/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/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:44:12,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:44:12,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:44:12,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:44:12,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:44:12,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:44:12,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:44:12,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:44:12,231 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:44:12,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:44:12,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:44:12,234 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:44:12,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:44:12,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:44:12,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:44:12,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:44:12,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:44:12,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:44:12,236 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:44:12,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:44:12,237 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:44:12,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:44:12,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:44:12,238 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:44:12,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:44:12,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:44:12,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:44:12,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:44:12,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:44:12,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:44:12,239 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:44:12,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:44:12,655 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:44:12,659 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:44:12,661 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:44:12,662 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:44:12,663 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 19:44:12,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a5e51fd4/038933c5c4a2432aba98e85b58037ae6/FLAG4c2006666 [2020-08-22 19:44:13,277 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:44:13,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 19:44:13,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a5e51fd4/038933c5c4a2432aba98e85b58037ae6/FLAG4c2006666 [2020-08-22 19:44:13,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a5e51fd4/038933c5c4a2432aba98e85b58037ae6 [2020-08-22 19:44:13,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:44:13,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:44:13,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:44:13,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:44:13,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:44:13,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:44:13" (1/1) ... [2020-08-22 19:44:13,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154d87e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13, skipping insertion in model container [2020-08-22 19:44:13,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:44:13" (1/1) ... [2020-08-22 19:44:13,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:44:13,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:44:13,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:44:13,905 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:44:13,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:44:13,950 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:44:13,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13 WrapperNode [2020-08-22 19:44:13,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:44:13,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:44:13,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:44:13,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:44:14,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13" (1/1) ... [2020-08-22 19:44:14,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13" (1/1) ... [2020-08-22 19:44:14,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13" (1/1) ... [2020-08-22 19:44:14,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13" (1/1) ... [2020-08-22 19:44:14,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13" (1/1) ... [2020-08-22 19:44:14,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13" (1/1) ... [2020-08-22 19:44:14,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13" (1/1) ... [2020-08-22 19:44:14,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:44:14,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:44:14,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:44:14,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:44:14,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13" (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 [2020-08-22 19:44:14,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:44:14,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:44:14,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:44:14,187 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-22 19:44:14,188 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-22 19:44:14,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:44:14,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:44:14,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:44:14,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:44:14,189 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-22 19:44:14,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:44:14,190 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-22 19:44:14,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:44:14,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:44:14,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:44:14,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:44:14,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:44:14,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:44:14,693 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:44:14,693 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-22 19:44:14,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:44:14 BoogieIcfgContainer [2020-08-22 19:44:14,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:44:14,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:44:14,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:44:14,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:44:14,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:44:13" (1/3) ... [2020-08-22 19:44:14,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b794bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:44:14, skipping insertion in model container [2020-08-22 19:44:14,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:44:13" (2/3) ... [2020-08-22 19:44:14,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b794bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:44:14, skipping insertion in model container [2020-08-22 19:44:14,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:44:14" (3/3) ... [2020-08-22 19:44:14,711 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-22 19:44:14,724 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:44:14,735 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:44:14,753 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:44:14,783 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:44:14,783 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:44:14,783 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:44:14,784 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:44:14,785 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:44:14,786 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:44:14,786 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:44:14,786 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:44:14,810 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states. [2020-08-22 19:44:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 19:44:14,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:14,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:14,827 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:14,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1588916751, now seen corresponding path program 1 times [2020-08-22 19:44:14,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:14,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473961794] [2020-08-22 19:44:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:14,942 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:15,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:15,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473961794] [2020-08-22 19:44:15,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:15,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:44:15,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384912303] [2020-08-22 19:44:15,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:44:15,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:15,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:44:15,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:44:15,119 INFO L87 Difference]: Start difference. First operand 132 states. Second operand 3 states. [2020-08-22 19:44:15,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:15,467 INFO L93 Difference]: Finished difference