/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-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:46:34,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:46:34,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:46:35,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:46:35,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:46:35,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:46:35,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:46:35,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:46:35,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:46:35,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:46:35,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:46:35,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:46:35,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:46:35,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:46:35,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:46:35,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:46:35,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:46:35,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:46:35,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:46:35,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:46:35,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:46:35,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:46:35,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:46:35,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:46:35,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 19:46:35,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 19:46:35,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 19:46:35,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 19:46:35,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 19:46:35,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 19:46:35,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 19:46:35,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 19:46:35,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 19:46:35,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 19:46:35,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 19:46:35,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 19:46:35,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 19:46:35,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 19:46:35,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:46:35,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:46:35,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:46:35,102 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 19:46:35,116 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:46:35,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:46:35,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:46:35,118 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:46:35,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:46:35,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:46:35,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:46:35,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:46:35,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:46:35,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:46:35,120 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:46:35,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:46:35,120 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:46:35,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:46:35,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:46:35,121 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:46:35,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:46:35,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:46:35,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:35,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:46:35,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:46:35,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:46:35,122 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:46:35,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:46:35,424 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:46:35,429 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:46:35,430 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:46:35,431 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:46:35,432 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-08-22 19:46:35,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436629f93/4d948fd1b7594849b42aebda85fa6aa1/FLAG28535cc29 [2020-08-22 19:46:36,039 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:46:36,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-08-22 19:46:36,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436629f93/4d948fd1b7594849b42aebda85fa6aa1/FLAG28535cc29 [2020-08-22 19:46:36,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436629f93/4d948fd1b7594849b42aebda85fa6aa1 [2020-08-22 19:46:36,441 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:46:36,443 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:46:36,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:36,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:46:36,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:46:36,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:36" (1/1) ... [2020-08-22 19:46:36,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519ac57e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:36, skipping insertion in model container [2020-08-22 19:46:36,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:36" (1/1) ... [2020-08-22 19:46:36,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:46:36,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:46:36,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:36,748 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:46:36,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:36,896 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:46:36,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:36 WrapperNode [2020-08-22 19:46:36,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:36,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:46:36,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:46:36,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:46:36,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:36" (1/1) ... [2020-08-22 19:46:36,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:36" (1/1) ... [2020-08-22 19:46:36,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:36" (1/1) ... [2020-08-22 19:46:36,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:36" (1/1) ... [2020-08-22 19:46:36,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:36" (1/1) ... [2020-08-22 19:46:36,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:36" (1/1) ... [2020-08-22 19:46:36,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:36" (1/1) ... [2020-08-22 19:46:36,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:46:36,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:46:36,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:46:36,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:46:36,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:36" (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 19:46:37,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:46:37,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:46:37,007 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:46:37,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:46:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:46:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:46:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:46:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:46:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 19:46:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:46:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:46:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:46:37,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:46:37,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:46:37,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:46:37,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:46:37,415 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:46:37,416 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 19:46:37,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:37 BoogieIcfgContainer [2020-08-22 19:46:37,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:46:37,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:46:37,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:46:37,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:46:37,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:46:36" (1/3) ... [2020-08-22 19:46:37,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71470dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:37, skipping insertion in model container [2020-08-22 19:46:37,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:36" (2/3) ... [2020-08-22 19:46:37,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71470dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:37, skipping insertion in model container [2020-08-22 19:46:37,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:37" (3/3) ... [2020-08-22 19:46:37,446 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2020-08-22 19:46:37,457 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:46:37,468 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-08-22 19:46:37,481 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-08-22 19:46:37,504 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:46:37,504 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:46:37,504 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:46:37,504 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:46:37,505 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:46:37,505 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:46:37,505 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:46:37,505 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:46:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states. [2020-08-22 19:46:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 19:46:37,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:37,540 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 19:46:37,541 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:37,547 INFO L82 PathProgramCache]: Analyzing trace with hash 477414535, now seen corresponding path program 1 times [2020-08-22 19:46:37,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:37,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116280491] [2020-08-22 19:46:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:37,617 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:37,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:37,835 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 19:46:37,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116280491] [2020-08-22 19:46:37,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:37,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:37,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197054870] [2020-08-22 19:46:37,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:37,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:37,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:37,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:37,867 INFO L87 Difference]: Start difference. First operand 103 states. Second operand 4 states. [2020-08-22 19:46:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:38,276 INFO L93 Difference]: Finished difference Result 210 states and 236 transitions. [2020-08-22 19:46:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:38,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-22 19:46:38,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:38,292 INFO L225 Difference]: With dead ends: 210 [2020-08-22 19:46:38,292 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 