/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_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 [2020-07-21 13:31:08,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:31:08,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:31:08,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:31:08,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:31:08,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:31:08,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:31:08,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:31:08,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:31:08,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:31:08,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:31:08,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:31:08,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:31:08,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:31:08,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:31:08,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:31:08,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:31:08,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:31:08,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:31:08,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:31:08,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:31:08,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:31:08,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:31:08,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:31:08,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 13:31:08,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 13:31:08,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 13:31:08,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 13:31:08,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 13:31:08,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 13:31:08,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:31:08,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:31:08,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:31:08,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:31:08,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:31:08,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:31:08,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:31:08,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:31:08,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:31:08,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:31:08,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:31:08,922 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 [2020-07-21 13:31:08,942 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:31:08,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:31:08,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:31:08,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:31:08,945 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:31:08,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:31:08,945 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:31:08,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:31:08,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:31:08,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:31:08,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:31:08,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:31:08,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:31:08,947 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:31:08,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:31:08,947 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:31:08,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:31:08,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:31:08,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:31:08,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:31:08,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:31:08,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:31:08,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:31:08,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:31:08,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:31:08,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:31:08,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:31:08,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:31:08,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:31:08,951 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_FUNCTIONS 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 -> 2 [2020-07-21 13:31:09,334 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:31:09,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:31:09,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:31:09,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:31:09,363 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:31:09,364 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-with-pointer/simple-recursive.c [2020-07-21 13:31:09,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1076224c/e965af1458b244efbb723f8cd664b8ef/FLAG537e9ecdb [2020-07-21 13:31:10,175 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:31:10,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-with-pointer/simple-recursive.c [2020-07-21 13:31:10,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1076224c/e965af1458b244efbb723f8cd664b8ef/FLAG537e9ecdb [2020-07-21 13:31:10,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1076224c/e965af1458b244efbb723f8cd664b8ef [2020-07-21 13:31:10,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:31:10,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:31:10,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:31:10,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:31:10,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:31:10,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:31:10" (1/1) ... [2020-07-21 13:31:10,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf7033e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:10, skipping insertion in model container [2020-07-21 13:31:10,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:31:10" (1/1) ... [2020-07-21 13:31:10,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:31:10,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:31:10,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:31:10,883 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:31:10,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:31:10,929 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:31:10,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:10 WrapperNode [2020-07-21 13:31:10,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:31:10,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:31:10,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:31:10,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:31:11,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:10" (1/1) ... [2020-07-21 13:31:11,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:10" (1/1) ... [2020-07-21 13:31:11,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:10" (1/1) ... [2020-07-21 13:31:11,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:10" (1/1) ... [2020-07-21 13:31:11,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:10" (1/1) ... [2020-07-21 13:31:11,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:10" (1/1) ... [2020-07-21 13:31:11,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:10" (1/1) ... [2020-07-21 13:31:11,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:31:11,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:31:11,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:31:11,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:31:11,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:10" (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 [2020-07-21 13:31:11,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:31:11,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:31:11,190 INFO L138 BoogieDeclarations]: Found implementation of procedure plus [2020-07-21 13:31:11,190 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-07-21 13:31:11,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:31:11,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:31:11,191 