/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s3iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:42:42,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:42:42,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:42:42,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:42:42,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:42:42,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:42:42,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:42:42,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:42:42,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:42:42,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:42:42,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:42:42,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:42:42,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:42:42,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:42:42,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:42:42,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:42:42,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:42:42,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:42:42,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:42:42,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:42:42,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:42:42,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:42:42,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:42:42,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:42:42,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:42:42,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:42:42,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:42:42,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:42:42,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:42:42,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:42:42,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:42:42,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:42:42,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:42:42,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:42:42,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:42:42,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:42:42,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:42:42,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:42:42,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:42:42,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:42:42,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:42:42,335 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 16:42:42,348 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:42:42,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:42:42,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:42:42,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:42:42,350 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:42:42,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:42:42,351 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:42:42,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:42:42,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:42:42,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:42:42,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:42:42,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:42:42,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:42:42,352 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:42:42,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:42:42,352 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:42:42,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:42:42,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:42:42,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:42:42,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:42:42,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:42:42,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:42:42,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:42:42,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:42:42,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:42:42,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:42:42,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:42,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:42:42,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:42:42,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:42:42,657 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:42:42,670 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:42:42,674 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:42:42,675 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:42:42,675 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:42:42,676 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3iff.c [2020-07-21 16:42:42,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9641cfa19/d1f47bd8b82f47f9b0123d6d3ad50ab8/FLAG36e975b3b [2020-07-21 16:42:43,182 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:42:43,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s3iff.c [2020-07-21 16:42:43,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9641cfa19/d1f47bd8b82f47f9b0123d6d3ad50ab8/FLAG36e975b3b [2020-07-21 16:42:43,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9641cfa19/d1f47bd8b82f47f9b0123d6d3ad50ab8 [2020-07-21 16:42:43,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:42:43,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:42:43,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:42:43,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:42:43,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:42:43,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:42:43" (1/1) ... [2020-07-21 16:42:43,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@636ba6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:43, skipping insertion in model container [2020-07-21 16:42:43,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:42:43" (1/1) ... [2020-07-21 16:42:43,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:42:43,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:42:43,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:42:43,771 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:42:43,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:42:43,806 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:42:43,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:43 WrapperNode [2020-07-21 16:42:43,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:42:43,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:42:43,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:42:43,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:42:43,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:43" (1/1) ... [2020-07-21 16:42:43,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:43" (1/1) ... [2020-07-21 16:42:43,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:43" (1/1) ... [2020-07-21 16:42:43,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:43" (1/1) ... [2020-07-21 16:42:43,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:43" (1/1) ... [2020-07-21 16:42:43,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:43" (1/1) ... [2020-07-21 16:42:43,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:43" (1/1) ... [2020-07-21 16:42:43,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:42:43,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:42:43,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:42:43,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:42:43,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:43" (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 16:42:44,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:42:44,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:42:44,004 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:42:44,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:42:44,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:42:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:42:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:42:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:42:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:42:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:42:44,007 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:42:44,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:42:44,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:42:44,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:42:44,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:42:44,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:42:44,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:42:44,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:42:44,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:42:44,301 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:42:44,302 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 16:42:44,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:42:44 BoogieIcfgContainer [2020-07-21 16:42:44,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:42:44,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:42:44,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:42:44,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:42:44,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:42:43" (1/3) ... [2020-07-21 16:42:44,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0f7343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:42:44, skipping insertion in model container [2020-07-21 16:42:44,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:43" (2/3) ... [2020-07-21 16:42:44,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0f7343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:42:44, skipping insertion in model container [2020-07-21 16:42:44,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:42:44" (3/3) ... [2020-07-21 16:42:44,314 INFO L109 eAbstractionObserver]: