24 02:29:35,632 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 12) the Hoare annotation is: true [2020-10-24 02:29:35,633 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-24 02:29:35,633 INFO L277 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-10-24 02:29:35,633 INFO L277 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-10-24 02:29:35,633 INFO L277 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-10-24 02:29:35,633 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: true [2020-10-24 02:29:35,633 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:35,633 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:35,633 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2020-10-24 02:29:35,633 INFO L277 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-10-24 02:29:35,634 INFO L277 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-10-24 02:29:35,634 INFO L277 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-10-24 02:29:35,634 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-24 02:29:35,634 INFO L277 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-10-24 02:29:35,634 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:29:35,634 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:29:35,634 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:35,635 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-24 02:29:35,635 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-24 02:29:35,635 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-24 02:29:35,635 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-24 02:29:35,635 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:35,635 INFO L274 CegarLoopResult]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:35,636 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:35,636 INFO L270 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-24 02:29:35,636 INFO L270 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (+ (* 3 main_~i~0) 1))) (and (<= .cse0 .cse1) (<= .cse1 (* 3 main_~n~0)) (<= .cse1 .cse0))) [2020-10-24 02:29:35,636 INFO L270 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-24 02:29:35,636 INFO L270 CegarLoopResult]: At program point L29-1(lines 29 35) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-24 02:29:35,636 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0)) [2020-10-24 02:29:35,637 INFO L270 CegarLoopResult]: At program point L29-2(line 29) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-24 02:29:35,637 INFO L270 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0)) [2020-10-24 02:29:35,637 INFO L277 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-10-24 02:29:35,638 INFO L270 CegarLoopResult]: At program point L29-4(line 29) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-24 02:29:35,638 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 24 40) the Hoare annotation is: true [2020-10-24 02:29:35,638 INFO L277 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: true [2020-10-24 02:29:35,638 INFO L270 CegarLoopResult]: At program point L29-5(lines 29 35) the Hoare annotation is: (let ((.cse0 (+ (* 3 main_~i~0) 3)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 3 main_~n~0)))) [2020-10-24 02:29:35,638 INFO L277 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: true [2020-10-24 02:29:35,638 INFO L277 CegarLoopResult]: At program point mainFINAL(lines 24 40) the Hoare annotation is: true [2020-10-24 02:29:35,638 INFO L277 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: true [2020-10-24 02:29:35,638 INFO L270 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (let ((.cse1 (+ (* 3 main_~i~0) 2)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= (+ main_~a~0 main_~b~0 1) (* 3 main_~n~0)))) [2020-10-24 02:29:35,639 INFO L270 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-24 02:29:35,639 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 40) the Hoare annotation is: true [2020-10-24 02:29:35,640 INFO L277 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-10-24 02:29:35,640 INFO L270 CegarLoopResult]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 (* 3 main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-10-24 02:29:35,640 INFO L270 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (= main_~i~0 0) [2020-10-24 02:29:35,640 INFO L270 CegarLoopResult]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse1 (* 3 main_~n~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-24 02:29:35,640 INFO L270 CegarLoopResult]: At program point L26-2(line 26) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0)) [2020-10-24 02:29:35,640 INFO L270 CegarLoopResult]: At program point L26-3(line 26) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0)) [2020-10-24 02:29:35,640 INFO L270 CegarLoopResult]: At program point L26-4(line 26) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0)) [2020-10-24 02:29:35,641 INFO L270 CegarLoopResult]: At program point L26-5(line 26) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0)) [2020-10-24 02:29:35,641 INFO L270 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:29:35,641 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-24 02:29:35,641 INFO L270 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:29:35,641 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:29:35,641 INFO L270 CegarLoopResult]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:29:35,642 INFO L270 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:29:35,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:29:35 BoogieIcfgContainer [2020-10-24 02:29:35,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:29:35,667 INFO L168 Benchmark]: Toolchain (without parser) took 23291.96 ms. Allocated memory was 151.0 MB in the beginning and 317.7 MB in the end (delta: 166.7 MB). Free memory was 127.4 MB in the beginning and 216.3 MB in the end (delta: -88.9 MB). Peak memory consumption was 184.8 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:35,668 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:29:35,669 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.85 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:35,669 INFO L168 Benchmark]: Boogie Preprocessor took 61.44 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:35,672 INFO L168 Benchmark]: RCFGBuilder took 417.62 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 100.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:35,677 INFO L168 Benchmark]: TraceAbstraction took 22416.52 ms. Allocated memory was 151.0 MB in the beginning and 317.7 MB in the end (delta: 166.7 MB). Free memory was 99.8 MB in the beginning and 216.3 MB in the end (delta: -116.5 MB). Peak memory consumption was 157.6 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:35,683 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 381.85 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.44 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 417.62 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 100.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22416.52 ms. Allocated memory was 151.0 MB in the beginning and 317.7 MB in the end (delta: 166.7 MB). Free memory was 99.8 MB in the beginning and 216.3 MB in the end (delta: -116.5 MB). Peak memory consumption was 157.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i - ProcedureContractResult [Line: 12]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.2s, OverallIterations: 13, TraceHistogramMax: 4, AutomataDifference: 14.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 424 SDtfs, 1174 SDslu, 1561 SDs, 0 SdLazy, 3595 SolverSat, 343 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 432 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 13.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 199 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 51 LocationsWithAnnotation, 207 PreInvPairs, 283 NumberOfFragments, 396 HoareAnnotationTreeSize, 207 FomulaSimplifications, 7518688 FormulaSimplificationTreeSizeReduction, 1.2s HoareSimplificationTime, 51 FomulaSimplificationsInter, 1868 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 580 NumberOfCodeBlocks, 580 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 567 ConstructedInterpolants, 0 QuantifiedInterpolants, 220150 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 11/165 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...