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-07-21 13:31:11,191 INFO L130 BoogieDeclarations]: Found specification of procedure plus [2020-07-21 13:31:11,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:31:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:31:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:31:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 13:31:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 13:31:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:31:11,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:31:11,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:31:11,513 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:31:11,514 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 13:31:11,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:31:11 BoogieIcfgContainer [2020-07-21 13:31:11,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:31:11,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:31:11,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:31:11,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:31:11,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:31:10" (1/3) ... [2020-07-21 13:31:11,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0d2116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:31:11, skipping insertion in model container [2020-07-21 13:31:11,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:10" (2/3) ... [2020-07-21 13:31:11,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0d2116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:31:11, skipping insertion in model container [2020-07-21 13:31:11,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:31:11" (3/3) ... [2020-07-21 13:31:11,539 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-recursive.c [2020-07-21 13:31:11,561 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:31:11,572 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:31:11,638 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:31:11,722 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:31:11,723 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:31:11,723 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:31:11,723 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:31:11,723 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:31:11,723 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:31:11,724 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:31:11,724 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:31:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 13:31:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 13:31:11,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:31:11,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:31:11,768 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:31:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:31:11,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1703201428, now seen corresponding path program 1 times [2020-07-21 13:31:11,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:31:11,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091601085] [2020-07-21 13:31:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:31:11,936 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:31:11,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:31:11,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 13:31:11,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:31:12,053 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 [2020-07-21 13:31:12,054 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:12,074 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:12,075 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:12,075 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 13:31:12,153 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 [2020-07-21 13:31:12,155 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:12,165 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:12,166 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:12,167 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 13:31:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:31:12,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:31:12,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091601085] [2020-07-21 13:31:12,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:31:12,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:31:12,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096719344] [2020-07-21 13:31:12,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:31:12,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:31:12,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:31:12,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:31:12,244 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 13:31:12,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:31:12,399 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-07-21 13:31:12,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:31:12,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-21 13:31:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:31:12,421 INFO L225 Difference]: With dead ends: 39 [2020-07-21 13:31:12,421 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 13:31:12,428 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 [2020-07-21 13:31:12,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 13:31:12,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-07-21 13:31:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 13:31:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 13:31:12,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-07-21 13:31:12,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:31:12,510 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 13:31:12,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:31:12,510 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 13:31:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 13:31:12,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:31:12,512 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:31:12,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:31:12,730 INFO L427 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:31:12,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:31:12,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1207469216, now seen corresponding path program 1 times [2020-07-21 13:31:12,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:31:12,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889444853] [2020-07-21 13:31:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:31:12,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:31:12,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:31:12,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 13:31:12,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:31:12,902 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 [2020-07-21 13:31:12,903 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:12,916 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:12,917 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:12,918 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 13:31:13,031 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 [2020-07-21 13:31:13,035 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:13,043 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:13,044 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:13,045 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:13,141 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 [2020-07-21 13:31:13,143 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:13,147 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:13,148 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:13,149 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2020-07-21 13:31:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:31:13,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:31:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:31:13,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889444853] [2020-07-21 