/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 DAGSIZE --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/ldv-regression/test05.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:52:53,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:52:53,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:52:53,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:52:53,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:52:53,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:52:53,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:52:53,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:52:53,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:52:53,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:52:53,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:52:53,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:52:53,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:52:53,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:52:53,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:52:53,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:52:53,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:52:53,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:52:53,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:52:53,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:52:53,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:52:53,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:52:53,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:52:53,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:52:53,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 21:52:53,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 21:52:53,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 21:52:53,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 21:52:53,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 21:52:53,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 21:52:53,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 21:52:53,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 21:52:53,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 21:52:53,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 21:52:53,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 21:52:53,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 21:52:53,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 21:52:53,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 21:52:53,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:52:53,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:52:53,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:52:53,808 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 21:52:53,822 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:52:53,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:52:53,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:52:53,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:52:53,824 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:52:53,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:52:53,825 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:52:53,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:52:53,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:52:53,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:52:53,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:52:53,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:52:53,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:52:53,826 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:52:53,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:52:53,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:52:53,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:52:53,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:52:53,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:52:53,827 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:52:53,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:52:53,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:52:53,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:52:53,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:52:53,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:52:53,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:52:53,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:53,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:52:53,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:52:53,829 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 -> DAGSIZE 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 21:52:54,106 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:52:54,119 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:52:54,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:52:54,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:52:54,125 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:52:54,125 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test05.c [2020-07-20 21:52:54,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99864313/d8d357fb6f0044d1adc5cb96c034c181/FLAG4a2e1c2e8 [2020-07-20 21:52:54,714 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:52:54,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test05.c [2020-07-20 21:52:54,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99864313/d8d357fb6f0044d1adc5cb96c034c181/FLAG4a2e1c2e8 [2020-07-20 21:52:55,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99864313/d8d357fb6f0044d1adc5cb96c034c181 [2020-07-20 21:52:55,064 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:52:55,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:52:55,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:52:55,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:52:55,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:52:55,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:52:55" (1/1) ... [2020-07-20 21:52:55,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b7012a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:55, skipping insertion in model container [2020-07-20 21:52:55,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:52:55" (1/1) ... [2020-07-20 21:52:55,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:52:55,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:52:55,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:52:55,285 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:52:55,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:52:55,321 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:52:55,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:55 WrapperNode [2020-07-20 21:52:55,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:52:55,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:52:55,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:52:55,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:52:55,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:55" (1/1) ... [2020-07-20 21:52:55,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:55" (1/1) ... [2020-07-20 21:52:55,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:55" (1/1) ... [2020-07-20 21:52:55,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:55" (1/1) ... [2020-07-20 21:52:55,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:55" (1/1) ... [2020-07-20 21:52:55,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:55" (1/1) ... [2020-07-20 21:52:55,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:55" (1/1) ... [2020-07-20 21:52:55,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:52:55,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:52:55,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:52:55,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:52:55,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:55" (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 21:52:55,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:52:55,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:52:55,518 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-07-20 21:52:55,518 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-20 21:52:55,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:52:55,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:52:55,519 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-07-20 21:52:55,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 21:52:55,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 21:52:55,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:52:55,519 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-20 21:52:55,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:52:55,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 21:52:55,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:52:55,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:52:55,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:52:55,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:52:55,803 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:52:55,804 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:52:55,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:52:55 BoogieIcfgContainer [2020-07-20 21:52:55,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:52:55,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:52:55,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:52:55,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:52:55,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:52:55" (1/3) ... [2020-07-20 21:52:55,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373e49c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:52:55, skipping insertion in model container [2020-07-20 21:52:55,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:55" (2/3) ... [2020-07-20 21:52:55,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373e49c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:52:55, skipping insertion in model container [2020-07-20 21:52:55,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:52:55" (3/3) ... [2020-07-20 21:52:55,818 INFO L109 eAbstractionObserver]: Analyzing ICFG test05.c [2020-07-20 21:52:55,836 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:52:55,846 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:52:55,864 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:52:55,892 