/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:00:41,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:00:41,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:00:41,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-07 14:00:41,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:00:41,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:00:41,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:00:41,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:00:41,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:00:41,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:00:41,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:00:41,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:00:41,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:00:41,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:00:41,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:00:41,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:00:41,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:00:41,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:00:41,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:00:41,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:00:41,902 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:00:41,919 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:00:41,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:00:41,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:00:41,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:00:41,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:00:41,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:00:41,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:00:41,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:00:41,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:00:41,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:00:41,923 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:00:41,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:00:41,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:00:41,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:00:41,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:00:41,924 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:00:41,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:00:41,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:00:41,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:00:41,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:00:41,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:00:41,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:00:41,926 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:00:42,190 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:00:42,200 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:00:42,204 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:00:42,205 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:00:42,206 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:00:42,206 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-07-07 14:00:42,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a1b30ce8/b8683b274c3e4788a834a65a18eabf6f/FLAG67e3333c9 [2020-07-07 14:00:42,654 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:00:42,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-07-07 14:00:42,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a1b30ce8/b8683b274c3e4788a834a65a18eabf6f/FLAG67e3333c9 [2020-07-07 14:00:43,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a1b30ce8/b8683b274c3e4788a834a65a18eabf6f [2020-07-07 14:00:43,118 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:00:43,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:00:43,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:00:43,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:00:43,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:00:43,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:00:43" (1/1) ... [2020-07-07 14:00:43,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b754fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:43, skipping insertion in model container [2020-07-07 14:00:43,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:00:43" (1/1) ... [2020-07-07 14:00:43,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:00:43,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:00:43,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:00:43,337 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:00:43,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:00:43,374 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:00:43,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:43 WrapperNode [2020-07-07 14:00:43,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:00:43,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:00:43,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:00:43,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:00:43,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:43" (1/1) ... [2020-07-07 14:00:43,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:43" (1/1) ... [2020-07-07 14:00:43,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:43" (1/1) ... [2020-07-07 14:00:43,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:43" (1/1) ... [2020-07-07 14:00:43,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:43" (1/1) ... [2020-07-07 14:00:43,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:43" (1/1) ... [2020-07-07 14:00:43,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:43" (1/1) ... [2020-07-07 14:00:43,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:00:43,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:00:43,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:00:43,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:00:43,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:43" (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 [2020-07-07 14:00:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:00:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:00:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:00:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:00:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:00:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:00:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:00:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:00:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:00:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:00:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:00:43,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:00:43,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:00:43,922 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:00:43,922 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 14:00:43,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:00:43 BoogieIcfgContainer [2020-07-07 14:00:43,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:00:43,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:00:43,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:00:43,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:00:43,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:00:43" (1/3) ... [2020-07-07 14:00:43,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d317f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:00:43, skipping insertion in model container [2020-07-07 14:00:43,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:00:43" (2/3) ... [2020-07-07 14:00:43,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d317f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:00:43, skipping insertion in model container [2020-07-07 14:00:43,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:00:43" (3/3) ... [2020-07-07 14:00:43,937 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2020-07-07 14:00:43,948 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:00:43,956 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:00:43,972 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:00:44,005 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:00:44,005 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:00:44,006 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:00:44,006 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:00:44,006 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:00:44,006 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:00:44,008 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:00:44,008 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:00:44,040 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-07-07 14:00:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 14:00:44,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:44,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:44,056 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:44,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:44,067 INFO L82 PathProgramCache]: Analyzing trace with hash -537390573, now seen corresponding path program 1 times [2020-07-07 14:00:44,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:44,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190611389] [2020-07-07 14:00:44,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:44,282 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:44,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190611389] [2020-07-07 14:00:44,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:44,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 14:00:44,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927638665] [2020-07-07 14:00:44,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 14:00:44,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 14:00:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:00:44,314 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 2 states. [2020-07-07 14:00:44,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:44,361 INFO L93 Difference]: Finished difference Result 134 states and 203 transitions. [2020-07-07 14:00:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 14:00:44,363 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-07-07 14:00:44,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:44,375 INFO L225 Difference]: With dead ends: 134 [2020-07-07 14:00:44,375 INFO L226 Difference]: Without