Analyzing ICFG s3iff.c [2020-07-21 16:42:44,324 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:42:44,331 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:42:44,345 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:42:44,372 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:42:44,373 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:42:44,373 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:42:44,373 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:42:44,373 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:42:44,374 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:42:44,374 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:42:44,374 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:42:44,399 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 16:42:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 16:42:44,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:44,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:42:44,405 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:44,410 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 16:42:44,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:44,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245310926] [2020-07-21 16:42:44,418 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 16:42:44,522 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:44,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:42:44,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:42:44,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:42:44,554 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 16:42:44,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:42:44,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245310926] [2020-07-21 16:42:44,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:42:44,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:42:44,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158450737] [2020-07-21 16:42:44,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:42:44,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:42:44,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:42:44,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:42:44,574 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-21 16:42:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:42:44,595 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-21 16:42:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:42:44,597 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 16:42:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:42:44,606 INFO L225 Difference]: With dead ends: 54 [2020-07-21 16:42:44,606 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 16:42:44,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:42:44,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 16:42:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 16:42:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 16:42:44,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-21 16:42:44,650 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-21 16:42:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:42:44,651 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-21 16:42:44,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:42:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-21 16:42:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 16:42:44,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:44,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:42:44,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:44,867 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:44,868 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-21 16:42:44,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:44,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159221113] [2020-07-21 16:42:44,870 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 16:42:44,937 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:44,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:42:44,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:42:44,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:42:45,000 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 16:42:45,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:42:45,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159221113] [2020-07-21 16:42:45,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:42:45,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:42:45,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735899916] [2020-07-21 16:42:45,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:42:45,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:42:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:42:45,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:42:45,007 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-07-21 16:42:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:42:45,095 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-21 16:42:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:42:45,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 16:42:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:42:45,098 INFO L225 Difference]: With dead ends: 40 [2020-07-21 16:42:45,098 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 16:42:45,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:42:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 16:42:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 16:42:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 16:42:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 16:42:45,113 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 16:42:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:42:45,115 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 16:42:45,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:42:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 16:42:45,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 16:42:45,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:45,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:42:45,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:45,321 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 16:42:45,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:45,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355447824] [2020-07-21 16:42:45,323 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 16:42:45,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:45,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:42:45,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:42:45,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:42:45,455 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 16:42:45,456 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:42:45,472 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:42:45,473 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:42:45,473 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-21 16:42:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:42:45,503 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-21 16:42:45,505 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:42:45,519 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:42:45,520 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:42:45,521 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-07-21 16:42:45,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:42:45,723 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:42:45,723 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-07-21 16:42:45,727 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:42:45,771 INFO L624 ElimStorePlain]: treesize reduction 35, result has 52.1 percent of original size [2020-07-21 16:42:45,775 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 16:42:45,775 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:74, output treesize:35 [2020-07-21 16:42:45,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:42:45,840 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 26 treesize of output 10 [2020-07-21 16:42:45,841 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:42:45,853 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:42:45,855 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:42:45,855 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:42, output treesize:10 [2020-07-21 16:42:45,877 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:42:45,929 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 16:42:45,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:42:45,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:42:46,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:43:00,937 WARN L193 SmtUtils]: Spent 7.56 s on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:43:00,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:43:01,004 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 16:43:01,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355447824] [2020-07-21 16:43:01,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:43:01,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-21 16:43:01,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852363868] [2020-07-21 16:43:01,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:43:01,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:43:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:43:01,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=313, Unknown=3, NotChecked=0, Total=380 [2020-07-21 16:43:01,008 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2020-07-21 16:43:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:43:01,929 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-07-21 16:43:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 16:43:01,931 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-07-21 16:43:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:43:01,933 