Result 245 states and 295 transitions. [2020-08-22 19:44:15,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:44:15,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 19:44:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:15,483 INFO L225 Difference]: With dead ends: 245 [2020-08-22 19:44:15,484 INFO L226 Difference]: Without dead ends: 123 [2020-08-22 19:44:15,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:44:15,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-08-22 19:44:15,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-08-22 19:44:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 19:44:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2020-08-22 19:44:15,561 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 23 [2020-08-22 19:44:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:15,562 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2020-08-22 19:44:15,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:44:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2020-08-22 19:44:15,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 19:44:15,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:15,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:15,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:44:15,568 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:15,569 INFO L82 PathProgramCache]: Analyzing trace with hash -119454780, now seen corresponding path program 1 times [2020-08-22 19:44:15,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:15,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786376554] [2020-08-22 19:44:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:15,577 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:15,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:15,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786376554] [2020-08-22 19:44:15,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:15,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:44:15,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279711297] [2020-08-22 19:44:15,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:44:15,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:15,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:44:15,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:44:15,687 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 4 states. [2020-08-22 19:44:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:16,071 INFO L93 Difference]: Finished difference Result 303 states and 342 transitions. [2020-08-22 19:44:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:44:16,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-08-22 19:44:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:16,075 INFO L225 Difference]: With dead ends: 303 [2020-08-22 19:44:16,075 INFO L226 Difference]: Without dead ends: 199 [2020-08-22 19:44:16,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:44:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-08-22 19:44:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 124. [2020-08-22 19:44:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-22 19:44:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2020-08-22 19:44:16,101 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 23 [2020-08-22 19:44:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:16,101 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2020-08-22 19:44:16,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:44:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2020-08-22 19:44:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 19:44:16,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:16,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:16,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:44:16,103 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:16,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:16,104 INFO L82 PathProgramCache]: Analyzing trace with hash -395870253, now seen corresponding path program 1 times [2020-08-22 19:44:16,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:16,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877961957] [2020-08-22 19:44:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:16,134 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:16,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:16,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877961957] [2020-08-22 19:44:16,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:16,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:44:16,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455476922] [2020-08-22 19:44:16,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:44:16,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:16,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:44:16,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:44:16,233 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 6 states. [2020-08-22 19:44:16,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:16,707 INFO L93 Difference]: Finished difference Result 310 states and 349 transitions. [2020-08-22 19:44:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:44:16,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-08-22 19:44:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:16,717 INFO L225 Difference]: With dead ends: 310 [2020-08-22 19:44:16,717 INFO L226 Difference]: Without dead ends: 206 [2020-08-22 19:44:16,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:44:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-22 19:44:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 131. [2020-08-22 19:44:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 19:44:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2020-08-22 19:44:16,750 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 30 [2020-08-22 19:44:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:16,751 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2020-08-22 19:44:16,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:44:16,751 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2020-08-22 19:44:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 19:44:16,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:16,753 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:16,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:44:16,754 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:16,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1926718692, now seen corresponding path program 2 times [2020-08-22 19:44:16,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:16,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432867365] [2020-08-22 19:44:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:16,762 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:16,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:16,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432867365] [2020-08-22 19:44:16,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:16,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:44:16,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657299291] [2020-08-22 19:44:16,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:44:16,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:16,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:44:16,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:44:16,875 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand 8 states. [2020-08-22 19:44:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:17,389 INFO L93 Difference]: Finished difference Result 317 states and 356 transitions. [2020-08-22 19:44:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:44:17,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-08-22 19:44:17,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:17,393 INFO L225 Difference]: With dead ends: 317 [2020-08-22 19:44:17,393 INFO L226 Difference]: Without dead ends: 213 [2020-08-22 19:44:17,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:44:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-08-22 19:44:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 138. [2020-08-22 19:44:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 19:44:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 151 transitions. [2020-08-22 19:44:17,441 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 151 transitions. Word has length 37 [2020-08-22 19:44:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:17,443 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 151 transitions. [2020-08-22 19:44:17,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:44:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 151 transitions. [2020-08-22 19:44:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 19:44:17,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:17,445 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:17,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:44:17,448 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:17,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:17,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1889524403, now seen corresponding path program 3 times [2020-08-22 19:44:17,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:17,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198348577] [2020-08-22 19:44:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:17,459 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:17,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:17,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198348577] [2020-08-22 