19:46:38,299 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 19:46:38,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 19:46:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-08-22 19:46:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 19:46:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-08-22 19:46:38,358 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 30 [2020-08-22 19:46:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:38,359 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-08-22 19:46:38,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-08-22 19:46:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 19:46:38,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:38,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:38,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:46:38,362 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash 572189094, now seen corresponding path program 1 times [2020-08-22 19:46:38,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:38,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832166539] [2020-08-22 19:46:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:38,367 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:38,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:38,502 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 19:46:38,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832166539] [2020-08-22 19:46:38,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:38,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:38,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586009126] [2020-08-22 19:46:38,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:38,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:38,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:38,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:38,506 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 4 states. [2020-08-22 19:46:38,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:38,772 INFO L93 Difference]: Finished difference Result 159 states and 167 transitions. [2020-08-22 19:46:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:38,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-22 19:46:38,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:38,775 INFO L225 Difference]: With dead ends: 159 [2020-08-22 19:46:38,775 INFO L226 Difference]: Without dead ends: 108 [2020-08-22 19:46:38,777 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 19:46:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-22 19:46:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-08-22 19:46:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 19:46:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-08-22 19:46:38,793 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 31 [2020-08-22 19:46:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:38,793 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-08-22 19:46:38,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-08-22 19:46:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 19:46:38,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:38,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:38,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:46:38,795 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:38,796 INFO L82 PathProgramCache]: Analyzing trace with hash -921386779, now seen corresponding path program 1 times [2020-08-22 19:46:38,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:38,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365614357] [2020-08-22 19:46:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:38,799 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:38,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:38,901 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 19:46:38,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365614357] [2020-08-22 19:46:38,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:38,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:46:38,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081974579] [2020-08-22 19:46:38,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:46:38,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:38,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:46:38,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:38,904 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 6 states. [2020-08-22 19:46:39,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:39,126 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-08-22 19:46:39,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:46:39,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-08-22 19:46:39,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:39,128 INFO L225 Difference]: With dead ends: 93 [2020-08-22 19:46:39,128 INFO L226 Difference]: Without dead ends: 91 [2020-08-22 19:46:39,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:46:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-22 19:46:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-08-22 19:46:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 19:46:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-08-22 19:46:39,142 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 31 [2020-08-22 19:46:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:39,143 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-08-22 19:46:39,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:46:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-08-22 19:46:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 19:46:39,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:39,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:39,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:46:39,145 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash -223412704, now seen corresponding path program 1 times [2020-08-22 19:46:39,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:39,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309784373] [2020-08-22 19:46:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:39,149 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:39,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:39,252 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 19:46:39,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309784373] [2020-08-22 19:46:39,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:39,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:39,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876004515] [2020-08-22 19:46:39,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:39,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:39,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:39,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:39,255 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 4 states. [2020-08-22 19:46:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:39,405 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2020-08-22 19:46:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:39,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-08-22 19:46:39,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:39,407 INFO L225 Difference]: With dead ends: 101 [2020-08-22 19:46:39,408 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 19:46:39,408 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 19:46:39,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 19:46:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-08-22 19:46:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 19:46:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-08-22 19:46:39,422 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 33 [2020-08-22 19:46:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:39,422 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-08-22 19:46:39,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-08-22 19:46:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 19:46:39,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:39,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:39,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:46:39,425 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:39,426 INFO L82 PathProgramCache]: Analyzing trace with hash 276122014, now seen corresponding path program 1 times [2020-08-22 19:46:39,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:39,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452245695] [2020-08-22 19:46:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:39,429 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:39,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:39,609 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 19:46:39,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452245695] [2020-08-22 19:46:39,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:39,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:46:39,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025837315] [2020-08-22 19:46:39,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:46:39,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:39,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:46:39,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:39,613 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 6 states. [2020-08-22 19:46:39,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:39,920 INFO L93 Difference]: Finished difference Result 181 states and 189 transitions. [2020-08-22 19:46:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:46:39,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-08-22 19:46:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:39,922 INFO L225 Difference]: With dead ends: 181 [2020-08-22 19:46:39,922 INFO L226 Difference]: Without dead ends: 139 [2020-08-22 19:46:39,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-22 19:46:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2020-08-22 19:46:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 19:46:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-08-22 19:46:39,940 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 52 [2020-08-22 19:46:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:39,940 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-08-22 19:46:39,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:46:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-08-22 19:46:39,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 19:46:39,942 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:39,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:39,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:46:39,943 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:39,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:39,943 INFO L82 PathProgramCache]: Analyzing trace with hash -94524522, now seen corresponding path program 1 times [2020-08-22 19:46:39,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:39,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072050607] [2020-08-22 19:46:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:39,946 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:40,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:40,072 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 19:46:40,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072050607] [2020-08-22 19:46:40,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:40,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:46:40,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468442535] [2020-08-22 19:46:40,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:46:40,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:40,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:46:40,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:46:40,078 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 9 states. [2020-08-22 19:46:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:40,469 