13:31:13,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:31:13,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-07-21 13:31:13,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048187612] [2020-07-21 13:31:13,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:31:13,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:31:13,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:31:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:31:13,571 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2020-07-21 13:31:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:31:14,031 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-07-21 13:31:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 13:31:14,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-07-21 13:31:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:31:14,034 INFO L225 Difference]: With dead ends: 32 [2020-07-21 13:31:14,035 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 13:31:14,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-07-21 13:31:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 13:31:14,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-21 13:31:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 13:31:14,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-21 13:31:14,047 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 16 [2020-07-21 13:31:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:31:14,047 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-21 13:31:14,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:31:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-21 13:31:14,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 13:31:14,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:31:14,049 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:31:14,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:31:14,266 INFO L427 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:31:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:31:14,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1116654880, now seen corresponding path program 2 times [2020-07-21 13:31:14,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:31:14,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645725541] [2020-07-21 13:31:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:31:14,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:31:14,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:31:14,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-21 13:31:14,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:31:14,385 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 [2020-07-21 13:31:14,386 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:14,392 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:14,393 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:14,394 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 13:31:14,450 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 [2020-07-21 13:31:14,451 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:14,455 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:14,456 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:14,456 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:14,533 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 [2020-07-21 13:31:14,535 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:14,539 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:14,540 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:14,540 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:14,644 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 [2020-07-21 13:31:14,646 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:14,653 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:14,654 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:14,655 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:14,764 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 [2020-07-21 13:31:14,766 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:14,774 INFO L624 ElimStorePlain]: treesize reduction 6, result has 14.3 percent of original size [2020-07-21 13:31:14,776 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:14,777 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2020-07-21 13:31:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:31:14,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:31:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:31:15,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645725541] [2020-07-21 13:31:15,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:31:15,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2020-07-21 13:31:15,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197805958] [2020-07-21 13:31:15,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 13:31:15,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:31:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 13:31:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 13:31:15,681 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 33 states. [2020-07-21 13:31:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:31:16,979 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-07-21 13:31:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 13:31:16,981 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 26 [2020-07-21 13:31:16,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:31:16,985 INFO L225 Difference]: With dead ends: 52 [2020-07-21 13:31:16,986 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 13:31:16,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=340, Invalid=2312, Unknown=0, NotChecked=0, Total=2652 [2020-07-21 13:31:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 13:31:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-07-21 13:31:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 13:31:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-07-21 13:31:17,028 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 26 [2020-07-21 13:31:17,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:31:17,029 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-07-21 13:31:17,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 13:31:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-07-21 13:31:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-21 13:31:17,035 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:31:17,035 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:31:17,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:31:17,250 INFO L427 AbstractCegarLoop]: === Iteration 4 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:31:17,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:31:17,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1667333664, now seen corresponding path program 3 times [2020-07-21 13:31:17,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:31:17,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866918821] [2020-07-21 13:31:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:31:17,353 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:31:17,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:31:17,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 163 conjunts are in the unsatisfiable core [2020-07-21 13:31:17,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:31:17,388 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 [2020-07-21 13:31:17,389 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,393 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:17,393 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,394 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 13:31:17,448 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 [2020-07-21 13:31:17,450 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,463 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:17,464 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,465 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:17,540 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 [2020-07-21 13:31:17,543 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,548 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:17,549 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,550 