dead ends: 69 [2020-07-07 14:00:44,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:00:44,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-07 14:00:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-07 14:00:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-07 14:00:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-07-07 14:00:44,446 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 19 [2020-07-07 14:00:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:44,447 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-07-07 14:00:44,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 14:00:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-07-07 14:00:44,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 14:00:44,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:44,449 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] [2020-07-07 14:00:44,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:00:44,450 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:44,450 INFO L82 PathProgramCache]: Analyzing trace with hash 471335344, now seen corresponding path program 1 times [2020-07-07 14:00:44,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:44,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040163220] [2020-07-07 14:00:44,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:44,574 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:44,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040163220] [2020-07-07 14:00:44,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:44,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:00:44,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398378712] [2020-07-07 14:00:44,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:00:44,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:44,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:00:44,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:00:44,577 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 5 states. [2020-07-07 14:00:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:44,760 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2020-07-07 14:00:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 14:00:44,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-07 14:00:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:44,764 INFO L225 Difference]: With dead ends: 91 [2020-07-07 14:00:44,764 INFO L226 Difference]: Without dead ends: 89 [2020-07-07 14:00:44,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 14:00:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-07 14:00:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-07-07 14:00:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-07 14:00:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2020-07-07 14:00:44,790 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 20 [2020-07-07 14:00:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:44,791 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2020-07-07 14:00:44,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:00:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2020-07-07 14:00:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 14:00:44,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:44,793 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:44,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:00:44,793 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:44,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1383579147, now seen corresponding path program 1 times [2020-07-07 14:00:44,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:44,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909504559] [2020-07-07 14:00:44,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:44,894 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:44,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909504559] [2020-07-07 14:00:44,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:44,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:00:44,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265891339] [2020-07-07 14:00:44,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:00:44,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:44,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:00:44,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:00:44,896 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand 5 states. [2020-07-07 14:00:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:45,002 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2020-07-07 14:00:45,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 14:00:45,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-07-07 14:00:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:45,009 INFO L225 Difference]: With dead ends: 88 [2020-07-07 14:00:45,009 INFO L226 Difference]: Without dead ends: 78 [2020-07-07 14:00:45,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 14:00:45,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-07 14:00:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-07 14:00:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-07 14:00:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2020-07-07 14:00:45,029 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 25 [2020-07-07 14:00:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:45,030 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2020-07-07 14:00:45,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:00:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2020-07-07 14:00:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 14:00:45,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:45,033 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:45,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:00:45,033 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash 344115466, now seen corresponding path program 1 times [2020-07-07 14:00:45,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:45,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105572254] [2020-07-07 14:00:45,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:45,128 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:45,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105572254] [2020-07-07 14:00:45,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:45,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:00:45,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994620289] [2020-07-07 14:00:45,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:00:45,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:00:45,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:00:45,131 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 7 states. [2020-07-07 14:00:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:45,344 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-07-07 14:00:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 14:00:45,344 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-07 14:00:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:45,346 INFO L225 Difference]: With dead ends: 90 [2020-07-07 14:00:45,347 INFO L226 Difference]: Without dead ends: 88 [2020-07-07 14:00:45,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:00:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-07 14:00:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-07-07 14:00:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-07 14:00:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-07-07 14:00:45,363 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 28 [2020-07-07 14:00:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:45,364 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-07-07 14:00:45,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:00:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-07-07 14:00:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 14:00:45,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:45,366 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-07 14:00:45,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 14:00:45,367 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:45,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1469174755, now seen corresponding path program 1 times [2020-07-07 14:00:45,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:45,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138993124] [2020-07-07 14:00:45,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:45,460 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:45,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138993124] [2020-07-07 14:00:45,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:45,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:00:45,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263142910] [2020-07-07 14:00:45,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:00:45,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:45,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:00:45,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:00:45,463 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 7 states. [2020-07-07 14:00:45,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:45,681 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-07-07 14:00:45,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 14:00:45,681 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-07 14:00:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:45,684 INFO L225 Difference]: With dead ends: 94 [2020-07-07 14:00:45,684 INFO L226 Difference]: Without dead ends: 85 [2020-07-07 14:00:45,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:00:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-07 14:00:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-07-07 14:00:45,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-07 14:00:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-07-07 14:00:45,710 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 38 [2020-07-07 14:00:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:45,711 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-07-07 14:00:45,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:00:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-07-07 14:00:45,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 