/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-with-pointer/simple-recursive.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:10:56,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:10:56,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:10:56,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:10:56,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:10:56,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:10:56,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:10:56,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:10:56,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:10:57,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:10:57,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:10:57,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:10:57,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:10:57,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:10:57,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:10:57,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:10:57,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:10:57,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:10:57,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:10:57,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:10:57,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:10:57,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:10:57,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:10:57,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:10:57,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:10:57,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:10:57,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:10:57,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:10:57,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:10:57,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:10:57,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:10:57,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:10:57,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:10:57,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:10:57,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:10:57,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:10:57,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:10:57,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:10:57,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:10:57,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:10:57,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:10:57,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:10:57,048 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:10:57,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:10:57,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:10:57,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:10:57,050 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:10:57,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:10:57,051 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:10:57,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:10:57,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:10:57,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:10:57,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:10:57,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:10:57,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:10:57,052 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:10:57,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:10:57,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:10:57,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:10:57,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:10:57,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:10:57,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:10:57,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:10:57,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:10:57,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:10:57,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:10:57,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:10:57,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:10:57,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:10:57,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:10:57,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:10:57,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:10:57,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:10:57,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:10:57,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:10:57,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:10:57,390 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:10:57,391 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-with-pointer/simple-recursive.c [2020-07-20 17:10:57,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e284e02ef/bb18c1cfa3cc4c349eef33bcc4336b98/FLAGe0454e14d [2020-07-20 17:10:58,095 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:10:58,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-with-pointer/simple-recursive.c [2020-07-20 17:10:58,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e284e02ef/bb18c1cfa3cc4c349eef33bcc4336b98/FLAGe0454e14d [2020-07-20 17:10:58,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e284e02ef/bb18c1cfa3cc4c349eef33bcc4336b98 [2020-07-20 17:10:58,437 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:10:58,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:10:58,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:10:58,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:10:58,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:10:58,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:10:58" (1/1) ... [2020-07-20 17:10:58,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a5aca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:10:58, skipping insertion in model container [2020-07-20 17:10:58,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:10:58" (1/1) ... [2020-07-20 17:10:58,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:10:58,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:10:58,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:10:58,679 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:10:58,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:10:58,718 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:10:58,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:10:58 WrapperNode [2020-07-20 17:10:58,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:10:58,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:10:58,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:10:58,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:10:58,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:10:58" (1/1) ... [2020-07-20 17:10:58,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:10:58" (1/1) ... [2020-07-20 17:10:58,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:10:58" (1/1) ... [2020-07-20 17:10:58,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:10:58" (1/1) ... [2020-07-20 17:10:58,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:10:58" (1/1) ... [2020-07-20 17:10:58,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:10:58" (1/1) ... [2020-07-20 17:10:58,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:10:58" (1/1) ... [2020-07-20 17:10:58,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:10:58,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:10:58,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:10:58,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:10:58,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:10:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:10:58,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:10:58,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:10:58,935 INFO L138 BoogieDeclarations]: Found implementation of procedure plus [2020-07-20 17:10:58,935 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-07-20 17:10:58,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:10:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:10:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-07-20 17:10:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure plus [2020-07-20 