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:17,662 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 [2020-07-21 13:31:17,665 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,672 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:17,673 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,675 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:17,779 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 [2020-07-21 13:31:17,781 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,790 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:17,791 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,791 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:17,923 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 [2020-07-21 13:31:17,924 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,927 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:17,929 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:17,929 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:18,090 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 [2020-07-21 13:31:18,092 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:18,096 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:18,097 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:18,097 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:18,309 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 [2020-07-21 13:31:18,310 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:18,314 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:18,315 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:18,316 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:18,511 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 [2020-07-21 13:31:18,512 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:18,514 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:18,515 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:18,515 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2020-07-21 13:31:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:31:18,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:31:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:31:20,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866918821] [2020-07-21 13:31:20,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:31:20,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 65 [2020-07-21 13:31:20,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888325693] [2020-07-21 13:31:20,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-21 13:31:20,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:31:20,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-21 13:31:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=3754, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 13:31:20,646 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 65 states. [2020-07-21 13:31:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:31:23,076 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-07-21 13:31:23,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-07-21 13:31:23,077 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 46 [2020-07-21 13:31:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:31:23,079 INFO L225 Difference]: With dead ends: 72 [2020-07-21 13:31:23,079 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 13:31:23,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=920, Invalid=8200, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 13:31:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 13:31:23,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-07-21 13:31:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 13:31:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-07-21 13:31:23,095 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 46 [2020-07-21 13:31:23,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:31:23,095 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-07-21 13:31:23,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-21 13:31:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-07-21 13:31:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-21 13:31:23,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:31:23,098 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:31:23,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:31:23,306 INFO L427 AbstractCegarLoop]: === Iteration 5 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:31:23,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:31:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1460556000, now seen corresponding path program 4 times [2020-07-21 13:31:23,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:31:23,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38030951] [2020-07-21 13:31:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 13:31:23,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:31:23,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:31:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-21 13:31:23,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:31:23,501 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 17 treesize of output 9 [2020-07-21 13:31:23,502 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:23,519 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:23,520 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:23,521 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:1 [2020-07-21 13:31:23,555 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 [2020-07-21 13:31:23,557 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:23,560 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:23,561 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:23,562 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-07-21 13:31:23,609 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 [2020-07-21 13:31:23,611 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:31:23,616 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:31:23,617 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:31:23,618 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-21 13:31:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-07-21 13:31:23,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:31:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-07-21 13:31:23,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38030951] [2020-07-21 13:31:23,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:31:23,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-21 13:31:23,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746651886] [2020-07-21 13:31:23,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:31:23,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:31:23,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:31:23,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:31:23,755 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 11 states. [2020-07-21 13:31:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:31:23,894 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-07-21 13:31:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:31:23,895 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-07-21 13:31:23,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:31:23,896 INFO L225 Difference]: With dead ends: 67 [2020-07-21 13:31:23,896 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 13:31:23,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:31:23,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 13:31:23,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 13:31:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 13:31:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 13:31:23,900 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-07-21 13:31:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:31:23,903 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 13:31:23,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:31:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 13:31:23,904 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 13:31:24,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:31:24,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 13:31:24,983 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 