14:00:45,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:45,715 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:45,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 14:00:45,716 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:45,717 INFO L82 PathProgramCache]: Analyzing trace with hash 859677550, now seen corresponding path program 1 times [2020-07-07 14:00:45,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:45,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145610659] [2020-07-07 14:00:45,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:45,840 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:45,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145610659] [2020-07-07 14:00:45,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:45,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:00:45,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382424301] [2020-07-07 14:00:45,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:00:45,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:00:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:00:45,843 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 7 states. [2020-07-07 14:00:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:45,995 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-07-07 14:00:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 14:00:45,996 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-07-07 14:00:45,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:45,998 INFO L225 Difference]: With dead ends: 91 [2020-07-07 14:00:45,998 INFO L226 Difference]: Without dead ends: 89 [2020-07-07 14:00:45,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:00:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-07 14:00:46,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-07-07 14:00:46,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-07 14:00:46,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-07-07 14:00:46,012 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 41 [2020-07-07 14:00:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:46,013 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-07-07 14:00:46,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:00:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-07-07 14:00:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-07 14:00:46,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:46,015 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-07 14:00:46,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 14:00:46,016 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:46,016 INFO L82 PathProgramCache]: Analyzing trace with hash -943144682, now seen corresponding path program 1 times [2020-07-07 14:00:46,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:46,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971266403] [2020-07-07 14:00:46,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:46,121 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:46,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971266403] [2020-07-07 14:00:46,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:46,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:00:46,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740396875] [2020-07-07 14:00:46,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:00:46,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:46,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:00:46,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:00:46,125 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 7 states. [2020-07-07 14:00:46,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:46,296 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2020-07-07 14:00:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 14:00:46,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-07-07 14:00:46,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:46,299 INFO L225 Difference]: With dead ends: 120 [2020-07-07 14:00:46,299 INFO L226 Difference]: Without dead ends: 118 [2020-07-07 14:00:46,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:00:46,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-07 14:00:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2020-07-07 14:00:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-07 14:00:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-07-07 14:00:46,319 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 44 [2020-07-07 14:00:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:46,319 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-07-07 14:00:46,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:00:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-07-07 14:00:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-07 14:00:46,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:46,322 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:46,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 14:00:46,322 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:46,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1177695863, now seen corresponding path program 2 times [2020-07-07 14:00:46,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:46,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956975484] [2020-07-07 14:00:46,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:46,484 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:46,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956975484] [2020-07-07 14:00:46,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:46,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 14:00:46,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936549204] [2020-07-07 14:00:46,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 14:00:46,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:46,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 14:00:46,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:00:46,490 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 8 states. [2020-07-07 14:00:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:46,672 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-07-07 14:00:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 14:00:46,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-07-07 14:00:46,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:46,679 INFO L225 Difference]: With dead ends: 115 [2020-07-07 14:00:46,679 INFO L226 Difference]: Without dead ends: 113 [2020-07-07 14:00:46,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:00:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-07 14:00:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-07-07 14:00:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-07 14:00:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2020-07-07 14:00:46,716 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 46 [2020-07-07 14:00:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:46,717 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2020-07-07 14:00:46,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 14:00:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2020-07-07 14:00:46,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 14:00:46,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:46,726 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:46,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 14:00:46,726 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:46,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1826770767, now seen corresponding path program 1 times [2020-07-07 14:00:46,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:46,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353533510] [2020-07-07 14:00:46,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:46,833 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:46,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353533510] [2020-07-07 14:00:46,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:46,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 14:00:46,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739441666] [2020-07-07 14:00:46,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 14:00:46,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:46,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 14:00:46,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:00:46,835 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand 8 states. [2020-07-07 14:00:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:47,061 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2020-07-07 14:00:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 14:00:47,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-07-07 14:00:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:47,064 INFO L225 Difference]: With dead ends: 128 [2020-07-07 14:00:47,064 INFO L226 Difference]: Without dead ends: 123 [2020-07-07 14:00:47,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:00:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-07 14:00:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-07-07 14:00:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-07 14:00:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2020-07-07 14:00:47,092 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 49 [2020-07-07 14:00:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:47,093 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2020-07-07 14:00:47,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 14:00:47,095 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2020-07-07 14:00:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-07 14:00:47,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:47,097 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:47,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 14:00:47,098 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:47,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1519048418, now seen corresponding path program 1 times [2020-07-07 14:00:47,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:47,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787491728] [2020-07-07 14:00:47,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:47,192 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:47,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787491728] [2020-07-07 