17:10:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:10:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:10:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:10:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:10:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 17:10:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:10:58,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:10:58,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:10:59,233 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:10:59,234 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 17:10:59,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:10:59 BoogieIcfgContainer [2020-07-20 17:10:59,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:10:59,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:10:59,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:10:59,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:10:59,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:10:58" (1/3) ... [2020-07-20 17:10:59,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9fc46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:10:59, skipping insertion in model container [2020-07-20 17:10:59,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:10:58" (2/3) ... [2020-07-20 17:10:59,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9fc46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:10:59, skipping insertion in model container [2020-07-20 17:10:59,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:10:59" (3/3) ... [2020-07-20 17:10:59,250 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-recursive.c [2020-07-20 17:10:59,263 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:10:59,272 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:10:59,292 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:10:59,333 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:10:59,333 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:10:59,334 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:10:59,334 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:10:59,336 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:10:59,337 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:10:59,337 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:10:59,337 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:10:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 17:10:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 17:10:59,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:10:59,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:10:59,366 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:10:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:10:59,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1703201428, now seen corresponding path program 1 times [2020-07-20 17:10:59,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:10:59,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215968926] [2020-07-20 17:10:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:10:59,499 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:10:59,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:10:59,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 17:10:59,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:10:59,580 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 17:10:59,581 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:10:59,595 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:10:59,596 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:10:59,596 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 17:10:59,663 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 17:10:59,665 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:10:59,670 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:10:59,671 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:10:59,672 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 17:10:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:10:59,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:10:59,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215968926] [2020-07-20 17:10:59,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:10:59,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:10:59,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572021566] [2020-07-20 17:10:59,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:10:59,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:10:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:10:59,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:10:59,726 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 17:10:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:10:59,831 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-07-20 17:10:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:10:59,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-20 17:10:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:10:59,847 INFO L225 Difference]: With dead ends: 39 [2020-07-20 17:10:59,847 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 17:10:59,852 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 [2020-07-20 17:10:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 17:10:59,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-07-20 17:10:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 17:10:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 17:10:59,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-07-20 17:10:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:10:59,904 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 17:10:59,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:10:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 17:10:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 17:10:59,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:10:59,906 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:11:00,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:11:00,122 INFO L427 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:11:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:11:00,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1207469216, now seen corresponding path program 1 times [2020-07-20 17:11:00,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:11:00,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873424299] [2020-07-20 17:11:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:11:00,226 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:11:00,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:11:00,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 17:11:00,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:11:00,248 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 17:11:00,249 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:00,254 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:00,255 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:00,256 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 17:11:00,336 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:00,338 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:00,344 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:00,346 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:00,347 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:00,410 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 17:11:00,412 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:00,419 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:00,420 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:00,421 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 17:11:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:11:00,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:11:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:11:00,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873424299] [2020-07-20 17:11:00,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:11:00,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-20 17:11:00,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711439144] [2020-07-20 17:11:00,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 17:11:00,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:11:00,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 17:11:00,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-07-20 17:11:00,641 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2020-07-20 17:11:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:11:00,900 