19:44:17,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:17,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:44:17,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55755148] [2020-08-22 19:44:17,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:44:17,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:17,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:44:17,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:44:17,574 INFO L87 Difference]: Start difference. First operand 138 states and 151 transitions. Second operand 5 states. [2020-08-22 19:44:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:17,807 INFO L93 Difference]: Finished difference Result 248 states and 276 transitions. [2020-08-22 19:44:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:44:17,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-08-22 19:44:17,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:17,811 INFO L225 Difference]: With dead ends: 248 [2020-08-22 19:44:17,811 INFO L226 Difference]: Without dead ends: 143 [2020-08-22 19:44:17,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:44:17,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-22 19:44:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2020-08-22 19:44:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 19:44:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2020-08-22 19:44:17,825 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 44 [2020-08-22 19:44:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:17,826 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2020-08-22 19:44:17,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:44:17,826 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2020-08-22 19:44:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 19:44:17,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:17,829 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:17,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:44:17,830 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:17,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:17,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1581132658, now seen corresponding path program 1 times [2020-08-22 19:44:17,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:17,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834372404] [2020-08-22 19:44:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:17,841 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:17,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:17,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 19:44:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:17,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 19:44:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:17,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834372404] [2020-08-22 19:44:17,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:17,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:44:17,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310266524] [2020-08-22 19:44:17,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:44:17,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:17,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:44:17,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:44:17,989 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand 11 states. [2020-08-22 19:44:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:18,541 INFO L93 Difference]: Finished difference Result 298 states and 331 transitions. [2020-08-22 19:44:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:44:18,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 80 [2020-08-22 19:44:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:18,544 INFO L225 Difference]: With dead ends: 298 [2020-08-22 19:44:18,544 INFO L226 Difference]: Without dead ends: 195 [2020-08-22 19:44:18,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-22 19:44:18,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-08-22 19:44:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 144. [2020-08-22 19:44:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 19:44:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2020-08-22 19:44:18,560 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 80 [2020-08-22 19:44:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:18,560 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2020-08-22 19:44:18,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:44:18,560 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2020-08-22 19:44:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 19:44:18,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:18,562 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:18,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:44:18,563 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:18,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2142538913, now seen corresponding path program 2 times [2020-08-22 19:44:18,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:18,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239231560] [2020-08-22 19:44:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:18,570 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:18,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:18,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 19:44:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:18,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 19:44:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:18,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239231560] [2020-08-22 19:44:18,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:18,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 19:44:18,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769776962] [2020-08-22 19:44:18,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 19:44:18,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:18,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 19:44:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:44:18,731 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand 13 states. [2020-08-22 19:44:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:19,297 INFO L93 Difference]: Finished difference Result 305 states and 338 transitions. [2020-08-22 19:44:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 19:44:19,298 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 87 [2020-08-22 19:44:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:19,300 INFO L225 Difference]: With dead ends: 305 [2020-08-22 19:44:19,300 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 19:44:19,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2020-08-22 19:44:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 19:44:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 151. [2020-08-22 19:44:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-08-22 19:44:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2020-08-22 19:44:19,316 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 87 [2020-08-22 19:44:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:19,317 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2020-08-22 19:44:19,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 19:44:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2020-08-22 19:44:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 19:44:19,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:19,319 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:19,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:44:19,320 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:19,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1372997778, now seen corresponding path program 3 times [2020-08-22 19:44:19,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:19,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153636052] [2020-08-22 19:44:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:19,327 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:19,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:19,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 19:44:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:19,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 19:44:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:19,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153636052] [2020-08-22 19:44:19,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:19,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 19:44:19,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021183317] [2020-08-22 19:44:19,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 19:44:19,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:19,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 19:44:19,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:44:19,497 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand 15 states. [2020-08-22 19:44:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:20,247 INFO L93 Difference]: Finished difference Result 312 states and 345 transitions. [2020-08-22 19:44:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 19:44:20,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 94 [2020-08-22 19:44:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:20,252 INFO L225 Difference]: With dead ends: 312 [2020-08-22 19:44:20,252 INFO L226 Difference]: Without dead ends: 209 [2020-08-22 19:44:20,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-08-22 19:44:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-08-22 19:44:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 158. [2020-08-22 19:44:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-08-22 