14:00:47,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:47,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 14:00:47,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66104150] [2020-07-07 14:00:47,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 14:00:47,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:47,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 14:00:47,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:00:47,195 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand 9 states. [2020-07-07 14:00:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:47,406 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2020-07-07 14:00:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 14:00:47,406 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-07-07 14:00:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:47,408 INFO L225 Difference]: With dead ends: 135 [2020-07-07 14:00:47,408 INFO L226 Difference]: Without dead ends: 133 [2020-07-07 14:00:47,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:00:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-07 14:00:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2020-07-07 14:00:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-07 14:00:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2020-07-07 14:00:47,428 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 58 [2020-07-07 14:00:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:47,429 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2020-07-07 14:00:47,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 14:00:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2020-07-07 14:00:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-07 14:00:47,432 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:47,432 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:47,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 14:00:47,432 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1733407875, now seen corresponding path program 1 times [2020-07-07 14:00:47,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:47,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052185120] [2020-07-07 14:00:47,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:47,536 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:47,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052185120] [2020-07-07 14:00:47,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:47,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 14:00:47,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497123058] [2020-07-07 14:00:47,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 14:00:47,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:47,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 14:00:47,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:00:47,538 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand 9 states. [2020-07-07 14:00:47,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:47,762 INFO L93 Difference]: Finished difference Result 158 states and 182 transitions. [2020-07-07 14:00:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 14:00:47,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-07-07 14:00:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:47,765 INFO L225 Difference]: With dead ends: 158 [2020-07-07 14:00:47,765 INFO L226 Difference]: Without dead ends: 156 [2020-07-07 14:00:47,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:00:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-07 14:00:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2020-07-07 14:00:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-07 14:00:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2020-07-07 14:00:47,785 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 62 [2020-07-07 14:00:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:47,786 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2020-07-07 14:00:47,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 14:00:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2020-07-07 14:00:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-07 14:00:47,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:47,787 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:47,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 14:00:47,788 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:47,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:47,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1967257859, now seen corresponding path program 1 times [2020-07-07 14:00:47,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:47,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523719629] [2020-07-07 14:00:47,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:47,916 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:47,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523719629] [2020-07-07 14:00:47,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:47,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 14:00:47,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448807890] [2020-07-07 14:00:47,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 14:00:47,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:47,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 14:00:47,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:00:47,918 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand 9 states. [2020-07-07 14:00:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:48,156 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-07-07 14:00:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 14:00:48,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-07-07 14:00:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:48,161 INFO L225 Difference]: With dead ends: 158 [2020-07-07 14:00:48,162 INFO L226 Difference]: Without dead ends: 156 [2020-07-07 14:00:48,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-07 14:00:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-07 14:00:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2020-07-07 14:00:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-07 14:00:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 174 transitions. [2020-07-07 14:00:48,198 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 174 transitions. Word has length 63 [2020-07-07 14:00:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:48,199 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 174 transitions. [2020-07-07 14:00:48,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 14:00:48,199 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 174 transitions. [2020-07-07 14:00:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-07 14:00:48,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:48,200 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:48,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 14:00:48,201 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash -822659134, now seen corresponding path program 1 times [2020-07-07 14:00:48,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:48,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797608988] [2020-07-07 14:00:48,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:48,297 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:48,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797608988] [2020-07-07 14:00:48,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:48,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 14:00:48,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861763091] [2020-07-07 14:00:48,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 14:00:48,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:48,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 14:00:48,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:00:48,299 INFO L87 Difference]: Start difference. First operand 152 states and 174 transitions. Second operand 9 states. [2020-07-07 14:00:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:48,509 INFO L93 Difference]: Finished difference Result 187 states and 216 transitions. [2020-07-07 14:00:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 14:00:48,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-07-07 14:00:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:48,514 INFO L225 Difference]: With dead ends: 187 [2020-07-07 14:00:48,514 INFO L226 Difference]: Without dead ends: 185 [2020-07-07 14:00:48,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:00:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-07-07 14:00:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 177. [2020-07-07 14:00:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-07 14:00:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 205 transitions. [2020-07-07 14:00:48,540 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 205 transitions. Word has length 65 [2020-07-07 14:00:48,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:48,540 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 205 transitions. [2020-07-07 14:00:48,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 14:00:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 205 transitions. [2020-07-07 14:00:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-07 14:00:48,541 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:48,542 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:48,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 14:00:48,542 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:48,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1510377470, now seen corresponding path program 1 times [2020-07-07 14:00:48,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:48,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175453283] [2020-07-07 14:00:48,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:48,696 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:48,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175453283] [2020-07-07 14:00:48,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:48,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 14:00:48,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952486175] [2020-07-07 