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 17:11:00,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 17:11:00,901 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2020-07-20 17:11:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:11:00,902 INFO L225 Difference]: With dead ends: 31 [2020-07-20 17:11:00,903 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 17:11:00,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-20 17:11:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 17:11:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-20 17:11:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 17:11:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 17:11:00,912 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 16 [2020-07-20 17:11:00,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:11:00,913 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 17:11:00,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 17:11:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 17:11:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 17:11:00,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:11:00,915 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:11:01,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:11:01,116 INFO L427 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:11:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:11:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1116654880, now seen corresponding path program 2 times [2020-07-20 17:11:01,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:11:01,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351175398] [2020-07-20 17:11:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:11:01,185 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:11:01,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:11:01,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 76 conjunts are in the unsatisfiable core [2020-07-20 17:11:01,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:11:01,199 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 17:11:01,200 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:01,202 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:01,203 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:01,203 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 17:11:01,244 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:01,246 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:01,249 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:01,250 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:01,250 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:01,312 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:01,313 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:01,316 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:01,317 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:01,317 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:01,396 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:01,397 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:01,400 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:01,401 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:01,401 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:01,456 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 17:11:01,458 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:01,460 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:01,461 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:01,461 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 17:11:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:11:01,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:11:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:11:02,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351175398] [2020-07-20 17:11:02,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:11:02,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-07-20 17:11:02,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870108287] [2020-07-20 17:11:02,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 17:11:02,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:11:02,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 17:11:02,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2020-07-20 17:11:02,009 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 32 states. [2020-07-20 17:11:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:11:02,727 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-07-20 17:11:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 17:11:02,727 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 26 [2020-07-20 17:11:02,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:11:02,729 INFO L225 Difference]: With dead ends: 51 [2020-07-20 17:11:02,729 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 17:11:02,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=332, Invalid=2118, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 17:11:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 17:11:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-07-20 17:11:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 17:11:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-07-20 17:11:02,743 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 26 [2020-07-20 17:11:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:11:02,743 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-07-20 17:11:02,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 17:11:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-07-20 17:11:02,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 17:11:02,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:11:02,746 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:11:02,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:11:02,960 INFO L427 AbstractCegarLoop]: === Iteration 4 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:11:02,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:11:02,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1667333664, now seen corresponding path program 3 times [2020-07-20 17:11:02,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:11:02,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616353948] [2020-07-20 17:11:02,962 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:11:03,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:11:03,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:11:03,130 WARN L261 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 160 conjunts are in the unsatisfiable core [2020-07-20 17:11:03,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:11:03,145 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 17:11:03,146 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,149 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:03,150 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,150 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 17:11:03,188 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:03,190 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,192 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:03,192 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,193 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:03,272 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:03,273 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,276 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:03,276 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:03,363 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:03,364 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,368 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:03,369 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,369 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:03,500 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:03,501 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,503 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:03,503 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,504 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:03,617 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:03,618 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,623 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:03,624 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,624 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:03,758 