INFO L225 Difference]: With dead ends: 51 [2020-07-21 16:43:01,933 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 16:43:01,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=105, Invalid=542, Unknown=3, NotChecked=0, Total=650 [2020-07-21 16:43:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 16:43:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-07-21 16:43:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 16:43:01,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 16:43:01,943 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-21 16:43:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:43:01,944 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 16:43:01,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:43:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 16:43:01,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 16:43:01,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:43:01,945 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:43:02,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:02,161 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:43:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:43:02,162 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-21 16:43:02,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:43:02,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588871666] [2020-07-21 16:43:02,163 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 16:43:02,209 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:43:02,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:43:02,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:43:02,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:43:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:43:02,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:43:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:43:02,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588871666] [2020-07-21 16:43:02,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:43:02,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 16:43:02,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484386898] [2020-07-21 16:43:02,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 16:43:02,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:43:02,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 16:43:02,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:43:02,297 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-21 16:43:02,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:43:02,480 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-21 16:43:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:43:02,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 16:43:02,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:43:02,485 INFO L225 Difference]: With dead ends: 45 [2020-07-21 16:43:02,485 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 16:43:02,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:43:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 16:43:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-21 16:43:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 16:43:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 16:43:02,497 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-21 16:43:02,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:43:02,498 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 16:43:02,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 16:43:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 16:43:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 16:43:02,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:43:02,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:43:02,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:02,702 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:43:02,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:43:02,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-21 16:43:02,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:43:02,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988004746] [2020-07-21 16:43:02,705 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 16:43:02,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:43:02,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:43:02,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:43:02,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:43:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:43:02,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:43:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:43:02,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988004746] [2020-07-21 16:43:02,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:43:02,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 16:43:02,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533803434] [2020-07-21 16:43:02,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 16:43:02,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:43:02,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 16:43:02,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:43:02,864 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-21 16:43:02,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:43:02,984 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-21 16:43:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:43:02,985 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-21 16:43:02,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:43:02,986 INFO L225 Difference]: With dead ends: 49 [2020-07-21 16:43:02,987 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 16:43:02,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:43:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 16:43:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 16:43:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 16:43:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 16:43:02,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-21 16:43:02,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:43:03,000 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 16:43:03,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 16:43:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 16:43:03,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 16:43:03,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:43:03,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:43:03,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:03,203 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:43:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:43:03,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-21 16:43:03,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:43:03,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448191682] [2020-07-21 16:43:03,205 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:03,263 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:43:03,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:43:03,264 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:43:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:43:03,286 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:43:03,325 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:43:03,325 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:43:03,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:03,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:43:03 BoogieIcfgContainer [2020-07-21 16:43:03,570 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:43:03,572 INFO L168 Benchmark]: Toolchain (without parser) took 20018.05 ms. Allocated memory was 142.6 MB in the beginning and 251.1 MB in the end (delta: 108.5 MB). Free memory was 100.4 MB in the beginning and 100.8 MB in the end (delta: -435.7 kB). Peak memory consumption was 108.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:03,572 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 16:43:03,573 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.01 ms. Allocated memory is still 142.6 MB. Free memory was 100.0 MB in the beginning and 89.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:03,574 INFO L168 Benchmark]: Boogie Preprocessor took 126.09 ms. Allocated memory was 142.6 MB in the beginning and 199.8 MB in the end (delta: 57.1 MB). Free memory was 89.5 MB in the beginning and 177.0 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:03,575 INFO L168 Benchmark]: RCFGBuilder took 371.54 ms. Allocated memory is still 199.8 MB. Free memory was 177.0 MB in the beginning and 160.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:03,576 INFO L168 Benchmark]: TraceAbstraction took 19262.94 ms. Allocated memory was 199.8 MB in the beginning and 251.1 MB in the end (delta: 51.4 MB). Free memory was 159.5 MB in the beginning and 100.8 MB in the end (delta: 58.7 MB). Peak memory consumption was 110.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:03,579 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.01 ms. Allocated memory is still 142.6 MB. Free memory was 100.0 MB in the beginning and 89.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.09 ms. Allocated memory was 142.6 MB in the beginning and 199.8 MB in the end (delta: 57.1 MB). Free memory was 89.5 MB in the beginning and 177.0 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.54 ms. Allocated memory is still 199.8 MB. Free memory was 177.0 MB in the beginning and 160.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19262.94 ms. Allocated memory was 199.8 MB in the beginning and 251.1 MB in the end (delta: 51.4 MB). Free memory was 159.5 MB in the beginning and 100.8 MB in the end (delta: 58.7 MB). Peak memory consumption was 110.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=9, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={5854:0}, i=0, malloc(sizeof(int)*N)={5854:0}, N=2, sum={5856:0}] [L30] COND TRUE i