14:00:48,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 14:00:48,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:48,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 14:00:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:00:48,700 INFO L87 Difference]: Start difference. First operand 177 states and 205 transitions. Second operand 9 states. [2020-07-07 14:00:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:48,958 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2020-07-07 14:00:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 14:00:48,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-07-07 14:00:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:48,962 INFO L225 Difference]: With dead ends: 192 [2020-07-07 14:00:48,963 INFO L226 Difference]: Without dead ends: 187 [2020-07-07 14:00:48,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-07 14:00:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-07 14:00:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2020-07-07 14:00:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-07-07 14:00:48,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 208 transitions. [2020-07-07 14:00:48,990 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 208 transitions. Word has length 67 [2020-07-07 14:00:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:48,990 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 208 transitions. [2020-07-07 14:00:48,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 14:00:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 208 transitions. [2020-07-07 14:00:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-07 14:00:48,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:48,996 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:48,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 14:00:48,997 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:48,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:48,998 INFO L82 PathProgramCache]: Analyzing trace with hash 869213219, now seen corresponding path program 2 times [2020-07-07 14:00:48,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:48,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98898260] [2020-07-07 14:00:48,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:49,128 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:49,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98898260] [2020-07-07 14:00:49,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:49,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 14:00:49,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211625825] [2020-07-07 14:00:49,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 14:00:49,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:49,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 14:00:49,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:00:49,131 INFO L87 Difference]: Start difference. First operand 181 states and 208 transitions. Second operand 9 states. [2020-07-07 14:00:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:49,364 INFO L93 Difference]: Finished difference Result 193 states and 220 transitions. [2020-07-07 14:00:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 14:00:49,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-07-07 14:00:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:49,366 INFO L225 Difference]: With dead ends: 193 [2020-07-07 14:00:49,366 INFO L226 Difference]: Without dead ends: 188 [2020-07-07 14:00:49,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-07 14:00:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-07 14:00:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2020-07-07 14:00:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-07 14:00:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2020-07-07 14:00:49,384 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 70 [2020-07-07 14:00:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:49,385 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2020-07-07 14:00:49,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 14:00:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2020-07-07 14:00:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-07 14:00:49,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:49,387 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:49,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 14:00:49,387 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:49,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:49,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1269119089, now seen corresponding path program 1 times [2020-07-07 14:00:49,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:49,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897616616] [2020-07-07 14:00:49,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:49,487 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:49,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897616616] [2020-07-07 14:00:49,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:49,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:00:49,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418776945] [2020-07-07 14:00:49,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:00:49,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:49,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:00:49,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:00:49,489 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand 11 states. [2020-07-07 14:00:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:49,768 INFO L93 Difference]: Finished difference Result 202 states and 228 transitions. [2020-07-07 14:00:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 14:00:49,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-07-07 14:00:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:49,771 INFO L225 Difference]: With dead ends: 202 [2020-07-07 14:00:49,771 INFO L226 Difference]: Without dead ends: 200 [2020-07-07 14:00:49,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-07 14:00:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-07 14:00:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 193. [2020-07-07 14:00:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-07 14:00:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 218 transitions. [2020-07-07 14:00:49,788 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 218 transitions. Word has length 76 [2020-07-07 14:00:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:49,789 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 218 transitions. [2020-07-07 14:00:49,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:00:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 218 transitions. [2020-07-07 14:00:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 14:00:49,790 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:49,791 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:49,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 14:00:49,791 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:49,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:49,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1147260786, now seen corresponding path program 1 times [2020-07-07 14:00:49,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:49,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684570564] [2020-07-07 14:00:49,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:49,890 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:49,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684570564] [2020-07-07 14:00:49,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:49,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:00:49,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354969210] [2020-07-07 14:00:49,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:00:49,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:49,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:00:49,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:00:49,892 INFO L87 Difference]: Start difference. First operand 193 states and 218 transitions. Second operand 11 states. [2020-07-07 14:00:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:50,171 INFO L93 Difference]: Finished difference Result 234 states and 268 transitions. [2020-07-07 14:00:50,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 14:00:50,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-07-07 14:00:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:50,175 INFO L225 Difference]: With dead ends: 234 [2020-07-07 14:00:50,175 INFO L226 Difference]: Without dead ends: 232 [2020-07-07 14:00:50,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:00:50,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-07 14:00:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 223. [2020-07-07 14:00:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-07 14:00:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 255 transitions. [2020-07-07 14:00:50,193 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 255 transitions. Word has length 79 [2020-07-07 14:00:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:50,194 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 255 transitions. [2020-07-07 14:00:50,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:00:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 255 transitions. [2020-07-07 14:00:50,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 14:00:50,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:50,196 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:50,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 14:00:50,196 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:50,196 INFO L82 PathProgramCache]: Analyzing trace with hash 341113206, now seen corresponding path program 2 times [2020-07-07 14:00:50,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:50,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817877523] [2020-07-07 14:00:50,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:50,312 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:50,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817877523] [2020-07-07 