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:03,760 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,763 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:03,764 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,764 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:03,918 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:03,919 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,923 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:03,923 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:03,924 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:04,015 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 17:11:04,016 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:04,026 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:04,026 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:04,027 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 17:11:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:11:04,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:11:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:11:05,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616353948] [2020-07-20 17:11:05,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:11:05,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2020-07-20 17:11:05,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037370536] [2020-07-20 17:11:05,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-20 17:11:05,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:11:05,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-20 17:11:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=3648, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 17:11:05,628 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 64 states. [2020-07-20 17:11:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:11:07,145 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-07-20 17:11:07,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-20 17:11:07,151 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 46 [2020-07-20 17:11:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:11:07,153 INFO L225 Difference]: With dead ends: 66 [2020-07-20 17:11:07,153 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 17:11:07,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=811, Invalid=7379, Unknown=0, NotChecked=0, Total=8190 [2020-07-20 17:11:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 17:11:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-07-20 17:11:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 17:11:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-07-20 17:11:07,180 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 46 [2020-07-20 17:11:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:11:07,181 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-07-20 17:11:07,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-20 17:11:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-07-20 17:11:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 17:11:07,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:11:07,187 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:11:07,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:11:07,396 INFO L427 AbstractCegarLoop]: === Iteration 5 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:11:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:11:07,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1424289772, now seen corresponding path program 4 times [2020-07-20 17:11:07,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:11:07,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611577074] [2020-07-20 17:11:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:11:07,731 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:11:07,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:11:07,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 226 conjunts are in the unsatisfiable core [2020-07-20 17:11:07,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:11:07,753 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 17:11:07,753 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:07,756 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:07,756 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:07,756 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 17:11:07,784 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:07,785 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:07,787 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:07,788 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:07,788 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:07,832 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:07,833 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:07,835 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:07,835 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:07,836 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:07,907 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:07,908 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:07,911 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:07,912 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:07,912 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:07,999 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:07,999 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,002 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:08,003 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:08,113 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:08,114 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,116 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:08,117 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,117 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:08,243 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:08,244 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,246 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:08,246 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,247 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:08,391 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:08,392 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,396 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:08,397 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,397 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:08,564 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:08,565 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,568 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:08,568 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,568 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:08,771 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:08,772 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,775 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:08,775 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:08,776 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:09,004 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:09,005 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:09,010 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:09,010 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:09,010 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:09,196 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-07-20 17:11:09,197 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:09,207 INFO L624 ElimStorePlain]: treesize reduction 4, result has 42.9 percent of original size [2020-07-20 17:11:09,207 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:09,208 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2020-07-20 17:11:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:11:09,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:11:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:11:12,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611577074] [2020-07-20 17:11:12,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:11:12,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 89 [2020-07-20 17:11:12,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887694796] [2020-07-20 17:11:12,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-07-20 17:11:12,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:11:12,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-07-20 