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:52:55,892 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:52:55,893 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:52:55,893 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:52:55,893 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:52:55,893 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:52:55,894 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:52:55,894 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:52:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-20 21:52:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:52:55,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:52:55,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:52:55,924 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:52:55,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:52:55,930 INFO L82 PathProgramCache]: Analyzing trace with hash -685779266, now seen corresponding path program 1 times [2020-07-20 21:52:55,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:52:55,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842978120] [2020-07-20 21:52:55,941 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 21:52:56,102 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:52:56,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:52:56,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:52:56,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:52:56,205 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 21:52:56,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:52:56,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842978120] [2020-07-20 21:52:56,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:52:56,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:52:56,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540587651] [2020-07-20 21:52:56,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:52:56,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:52:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:52:56,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:52:56,227 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-07-20 21:52:56,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:52:56,320 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-07-20 21:52:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:52:56,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 21:52:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:52:56,333 INFO L225 Difference]: With dead ends: 36 [2020-07-20 21:52:56,334 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 21:52:56,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 21:52:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 21:52:56,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 21:52:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 21:52:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-20 21:52:56,372 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2020-07-20 21:52:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:52:56,373 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-20 21:52:56,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:52:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-20 21:52:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:52:56,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:52:56,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:52:56,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:56,576 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:52:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:52:56,577 INFO L82 PathProgramCache]: Analyzing trace with hash 636648720, now seen corresponding path program 1 times [2020-07-20 21:52:56,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:52:56,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239006171] [2020-07-20 21:52:56,579 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 21:52:56,796 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:52:56,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:52:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:52:56,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:52:56,849 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 21:52:56,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:52:56,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239006171] [2020-07-20 21:52:56,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:52:56,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 21:52:56,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730957285] [2020-07-20 21:52:56,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:52:56,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:52:56,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:52:56,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:52:56,853 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 7 states. [2020-07-20 21:52:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:52:56,910 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2020-07-20 21:52:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:52:56,911 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-20 21:52:56,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:52:56,913 INFO L225 Difference]: With dead ends: 23 [2020-07-20 21:52:56,913 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 21:52:56,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:52:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 21:52:56,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 21:52:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 21:52:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2020-07-20 21:52:56,920 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 19 [2020-07-20 21:52:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:52:56,921 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2020-07-20 21:52:56,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:52:56,921 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2020-07-20 21:52:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:52:56,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:52:56,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:52:57,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:57,134 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:52:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:52:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1738724303, now seen corresponding path program 1 times [2020-07-20 21:52:57,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:52:57,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722798536] [2020-07-20 21:52:57,138 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 21:52:57,281 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:52:57,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:52:57,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-20 21:52:57,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:52:57,404 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:57,405 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 58 [2020-07-20 21:52:57,415 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:52:57,417 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:52:57,429 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:52:57,431 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:52:57,432 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:52:57,433 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:52:57,435 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 21:52:57,436 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:52:57,437 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:52:57,438 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:52:57,439 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:57,477 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:57,481 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.base_23|], 2=[|v_#memory_$Pointer$.base_22|, |v_#memory_$Pointer$.base_21|]} [2020-07-20 21:52:57,493 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 15 [2020-07-20 21:52:57,494 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:57,523 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:57,529 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:57,554 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:57,561 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2020-07-20 21:52:57,562 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:57,581 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:57,583 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:52:57,583 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:127, output treesize:44 [2020-07-20 21:52:57,646 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_24|], 4=[|v_#memory_$Pointer$.offset_21|]} [2020-07-20 21:52:57,666 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 23 treesize of output 15 [2020-07-20 21:52:57,667 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:57,683 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:57,777 INFO L350 Elim1Store]: treesize reduction 34, result has 73.6 percent of original size [2020-07-20 21:52:57,778 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 134 treesize of output 179 [2020-07-20 21:52:57,782 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 3, 2, 1] term [2020-07-20 21:52:57,782 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 21:52:57,785 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-07-20 21:52:57,896 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-07-20 21:52:57,897 INFO L624 ElimStorePlain]: treesize reduction 124, result has 60.8 percent of original size [2020-07-20 21:52:57,898 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 21:52:57,898 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:192 [2020-07-20 21:52:58,061 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 21:52:58,062 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:52:58,065 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 21:52:58,066 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 21:52:58,068 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 21:52:58,069 