14:00:50,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:50,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:00:50,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935498205] [2020-07-07 14:00:50,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:00:50,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:50,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:00:50,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:00:50,314 INFO L87 Difference]: Start difference. First operand 223 states and 255 transitions. Second operand 11 states. [2020-07-07 14:00:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:50,576 INFO L93 Difference]: Finished difference Result 264 states and 305 transitions. [2020-07-07 14:00:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 14:00:50,577 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-07-07 14:00:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:50,579 INFO L225 Difference]: With dead ends: 264 [2020-07-07 14:00:50,579 INFO L226 Difference]: Without dead ends: 262 [2020-07-07 14:00:50,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:00:50,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-07 14:00:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 223. [2020-07-07 14:00:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-07 14:00:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 255 transitions. [2020-07-07 14:00:50,598 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 255 transitions. Word has length 79 [2020-07-07 14:00:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:50,598 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 255 transitions. [2020-07-07 14:00:50,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:00:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 255 transitions. [2020-07-07 14:00:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-07 14:00:50,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:50,600 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:50,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 14:00:50,600 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1759613834, now seen corresponding path program 1 times [2020-07-07 14:00:50,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:50,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033093366] [2020-07-07 14:00:50,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:50,738 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:50,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033093366] [2020-07-07 14:00:50,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:50,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 14:00:50,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334868395] [2020-07-07 14:00:50,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 14:00:50,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:50,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 14:00:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:00:50,741 INFO L87 Difference]: Start difference. First operand 223 states and 255 transitions. Second operand 10 states. [2020-07-07 14:00:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:51,031 INFO L93 Difference]: Finished difference Result 236 states and 268 transitions. [2020-07-07 14:00:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 14:00:51,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-07-07 14:00:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:51,035 INFO L225 Difference]: With dead ends: 236 [2020-07-07 14:00:51,035 INFO L226 Difference]: Without dead ends: 234 [2020-07-07 14:00:51,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-07-07 14:00:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-07 14:00:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2020-07-07 14:00:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-07 14:00:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 260 transitions. [2020-07-07 14:00:51,068 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 260 transitions. Word has length 81 [2020-07-07 14:00:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:51,068 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 260 transitions. [2020-07-07 14:00:51,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 14:00:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 260 transitions. [2020-07-07 14:00:51,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-07 14:00:51,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:51,071 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:51,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 14:00:51,071 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:51,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash -343631243, now seen corresponding path program 1 times [2020-07-07 14:00:51,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:51,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637778966] [2020-07-07 14:00:51,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:51,196 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:51,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637778966] [2020-07-07 14:00:51,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:51,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:00:51,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289753529] [2020-07-07 14:00:51,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:00:51,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:51,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:00:51,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:00:51,198 INFO L87 Difference]: Start difference. First operand 228 states and 260 transitions. Second operand 11 states. [2020-07-07 14:00:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:51,461 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2020-07-07 14:00:51,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 14:00:51,462 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-07-07 14:00:51,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:51,463 INFO L225 Difference]: With dead ends: 263 [2020-07-07 14:00:51,464 INFO L226 Difference]: Without dead ends: 261 [2020-07-07 14:00:51,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-07 14:00:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-07 14:00:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 253. [2020-07-07 14:00:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-07-07 14:00:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 291 transitions. [2020-07-07 14:00:51,484 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 291 transitions. Word has length 83 [2020-07-07 14:00:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:51,484 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 291 transitions. [2020-07-07 14:00:51,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:00:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 291 transitions. [2020-07-07 14:00:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-07 14:00:51,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:51,487 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:51,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 14:00:51,489 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:51,489 INFO L82 PathProgramCache]: Analyzing trace with hash -857748777, now seen corresponding path program 3 times [2020-07-07 14:00:51,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:51,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614635738] [2020-07-07 14:00:51,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:51,650 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:51,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614635738] [2020-07-07 14:00:51,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:51,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 14:00:51,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146021856] [2020-07-07 14:00:51,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 14:00:51,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:51,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 14:00:51,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:00:51,653 INFO L87 Difference]: Start difference. First operand 253 states and 291 transitions. Second operand 10 states. [2020-07-07 14:00:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:51,936 INFO L93 Difference]: Finished difference Result 262 states and 299 transitions. [2020-07-07 14:00:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 14:00:51,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-07-07 14:00:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:51,938 INFO L225 Difference]: With dead ends: 262 [2020-07-07 14:00:51,938 INFO L226 Difference]: Without dead ends: 152 [2020-07-07 14:00:51,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-07-07 14:00:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-07 14:00:51,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-07-07 14:00:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-07 14:00:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2020-07-07 14:00:51,950 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 84 [2020-07-07 14:00:51,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:51,950 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2020-07-07 14:00:51,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 14:00:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2020-07-07 14:00:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-07-07 14:00:51,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:51,954 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:51,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 14:00:51,954 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:51,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1405253968, now seen corresponding path program 2 times [2020-07-07 14:00:51,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:51,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207143051] [2020-07-07 14:00:51,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:52,099 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:52,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207143051] [2020-07-07 14:00:52,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:52,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 