17:11:12,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=7234, Unknown=0, NotChecked=0, Total=7832 [2020-07-20 17:11:12,555 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 89 states. [2020-07-20 17:11:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:11:15,277 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-07-20 17:11:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-20 17:11:15,278 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 61 [2020-07-20 17:11:15,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:11:15,280 INFO L225 Difference]: With dead ends: 71 [2020-07-20 17:11:15,281 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 17:11:15,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1092, Invalid=13428, Unknown=0, NotChecked=0, Total=14520 [2020-07-20 17:11:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 17:11:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-07-20 17:11:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 17:11:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-07-20 17:11:15,313 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-07-20 17:11:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:11:15,313 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-07-20 17:11:15,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-07-20 17:11:15,314 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-07-20 17:11:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-20 17:11:15,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:11:15,317 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:11:15,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:11:15,527 INFO L427 AbstractCegarLoop]: === Iteration 6 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:11:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:11:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1460556000, now seen corresponding path program 5 times [2020-07-20 17:11:15,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:11:15,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095912042] [2020-07-20 17:11:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:11:15,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:11:15,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:11:15,886 WARN L261 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 223 conjunts are in the unsatisfiable core [2020-07-20 17:11:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:11:15,903 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 17:11:15,904 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:15,905 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:15,906 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:15,906 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 17:11:15,934 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:15,935 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:15,938 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:15,938 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:15,938 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:15,992 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:15,992 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:15,995 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:15,996 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:15,996 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:16,068 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:16,069 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,072 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:16,072 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,073 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:16,157 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:16,158 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,160 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:16,160 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,160 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:16,278 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:16,280 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,288 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:16,289 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:16,436 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:16,437 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,439 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:16,439 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,439 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:16,585 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:16,586 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,589 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:16,589 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,589 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:16,766 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:16,767 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,769 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:16,770 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,770 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:16,957 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:16,958 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,960 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:16,961 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:16,961 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:17,163 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 17:11:17,164 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:17,167 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:17,167 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:17,168 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-20 17:11:17,285 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 17:11:17,285 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:11:17,287 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:11:17,287 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:11:17,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 17:11:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 52 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:11:17,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:11:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 287 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:11:20,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095912042] [2020-07-20 17:11:20,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:11:20,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 87 [2020-07-20 17:11:20,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712306836] [2020-07-20 17:11:20,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-07-20 17:11:20,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:11:20,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-07-20 17:11:20,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=6889, Unknown=0, NotChecked=0, Total=7482 [2020-07-20 17:11:20,480 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 87 states. [2020-07-20 17:11:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:11:22,638 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-07-20 17:11:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-20 17:11:22,639 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 66 [2020-07-20 17:11:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:11:22,641 INFO L225 Difference]: With dead ends: 67 [2020-07-20 17:11:22,641 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:11:22,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=926, Invalid=10630, Unknown=0, NotChecked=0, Total=11556 [2020-07-20 17:11:22,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:11:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:11:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:11:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:11:22,647 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-07-20 17:11:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:11:22,647 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:11:22,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-07-20 17:11:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:11:22,648 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:11:22,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:11:22,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:11:23,299 