19:44:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 170 transitions. [2020-08-22 19:44:20,271 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 170 transitions. Word has length 94 [2020-08-22 19:44:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:20,272 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 170 transitions. [2020-08-22 19:44:20,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 19:44:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 170 transitions. [2020-08-22 19:44:20,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 19:44:20,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:20,275 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:20,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:44:20,276 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1331129217, now seen corresponding path program 4 times [2020-08-22 19:44:20,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:20,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109947966] [2020-08-22 19:44:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:20,289 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:20,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:20,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 19:44:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:20,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 19:44:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:20,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109947966] [2020-08-22 19:44:20,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:20,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 19:44:20,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943335592] [2020-08-22 19:44:20,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 19:44:20,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:20,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 19:44:20,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:44:20,525 INFO L87 Difference]: Start difference. First operand 158 states and 170 transitions. Second operand 17 states. [2020-08-22 19:44:21,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:21,217 INFO L93 Difference]: Finished difference Result 319 states and 352 transitions. [2020-08-22 19:44:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 19:44:21,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-08-22 19:44:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:21,220 INFO L225 Difference]: With dead ends: 319 [2020-08-22 19:44:21,221 INFO L226 Difference]: Without dead ends: 216 [2020-08-22 19:44:21,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=669, Unknown=0, NotChecked=0, Total=930 [2020-08-22 19:44:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-22 19:44:21,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 165. [2020-08-22 19:44:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-08-22 19:44:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2020-08-22 19:44:21,240 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 101 [2020-08-22 19:44:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:21,241 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2020-08-22 19:44:21,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 19:44:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2020-08-22 19:44:21,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 19:44:21,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:21,243 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:21,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:44:21,244 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:21,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:21,244 INFO L82 PathProgramCache]: Analyzing trace with hash -837086642, now seen corresponding path program 5 times [2020-08-22 19:44:21,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:21,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425561965] [2020-08-22 19:44:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:21,252 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:44:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:21,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:44:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:21,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 19:44:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:21,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 19:44:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:44:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:44:21,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425561965] [2020-08-22 19:44:21,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:44:21,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:44:21,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053647052] [2020-08-22 19:44:21,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:44:21,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:44:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:44:21,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:44:21,341 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand 5 states. [2020-08-22 19:44:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:44:21,605 INFO L93 Difference]: Finished difference Result 298 states and 327 transitions. [2020-08-22 19:44:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:44:21,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-08-22 19:44:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:44:21,608 INFO L225 Difference]: With dead ends: 298 [2020-08-22 19:44:21,608 INFO L226 Difference]: Without dead ends: 207 [2020-08-22 19:44:21,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:44:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-08-22 19:44:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 166. [2020-08-22 19:44:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-08-22 19:44:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 178 transitions. [2020-08-22 19:44:21,623 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 178 transitions. Word has length 108 [2020-08-22 19:44:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:44:21,624 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 178 transitions. [2020-08-22 19:44:21,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:44:21,624 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 178 transitions. [2020-08-22 19:44:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 19:44:21,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:44:21,626 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:44:21,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:44:21,626 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:44:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:44:21,627 INFO L82 PathProgramCache]: Analyzing trace with hash -118705538, now seen corresponding path program 1 times [2020-08-22 19:44:21,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:44:21,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876953740] [2020-08-22 19:44:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:44:21,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:44:21,635 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:413) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:293) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 19:44:21,642 INFO L168 Benchmark]: Toolchain (without parser) took 7994.69 ms. Allocated memory was 147.3 MB in the beginning and 306.7 MB in the end (delta: 159.4 MB). Free memory was 104.5 MB in the beginning and 137.8 MB in the end (delta: -33.4 MB). Peak memory consumption was 126.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:21,643 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 147.3 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 19:44:21,643 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.60 ms. Allocated memory is still 147.3 MB. Free memory was 104.3 MB in the beginning and 93.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:21,644 INFO L168 Benchmark]: Boogie Preprocessor took 159.44 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.1 MB in the beginning and 180.3 MB in the end (delta: -87.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:21,645 INFO L168 Benchmark]: RCFGBuilder took 588.91 ms. Allocated memory is still 202.9 MB. Free memory was 179.6 MB in the beginning and 151.0 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:21,646 INFO L168 Benchmark]: TraceAbstraction took 6937.29 ms. Allocated memory was 202.9 MB in the beginning and 306.7 MB in the end (delta: 103.8 MB). Free memory was 150.3 MB in the beginning and 137.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 116.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:44:21,650 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 147.3 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.60 ms. Allocated memory is still 147.3 MB. Free memory was 104.3 MB in the beginning and 93.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 159.44 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.1 MB in the beginning and 180.3 MB in the end (delta: -87.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 588.91 ms. Allocated memory is still 202.9 MB. Free memory was 179.6 MB in the beginning and 151.0 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6937.29 ms. Allocated memory was 202.9 MB in the beginning and 306.7 MB in the end (delta: 103.8 MB). Free memory was 150.3 MB in the beginning and 137.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 116.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:413) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...