14:00:52,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876212300] [2020-07-07 14:00:52,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 14:00:52,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:52,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 14:00:52,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:00:52,102 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand 10 states. [2020-07-07 14:00:52,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:52,390 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2020-07-07 14:00:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 14:00:52,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-07-07 14:00:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:52,395 INFO L225 Difference]: With dead ends: 160 [2020-07-07 14:00:52,395 INFO L226 Difference]: Without dead ends: 155 [2020-07-07 14:00:52,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-07-07 14:00:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-07 14:00:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-07-07 14:00:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-07 14:00:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2020-07-07 14:00:52,414 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 88 [2020-07-07 14:00:52,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:52,414 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2020-07-07 14:00:52,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 14:00:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2020-07-07 14:00:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-07 14:00:52,416 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:52,416 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:52,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 14:00:52,416 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash 813915649, now seen corresponding path program 1 times [2020-07-07 14:00:52,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:52,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451229881] [2020-07-07 14:00:52,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:52,552 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:52,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451229881] [2020-07-07 14:00:52,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:52,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 14:00:52,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569030602] [2020-07-07 14:00:52,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 14:00:52,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:52,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 14:00:52,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:00:52,560 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand 13 states. [2020-07-07 14:00:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:52,883 INFO L93 Difference]: Finished difference Result 194 states and 221 transitions. [2020-07-07 14:00:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 14:00:52,883 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-07-07 14:00:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:52,887 INFO L225 Difference]: With dead ends: 194 [2020-07-07 14:00:52,887 INFO L226 Difference]: Without dead ends: 192 [2020-07-07 14:00:52,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-07-07 14:00:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-07 14:00:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2020-07-07 14:00:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-07 14:00:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 208 transitions. [2020-07-07 14:00:52,900 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 208 transitions. Word has length 97 [2020-07-07 14:00:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:52,900 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 208 transitions. [2020-07-07 14:00:52,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 14:00:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 208 transitions. [2020-07-07 14:00:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-07 14:00:52,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:52,902 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:52,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 14:00:52,902 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:52,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:52,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1992677655, now seen corresponding path program 2 times [2020-07-07 14:00:52,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:52,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617244731] [2020-07-07 14:00:52,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:53,054 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:53,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617244731] [2020-07-07 14:00:53,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:53,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 14:00:53,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183014763] [2020-07-07 14:00:53,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 14:00:53,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:53,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 14:00:53,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:00:53,056 INFO L87 Difference]: Start difference. First operand 183 states and 208 transitions. Second operand 13 states. [2020-07-07 14:00:53,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:53,363 INFO L93 Difference]: Finished difference Result 198 states and 224 transitions. [2020-07-07 14:00:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 14:00:53,363 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-07-07 14:00:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:53,365 INFO L225 Difference]: With dead ends: 198 [2020-07-07 14:00:53,365 INFO L226 Difference]: Without dead ends: 196 [2020-07-07 14:00:53,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-07-07 14:00:53,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-07 14:00:53,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2020-07-07 14:00:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-07 14:00:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2020-07-07 14:00:53,378 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 97 [2020-07-07 14:00:53,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:53,378 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2020-07-07 14:00:53,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 14:00:53,378 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2020-07-07 14:00:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-07 14:00:53,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:53,380 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:53,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-07 14:00:53,380 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:53,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:53,381 INFO L82 PathProgramCache]: Analyzing trace with hash 762056004, now seen corresponding path program 3 times [2020-07-07 14:00:53,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:53,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383457921] [2020-07-07 14:00:53,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:53,542 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:53,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383457921] [2020-07-07 14:00:53,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:53,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:00:53,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458432518] [2020-07-07 14:00:53,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:00:53,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:00:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:00:53,544 INFO L87 Difference]: Start difference. First operand 157 states and 174 transitions. Second operand 11 states. [2020-07-07 14:00:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:53,889 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2020-07-07 14:00:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 14:00:53,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 102 [2020-07-07 14:00:53,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:53,891 INFO L225 Difference]: With dead ends: 157 [2020-07-07 14:00:53,891 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 14:00:53,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-07-07 14:00:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 14:00:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 14:00:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 14:00:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 14:00:53,894 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2020-07-07 14:00:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:53,895 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 14:00:53,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:00:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 14:00:53,895 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 14:00:53,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-07 14:00:53,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 14:00:55,732 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 14:00:55,732 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-07 14:00:55,733 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-07 14:00:55,733 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 14:00:55,733 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 14:00:55,733 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-07 14:00:55,733 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:00:55,733 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:00:55,733 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-07 14:00:55,735 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-07-07 14:00:55,735 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:00:55,735 INFO L264 CegarLoopResult]: At program point L60(line 60) the Hoare annotation is: (and (<= (+ |main_#t~post9| 1) main_~tagbuf_len~0) (<= 1 |main_#t~post9|) (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,735 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,735 