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-07-20 17:11:23,544 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 86 [2020-07-20 17:11:23,724 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-07-20 17:11:23,896 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-07-20 17:11:23,901 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:11:23,901 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:11:23,902 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:11:23,902 INFO L268 CegarLoopResult]: For program point fooEXIT(lines 9 18) no Hoare annotation was computed. [2020-07-20 17:11:23,902 INFO L264 CegarLoopResult]: At program point fooENTRY(lines 9 18) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| |foo_#in~p.base|) |foo_#in~p.offset|)) (.cse1 (select (select |old(#memory_int)| |foo_#in~p.base|) |foo_#in~p.offset|))) (and (or (= 12 .cse0) (not (= 12 .cse1))) (or (not (= 15 .cse1)) (= 15 .cse0)) (or (not (= 16 .cse1)) (= 16 .cse0)) (or (not (= 20 .cse1)) (= 20 .cse0)) (or (not (= 13 .cse1)) (= 13 .cse0)) (or (not (= 10 .cse1)) (= 10 .cse0)) (or (= 17 .cse0) (not (= 17 .cse1))) (or (not (= 19 .cse1)) (= 19 .cse0)) (or (not (= 18 .cse1)) (= 18 .cse0)) (or (= 11 .cse0) (not (= 11 .cse1))) (or (= 14 .cse0) (not (= 14 .cse1))))) [2020-07-20 17:11:23,903 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 17:11:23,903 INFO L268 CegarLoopResult]: For program point fooErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-20 17:11:23,903 INFO L268 CegarLoopResult]: For program point L12(lines 12 17) no Hoare annotation was computed. [2020-07-20 17:11:23,904 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (let ((.cse1 (select (select |#memory_int| foo_~p.base) foo_~p.offset)) (.cse2 (select (select |#memory_int| |foo_#in~p.base|) |foo_#in~p.offset|)) (.cse0 (select (select |old(#memory_int)| |foo_#in~p.base|) |foo_#in~p.offset|))) (and (not (= 20 .cse0)) (or (not (= 15 .cse0)) (and (= 15 .cse1) (= 15 .cse2))) (or (not (= 19 .cse0)) (and (= 19 .cse1) (= 19 .cse2))) (or (not (= 14 .cse0)) (and (= 14 .cse2) (= 14 .cse1))) (or (not (= 17 .cse0)) (and (= 17 .cse1) (= 17 .cse2))) (or (not (= 11 .cse0)) (and (= 11 .cse2) (= 11 .cse1))) (or (not (= 18 .cse0)) (and (= 18 .cse1) (= 18 .cse2))) (or (and (= 12 .cse2) (= 12 .cse1)) (not (= 12 .cse0))) (or (not (= 10 .cse0)) (and (= 10 .cse1) (= 10 .cse2))) (or (not (= 13 .cse0)) (and (= 13 .cse2) (= 13 .cse1))) (or (and (= 16 .cse1) (= 16 .cse2)) (not (= 16 .cse0))))) [2020-07-20 17:11:23,904 INFO L268 CegarLoopResult]: For program point L10(lines 10 17) no Hoare annotation was computed. [2020-07-20 17:11:23,904 INFO L268 CegarLoopResult]: For program point L10-1(lines 9 18) no Hoare annotation was computed. [2020-07-20 17:11:23,904 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:11:23,905 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:11:23,905 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:11:23,905 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:11:23,905 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 20 26) the Hoare annotation is: true [2020-07-20 17:11:23,905 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 20 26) no Hoare annotation was computed. [2020-07-20 17:11:23,905 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (= 10 (select (select |#memory_int| main_~p~0.base) main_~p~0.offset)) [2020-07-20 17:11:23,905 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 20 26) no Hoare annotation was computed. [2020-07-20 17:11:23,906 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-20 17:11:23,906 INFO L268 CegarLoopResult]: For program point plusFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-20 17:11:23,906 INFO L264 CegarLoopResult]: At program point plusENTRY(lines 4 7) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int)| |plus_#in~p.base|) |plus_#in~p.offset|)) (.cse1 (select (select |#memory_int| |plus_#in~p.base|) |plus_#in~p.offset|))) (and (or (not (= 12 .cse0)) (= 12 .cse1)) (or (not (= 11 .cse0)) (= 11 .cse1)) (or (= 17 .cse1) (not (= 17 .cse0))) (or (= 16 .cse1) (not (= 16 .cse0))) (or (not (= 10 .cse0)) (= 10 .cse1)) (or (not (= 13 .cse0)) (= 13 .cse1)) (or (not (= 19 .cse0)) (= 19 .cse1)) (or (= 14 .cse1) (not (= 14 .cse0))) (or (= 15 .cse1) (not (= 15 .cse0))) (or (not (= 18 .cse0)) (= 18 .cse1)))) [2020-07-20 17:11:23,906 INFO L268 CegarLoopResult]: For program point plusEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-20 17:11:23,906 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (let ((.cse2 (select (select |old(#memory_int)| |plus_#in~p.base|) |plus_#in~p.offset|)) (.cse1 (select (select |#memory_int| |plus_#in~p.base|) |plus_#in~p.offset|)) (.cse0 (select (select |#memory_int| plus_~p.base) plus_~p.offset))) (and (or (and (= 15 .cse0) (= 15 .cse1)) (not (= 14 .cse2))) (or (and (= 18 .cse0) (= 18 .cse1)) (not (= 17 .cse2))) (or (not (= 18 .cse2)) (and (= 19 .cse0) (= 19 .cse1))) (or (and (< 18 .cse1) (= 20 .cse0)) (not (= 19 .cse2))) (or (and (= 16 .cse1) (= 16 .cse0)) (not (= 15 .cse2))) (or (not (= 13 .cse2)) (and (= 14 .cse0) (= 14 .cse1))) (or (not (= 11 .cse2)) (and (= 12 .cse0) (= 12 .cse1))) (or (and (= 11 .cse1) (= 11 .cse0)) (not (= 10 .cse2))) (or (and (= 17 .cse1) (= 17 .cse0)) (not (= 16 .cse2))) (or (not (= 12 .cse2)) (and (= 13 .cse1) (= 13 .cse0))))) [2020-07-20 17:11:23,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:11:23 BoogieIcfgContainer [2020-07-20 17:11:23,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:11:23,915 INFO L168 Benchmark]: Toolchain (without parser) took 25476.21 ms. Allocated memory was 136.3 MB in the beginning and 433.1 MB in the end (delta: 296.7 MB). Free memory was 100.1 MB in the beginning and 244.6 MB in the end (delta: -144.5 MB). Peak memory consumption was 152.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:11:23,915 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:11:23,916 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.68 ms. Allocated memory is still 136.3 MB. Free memory was 99.6 MB in the beginning and 90.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:11:23,916 INFO L168 Benchmark]: Boogie Preprocessor took 130.81 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 90.1 MB in the beginning and 178.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:11:23,917 INFO L168 Benchmark]: RCFGBuilder took 388.11 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 163.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:11:23,917 INFO L168 Benchmark]: TraceAbstraction took 24671.68 ms. Allocated memory was 200.3 MB in the beginning and 433.1 MB in the end (delta: 232.8 MB). Free memory was 163.5 MB in the beginning and 244.6 MB in the end (delta: -81.1 MB). Peak memory consumption was 151.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:11:23,919 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.68 ms. Allocated memory is still 136.3 MB. Free memory was 99.6 MB in the beginning and 90.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.81 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 90.1 MB in the beginning and 178.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 388.11 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 163.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24671.68 ms. Allocated memory was 200.3 MB in the beginning and 433.1 MB in the end (delta: 232.8 MB). Free memory was 163.5 MB in the beginning and 244.6 MB in the end (delta: -81.1 MB). Peak memory consumption was 151.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.5s, OverallIterations: 6, TraceHistogramMax: 12, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 129 SDslu, 1120 SDs, 0 SdLazy, 3998 SolverSat, 198 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 540 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5573 ImplicationChecksByTransitivity, 16.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 51 PreInvPairs, 51 NumberOfFragments, 839 HoareAnnotationTreeSize, 51 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 435 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 226 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 430 ConstructedInterpolants, 0 QuantifiedInterpolants, 153220 SizeOfPredicates, 222 NumberOfNonLiveVariables, 1160 ConjunctsInSsa, 732 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 339/1368 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...