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:52:58,117 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:58,117 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 143 [2020-07-20 21:52:58,120 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 3, 2, 1] term [2020-07-20 21:52:58,121 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-07-20 21:52:58,122 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:58,175 INFO L624 ElimStorePlain]: treesize reduction 88, result has 45.7 percent of original size [2020-07-20 21:52:58,178 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 21:52:58,179 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:129, output treesize:74 [2020-07-20 21:52:58,257 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_25|], 6=[|v_#memory_$Pointer$.base_25|, |v_#memory_$Pointer$.offset_22|]} [2020-07-20 21:52:58,265 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2020-07-20 21:52:58,267 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:58,309 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:58,317 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2020-07-20 21:52:58,318 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:58,349 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:58,356 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 29 [2020-07-20 21:52:58,358 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:58,397 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:58,399 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 3 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 21:52:58,400 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:115, output treesize:58 [2020-07-20 21:52:58,452 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2020-07-20 21:52:58,454 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:52:58,472 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:58,476 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2020-07-20 21:52:58,478 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:52:58,490 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:58,493 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 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 21:52:58,494 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:58,501 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:58,502 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:52:58,503 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:73, output treesize:3 [2020-07-20 21:52:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:52:58,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:52:58,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722798536] [2020-07-20 21:52:58,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:52:58,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-20 21:52:58,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368254] [2020-07-20 21:52:58,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:52:58,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:52:58,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:52:58,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:52:58,545 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand 10 states. [2020-07-20 21:52:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:52:58,998 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2020-07-20 21:52:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:52:58,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-07-20 21:52:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:52:58,999 INFO L225 Difference]: With dead ends: 21 [2020-07-20 21:52:58,999 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:52:59,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:52:59,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:52:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:52:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:52:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:52:59,001 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-07-20 21:52:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:52:59,001 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:52:59,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:52:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:52:59,002 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:52:59,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:59,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:52:59,313 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:52:59,313 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:52:59,314 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:52:59,314 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (= |f_#in~a| f_~a) (= |f_#in~p1.base| f_~p1.base) (= f_~p1.offset |f_#in~p1.offset|) (= |f_#in~p2.base| f_~p2.base) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (= f_~p2.offset |f_#in~p2.offset|)) [2020-07-20 21:52:59,314 INFO L268 CegarLoopResult]: For program point L12(lines 12 17) no Hoare annotation was computed. [2020-07-20 21:52:59,314 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 21:52:59,314 INFO L268 CegarLoopResult]: For program point fEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 21:52:59,314 INFO L264 CegarLoopResult]: At program point fENTRY(lines 11 18) the Hoare annotation is: (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) [2020-07-20 21:52:59,315 INFO L268 CegarLoopResult]: For program point fFINAL(lines 11 18) no Hoare annotation was computed. [2020-07-20 21:52:59,315 INFO L268 CegarLoopResult]: For program point gEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-20 21:52:59,315 INFO L268 CegarLoopResult]: For program point gFINAL(lines 4 9) no Hoare annotation was computed. [2020-07-20 21:52:59,315 INFO L264 CegarLoopResult]: At program point gENTRY(lines 4 9) the Hoare annotation is: (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) [2020-07-20 21:52:59,317 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:52:59,317 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:52:59,317 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:52:59,317 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:52:59,318 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (select (select |#memory_$Pointer$.base| |main_~#p2~0.base|) |main_~#p2~0.offset|))) (and (not (= .cse0 |main_~#p2~0.base|)) (not (= .cse0 |main_~#a~0.base|)) (not (= |main_~#p1~0.base| |main_~#p2~0.base|)) (not (= |main_~#p2~0.base| |main_~#a~0.base|)) (not (= .cse0 |main_~#p1~0.base|)) (= 4 |main_#t~mem4|) (= 0 |main_~#p2~0.offset|) (not (= |main_~#p1~0.base| |main_~#a~0.base|)) (= (select (select |#memory_$Pointer$.base| |main_~#p1~0.base|) |main_~#p1~0.offset|) |main_~#a~0.base|))) [2020-07-20 21:52:59,318 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-07-20 21:52:59,318 INFO L268 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-07-20 21:52:59,318 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 20 46) the Hoare annotation is: (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) [2020-07-20 21:52:59,318 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 20 46) no Hoare annotation was computed. [2020-07-20 21:52:59,318 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 20 46) no Hoare annotation was computed. [2020-07-20 21:52:59,319 INFO L264 CegarLoopResult]: At program point L39(lines 20 46) the Hoare annotation is: false [2020-07-20 21:52:59,319 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-20 21:52:59,319 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-20 21:52:59,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:52:59 BoogieIcfgContainer [2020-07-20 21:52:59,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:52:59,336 INFO L168 Benchmark]: Toolchain (without parser) took 4269.19 ms. Allocated memory was 145.8 MB in the beginning and 245.9 MB in the end (delta: 100.1 MB). Free memory was 103.1 MB in the beginning and 171.1 MB in the end (delta: -68.0 MB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:59,336 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 145.8 MB. Free memory is still 121.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 21:52:59,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.72 ms. Allocated memory is still 145.8 MB. Free memory was 102.7 MB in the beginning and 92.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:59,338 INFO L168 Benchmark]: Boogie Preprocessor took 128.81 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 92.5 MB in the beginning and 181.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:59,339 INFO L168 Benchmark]: RCFGBuilder took 357.71 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 161.4 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:59,345 INFO L168 Benchmark]: TraceAbstraction took 3523.27 ms. Allocated memory was 203.4 MB in the beginning and 245.9 MB in the end (delta: 42.5 MB). Free memory was 161.4 MB in the beginning and 171.1 MB in the end (delta: -9.7 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:59,356 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 145.8 MB. Free memory is still 121.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.72 ms. Allocated memory is still 145.8 MB. Free memory was 102.7 MB in the beginning and 92.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.81 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 92.5 MB in the beginning and 181.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 357.71 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 161.4 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3523.27 ms. Allocated memory was 203.4 MB in the beginning and 245.9 MB in the end (delta: 42.5 MB). Free memory was 161.4 MB in the beginning and 171.1 MB in the end (delta: -9.7 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 52 SDtfs, 15 SDslu, 166 SDs, 0 SdLazy, 96 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 82 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 2 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 53 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 50 ConstructedInterpolants, 2 QuantifiedInterpolants, 23409 SizeOfPredicates, 35 NumberOfNonLiveVariables, 342 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...