INFO L264 CegarLoopResult]: At program point L60-1(line 60) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= (+ |main_#t~post9| 1) main_~tagbuf_len~0) (<= 1 |main_#t~post9|) (<= 2 main_~t~0)) [2020-07-07 14:00:55,735 INFO L264 CegarLoopResult]: At program point L27-1(lines 27 29) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,736 INFO L264 CegarLoopResult]: At program point L27-2(line 27) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,736 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 66) the Hoare annotation is: true [2020-07-07 14:00:55,736 INFO L264 CegarLoopResult]: At program point L27-3(line 27) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,736 INFO L264 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,736 INFO L264 CegarLoopResult]: At program point L44-1(lines 44 53) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,736 INFO L264 CegarLoopResult]: At program point L44-2(line 44) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,736 INFO L264 CegarLoopResult]: At program point L44-4(line 44) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,737 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= (+ |main_#t~post4| 1) main_~tagbuf_len~0) (<= 0 |main_#t~post4|) (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,737 INFO L264 CegarLoopResult]: At program point L36-1(line 36) the Hoare annotation is: (and (<= (+ |main_#t~post4| 1) main_~tagbuf_len~0) (<= 0 |main_#t~post4|) (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,737 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,737 INFO L264 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,737 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-07 14:00:55,737 INFO L264 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,738 INFO L264 CegarLoopResult]: At program point L45-1(line 45) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,738 INFO L264 CegarLoopResult]: At program point L37-2(lines 37 61) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,738 INFO L264 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,738 INFO L264 CegarLoopResult]: At program point L62(line 62) the Hoare annotation is: (and (<= 0 main_~tagbuf_len~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,738 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 33) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-07 14:00:55,738 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 33) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,738 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,739 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 66) the Hoare annotation is: true [2020-07-07 14:00:55,739 INFO L264 CegarLoopResult]: At program point L38(lines 38 42) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,739 INFO L271 CegarLoopResult]: At program point L63(lines 14 66) the Hoare annotation is: true [2020-07-07 14:00:55,739 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,739 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 66) the Hoare annotation is: true [2020-07-07 14:00:55,739 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,739 INFO L264 CegarLoopResult]: At program point L55(line 55) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,740 INFO L264 CegarLoopResult]: At program point L22(lines 22 26) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-07 14:00:55,740 INFO L264 CegarLoopResult]: At program point L55-1(lines 55 57) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,740 INFO L264 CegarLoopResult]: At program point L55-2(line 55) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,740 INFO L264 CegarLoopResult]: At program point L55-3(line 55) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,740 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= (+ |main_#t~post7| 1) main_~tagbuf_len~0) (<= 1 |main_#t~post7|) (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,740 INFO L264 CegarLoopResult]: At program point L47-1(line 47) the Hoare annotation is: (and (<= (+ |main_#t~post7| 1) main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 1 |main_#t~post7|) (<= 2 main_~t~0)) [2020-07-07 14:00:55,740 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-07 14:00:55,741 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-07-07 14:00:55,741 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,741 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-07 14:00:55,741 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-07-07 14:00:55,741 INFO L264 CegarLoopResult]: At program point L48(lines 48 52) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 2 main_~t~0)) [2020-07-07 14:00:55,741 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (and (<= (+ |main_#t~post3| 1) main_~tagbuf_len~0) (<= 0 |main_#t~post3|) (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,741 INFO L264 CegarLoopResult]: At program point L32-1(line 32) the Hoare annotation is: (and (<= (+ |main_#t~post3| 1) main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 |main_#t~post3|) (<= 1 main_~t~0)) [2020-07-07 14:00:55,742 INFO L264 CegarLoopResult]: At program point L49(line 49) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-07 14:00:55,742 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-07-07 14:00:55,743 INFO L264 CegarLoopResult]: At program point L49-1(line 49) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-07-07 14:00:55,743 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,744 INFO L271 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: true [2020-07-07 14:00:55,744 INFO L271 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: true [2020-07-07 14:00:55,744 INFO L271 CegarLoopResult]: At program point L17-2(line 17) the Hoare annotation is: true [2020-07-07 14:00:55,744 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,745 INFO L264 CegarLoopResult]: At program point L59(line 59) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,745 INFO L271 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-07-07 14:00:55,745 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (<= 1 main_~tagbuf_len~0) [2020-07-07 14:00:55,745 INFO L264 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,745 INFO L264 CegarLoopResult]: At program point L43-1(lines 43 57) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,746 INFO L264 CegarLoopResult]: At program point L43-2(line 43) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,746 INFO L264 CegarLoopResult]: At program point L43-3(line 43) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,747 INFO L264 CegarLoopResult]: At program point L43-4(lines 43 57) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-07 14:00:55,747 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-07 14:00:55,747 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-07 14:00:55,747 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 14:00:55,747 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 14:00:55,748 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 14:00:55,748 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 14:00:55,748 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 14:00:55,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 02:00:55 BoogieIcfgContainer [2020-07-07 14:00:55,783 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 14:00:55,786 INFO L168 Benchmark]: Toolchain (without parser) took 12665.36 ms. Allocated memory was 141.0 MB in the beginning and 343.4 MB in the end (delta: 202.4 MB). Free memory was 104.0 MB in the beginning and 114.2 MB in the end (delta: -10.2 MB). Peak memory consumption was 192.4 MB. Max. memory is 7.1 GB. [2020-07-07 14:00:55,787 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-07 14:00:55,789 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.87 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 93.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-07 14:00:55,790 INFO L168 Benchmark]: Boogie Preprocessor took 121.14 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 93.7 MB in the beginning and 182.1 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-07-07 14:00:55,793 INFO L168 Benchmark]: RCFGBuilder took 430.59 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 163.7 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-07-07 14:00:55,799 INFO L168 Benchmark]: TraceAbstraction took 11854.84 ms. Allocated memory was 203.4 MB in the beginning and 343.4 MB in the end (delta: 140.0 MB). Free memory was 163.1 MB in the beginning and 114.2 MB in the end (delta: 48.8 MB). Peak memory consumption was 189.1 MB. Max. memory is 7.1 GB. [2020-07-07 14:00:55,802 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.87 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 93.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.14 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 93.7 MB in the beginning and 182.1 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.59 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 163.7 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11854.84 ms. Allocated memory was 203.4 MB in the beginning and 343.4 MB in the end (delta: 140.0 MB). Free memory was 163.1 MB in the beginning and 114.2 MB in the end (delta: 48.8 MB). Peak memory consumption was 189.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 21]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 0 <= t - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 1 <= t - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 0 == \old(cond) || !(0 == cond) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.8s, OverallIterations: 25, TraceHistogramMax: 10, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2053 SDtfs, 888 SDslu, 10849 SDs, 0 SdLazy, 3941 SolverSat, 357 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 694 GetRequests, 350 SyntacticMatches, 35 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=253occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 25 MinimizatonAttempts, 193 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 74 LocationsWithAnnotation, 494 PreInvPairs, 814 NumberOfFragments, 537 HoareAnnotationTreeSize, 494 FomulaSimplifications, 529911 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 74 FomulaSimplificationsInter, 1449 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...