INFO L93 Difference]: Finished difference Result 157 states and 165 transitions. [2020-08-22 19:46:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:46:40,469 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-08-22 19:46:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:40,471 INFO L225 Difference]: With dead ends: 157 [2020-08-22 19:46:40,471 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 19:46:40,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:46:40,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 19:46:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 92. [2020-08-22 19:46:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-22 19:46:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-08-22 19:46:40,501 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 53 [2020-08-22 19:46:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:40,502 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-08-22 19:46:40,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:46:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-08-22 19:46:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 19:46:40,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:40,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:40,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:46:40,504 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash 893991191, now seen corresponding path program 1 times [2020-08-22 19:46:40,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:40,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536783599] [2020-08-22 19:46:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:40,507 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:40,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:40,653 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 19:46:40,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536783599] [2020-08-22 19:46:40,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:40,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:46:40,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169081775] [2020-08-22 19:46:40,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:46:40,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:46:40,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:40,657 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 6 states. [2020-08-22 19:46:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:47,211 INFO L93 Difference]: Finished difference Result 153 states and 160 transitions. [2020-08-22 19:46:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:46:47,211 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-08-22 19:46:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:47,213 INFO L225 Difference]: With dead ends: 153 [2020-08-22 19:46:47,213 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 19:46:47,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:46:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 19:46:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2020-08-22 19:46:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-22 19:46:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-08-22 19:46:47,232 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 53 [2020-08-22 19:46:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:47,233 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-08-22 19:46:47,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:46:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-08-22 19:46:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 19:46:47,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:47,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:47,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:46:47,234 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:47,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:47,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2013372873, now seen corresponding path program 1 times [2020-08-22 19:46:47,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:47,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86229410] [2020-08-22 19:46:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:47,237 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:47,994 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 36 [2020-08-22 19:46:48,232 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 41 [2020-08-22 19:46:48,544 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-08-22 19:46:48,753 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-08-22 19:46:48,962 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-08-22 19:46:49,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:49,261 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 19:46:49,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86229410] [2020-08-22 19:46:49,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:49,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 19:46:49,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024371838] [2020-08-22 19:46:49,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 19:46:49,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 19:46:49,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:46:49,265 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 17 states. [2020-08-22 19:46:52,424 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-08-22 19:46:52,590 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2020-08-22 19:46:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:55,277 INFO L93 Difference]: Finished difference Result 147 states and 153 transitions. [2020-08-22 19:46:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 19:46:55,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-08-22 19:46:55,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:55,280 INFO L225 Difference]: With dead ends: 147 [2020-08-22 19:46:55,280 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 19:46:55,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2020-08-22 19:46:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 19:46:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2020-08-22 19:46:55,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 19:46:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-08-22 19:46:55,300 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 55 [2020-08-22 19:46:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:55,300 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-08-22 19:46:55,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 19:46:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-08-22 19:46:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 19:46:55,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:55,302 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 19:46:55,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:46:55,302 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:55,303 INFO L82 PathProgramCache]: Analyzing trace with hash 511170824, now seen corresponding path program 1 times [2020-08-22 19:46:55,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:55,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909668573] [2020-08-22 19:46:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:55,341 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:55,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:55,732 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 19:46:55,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909668573] [2020-08-22 19:46:55,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:55,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:46:55,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707738528] [2020-08-22 19:46:55,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:46:55,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:55,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:46:55,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:46:55,735 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 9 states. [2020-08-22 19:47:00,319 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-08-22 19:47:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:07,192 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2020-08-22 19:47:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:47:07,193 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-08-22 19:47:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:07,194 INFO L225 Difference]: With dead ends: 134 [2020-08-22 19:47:07,194 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 19:47:07,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:47:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 19:47:07,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-08-22 19:47:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 19:47:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-08-22 19:47:07,216 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 69 [2020-08-22 19:47:07,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:07,216 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-08-22 19:47:07,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:47:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-08-22 19:47:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 19:47:07,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:07,217 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:07,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:47:07,218 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:07,218 INFO L82 PathProgramCache]: Analyzing trace with hash -177457415, now seen corresponding path program 1 times [2020-08-22 19:47:07,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:07,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951713747] [2020-08-22 19:47:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:07,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:47:07,240 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 19:47:07,245 INFO L168 Benchmark]: Toolchain (without parser) took 30802.22 ms. Allocated memory was 140.0 MB in the beginning and 289.9 MB in the end (delta: 149.9 MB). Free memory was 103.1 MB in the beginning and 212.7 MB in the end (delta: -109.5 MB). Peak memory consumption was 40.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:07,246 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:47:07,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 452.80 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 102.9 MB in the beginning and 182.0 MB in the end (delta: -79.1 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:07,252 INFO L168 Benchmark]: Boogie Preprocessor took 41.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 180.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:07,254 INFO L168 Benchmark]: RCFGBuilder took 488.44 ms. Allocated memory is still 203.9 MB. Free memory was 180.1 MB in the beginning and 156.4 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:07,257 INFO L168 Benchmark]: TraceAbstraction took 29812.75 ms. Allocated memory was 203.9 MB in the beginning and 289.9 MB in the end (delta: 86.0 MB). Free memory was 155.8 MB in the beginning and 212.7 MB in the end (delta: -56.9 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:07,267 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 452.80 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 102.9 MB in the beginning and 182.0 MB in the end (delta: -79.1 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 180.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 488.44 ms. Allocated memory is still 203.9 MB. Free memory was 180.1 MB in the beginning and 156.4 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29812.75 ms. Allocated memory was 203.9 MB in the beginning and 289.9 MB in the end (delta: 86.0 MB). Free memory was 155.8 MB in the beginning and 212.7 MB in the end (delta: -56.9 MB). Peak memory consumption was 29.1 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...