97 [2020-07-21 13:31:25,583 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 99 [2020-07-21 13:31:25,939 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-07-21 13:31:26,295 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2020-07-21 13:31:26,302 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 13:31:26,303 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 13:31:26,303 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:31:26,304 INFO L268 CegarLoopResult]: For program point fooEXIT(lines 9 18) no Hoare annotation was computed. [2020-07-21 13:31:26,304 INFO L264 CegarLoopResult]: At program point fooENTRY(lines 9 18) the Hoare annotation is: (let ((.cse1 (select (select |old(#memory_int)| |foo_#in~p.base|) |foo_#in~p.offset|)) (.cse0 (select (select |#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 (< .cse0 19) (not (= 19 .cse1)) (= 19 .cse0)) (or (and (not (= 18 .cse1)) (not (< .cse1 18))) (< .cse0 18) (= 18 .cse0)) (or (not (= 13 .cse1)) (= 13 .cse0)) (or (not (= 10 .cse1)) (= 10 .cse0)) (or (= 17 .cse0) (not (= 17 .cse1))) (or (= 11 .cse0) (not (= 11 .cse1))) (or (= 14 .cse0) (not (= 14 .cse1))) (or (not (<= .cse1 20)) (<= .cse0 20)))) [2020-07-21 13:31:26,305 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-21 13:31:26,305 INFO L268 CegarLoopResult]: For program point fooErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-21 13:31:26,305 INFO L268 CegarLoopResult]: For program point L12(lines 12 17) no Hoare annotation was computed. [2020-07-21 13:31:26,306 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 (or (not (= 15 .cse0)) (and (= 15 .cse1) (= 15 .cse2))) (or (not (= 14 .cse0)) (and (= 14 .cse2) (= 14 .cse1))) (or (not (= 17 .cse0)) (and (= 17 .cse2) (or (= 17 .cse1) (< .cse1 17)))) (or (and (not (= 18 .cse0)) (not (< .cse0 18))) (and (or (< .cse2 18) (= 18 .cse2)) (or (< .cse1 18) (= 18 .cse1)))) (or (< .cse2 19) (not (= 19 .cse0)) (= 19 .cse2)) (or (not (= 11 .cse0)) (and (= 11 .cse2) (= 11 .cse1))) (or (not (= 10 .cse0)) (and (= 10 .cse1) (= 10 .cse2))) (or (and (= 12 .cse2) (= 12 .cse1)) (not (= 12 .cse0))) (or (not (= 13 .cse0)) (and (= 13 .cse2) (= 13 .cse1))) (or (not (<= .cse0 20)) (and (<= .cse1 19) (<= .cse2 20))) (or (and (= 16 .cse1) (= 16 .cse2)) (not (= 16 .cse0))))) [2020-07-21 13:31:26,306 INFO L268 CegarLoopResult]: For program point L10(lines 10 17) no Hoare annotation was computed. [2020-07-21 13:31:26,306 INFO L268 CegarLoopResult]: For program point L10-1(lines 9 18) no Hoare annotation was computed. [2020-07-21 13:31:26,306 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:31:26,306 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 13:31:26,306 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 13:31:26,306 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 13:31:26,307 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 20 26) the Hoare annotation is: true [2020-07-21 13:31:26,307 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 20 26) no Hoare annotation was computed. [2020-07-21 13:31:26,307 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)) [2020-07-21 13:31:26,307 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 20 26) no Hoare annotation was computed. [2020-07-21 13:31:26,307 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 13:31:26,308 INFO L268 CegarLoopResult]: For program point plusFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-21 13:31:26,308 INFO L264 CegarLoopResult]: At program point plusENTRY(lines 4 7) the Hoare annotation is: (let ((.cse1 (select (select |#memory_int| |plus_#in~p.base|) |plus_#in~p.offset|)) (.cse0 (select (select |old(#memory_int)| |plus_#in~p.base|) |plus_#in~p.offset|))) (and (or (not (= 12 .cse0)) (= 12 .cse1)) (or (= 11 .cse1) (not (= 11 .cse0))) (or (not (= 18 .cse0)) (< .cse1 18) (= 18 .cse1)) (or (= 16 .cse1) (not (= 16 .cse0))) (or (not (= 10 .cse0)) (= 10 .cse1)) (or (= 14 .cse1) (not (= 14 .cse0))) (or (not (= 13 .cse0)) (= 13 .cse1)) (or (not (<= .cse0 19)) (< .cse1 19) (= 19 .cse1)) (or (= 17 .cse1) (and (not (< .cse0 17)) (not (= 17 .cse0))) (< .cse1 17)) (or (= 15 .cse1) (not (= 15 .cse0))))) [2020-07-21 13:31:26,308 INFO L268 CegarLoopResult]: For program point plusEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-21 13:31:26,309 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (let ((.cse1 (select (select |#memory_int| |plus_#in~p.base|) |plus_#in~p.offset|)) (.cse2 (select (select |old(#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 (or (= 18 .cse0) (< .cse0 18)) (or (< .cse1 18) (= 18 .cse1))) (and (not (< .cse2 17)) (not (= 17 .cse2)))) (or (not (= 18 .cse2)) (and (or (= 19 .cse0) (< .cse0 19)) (or (< .cse1 19) (= 19 .cse1)))) (or (not (= 13 .cse2)) (and (= 14 .cse0) (= 14 .cse1))) (or (and (= 16 .cse1) (= 16 .cse0)) (not (= 15 .cse2))) (or (and (or (= 17 .cse1) (< .cse1 17)) (= 17 .cse0)) (not (= 16 .cse2))) (or (not (= 11 .cse2)) (and (= 12 .cse0) (= 12 .cse1))) (or (and (= 11 .cse1) (= 11 .cse0)) (not (= 10 .cse2))) (or (not (= 12 .cse2)) (and (= 13 .cse1) (= 13 .cse0))) (or (< .cse0 20) (not (<= .cse2 19)) (= 20 .cse0)))) [2020-07-21 13:31:26,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:31:26 BoogieIcfgContainer [2020-07-21 13:31:26,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:31:26,322 INFO L168 Benchmark]: Toolchain (without parser) took 15768.63 ms. Allocated memory was 136.3 MB in the beginning and 345.5 MB in the end (delta: 209.2 MB). Free memory was 100.8 MB in the beginning and 223.8 MB in the end (delta: -123.0 MB). Peak memory consumption was 198.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:31:26,323 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 13:31:26,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.30 ms. Allocated memory is still 136.3 MB. Free memory was 100.4 MB in the beginning and 90.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:31:26,325 INFO L168 Benchmark]: Boogie Preprocessor took 169.87 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 90.8 MB in the beginning and 178.9 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-21 13:31:26,326 INFO L168 Benchmark]: RCFGBuilder took 419.92 ms. Allocated memory is still 201.3 MB. Free memory was 178.9 MB in the beginning and 165.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:31:26,327 INFO L168 Benchmark]: TraceAbstraction took 14796.51 ms. Allocated memory was 201.3 MB in the beginning and 345.5 MB in the end (delta: 144.2 MB). Free memory was 164.4 MB in the beginning and 223.8 MB in the end (delta: -59.4 MB). Peak memory consumption was 197.5 MB. Max. memory is 7.1 GB. [2020-07-21 13:31:26,331 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 373.30 ms. Allocated memory is still 136.3 MB. Free memory was 100.4 MB in the beginning and 90.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 169.87 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 90.8 MB in the beginning and 178.9 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 419.92 ms. Allocated memory is still 201.3 MB. Free memory was 178.9 MB in the beginning and 165.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14796.51 ms. Allocated memory was 201.3 MB in the beginning and 345.5 MB in the end (delta: 144.2 MB). Free memory was 164.4 MB in the beginning and 223.8 MB in the end (delta: -59.4 MB). Peak memory consumption was 197.5 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: 12.3s, OverallIterations: 5, TraceHistogramMax: 12, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 51 SDslu, 442 SDs, 0 SdLazy, 1358 SolverSat, 109 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 375 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 51 PreInvPairs, 51 NumberOfFragments, 988 HoareAnnotationTreeSize, 51 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 9 FomulaSimplificationsInter, 1461 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 165 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 310 ConstructedInterpolants, 0 QuantifiedInterpolants, 67570 SizeOfPredicates, 102 NumberOfNonLiveVariables, 868 ConjunctsInSsa, 331 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 592/878 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...