/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:18:16,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:18:16,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:18:16,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:18:16,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:18:16,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:18:16,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:18:16,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:18:16,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:18:16,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:18:16,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:18:16,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:18:16,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:18:16,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:18:16,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:18:16,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:18:16,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:18:16,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:18:16,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:18:16,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:18:16,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:18:16,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:18:16,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:18:16,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:18:16,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 20:18:16,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 20:18:16,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 20:18:16,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 20:18:16,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 20:18:16,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 20:18:16,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 20:18:16,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 20:18:16,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 20:18:16,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 20:18:16,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 20:18:16,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 20:18:16,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 20:18:16,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 20:18:16,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:18:16,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:18:16,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:18:16,538 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 20:18:16,562 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:18:16,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:18:16,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:18:16,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:18:16,565 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:18:16,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:18:16,565 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:18:16,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:18:16,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:18:16,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:18:16,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:18:16,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:18:16,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:18:16,568 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:18:16,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:18:16,568 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:18:16,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:18:16,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:18:16,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:18:16,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:18:16,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:18:16,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:18:16,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:18:16,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:18:16,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:18:16,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:18:16,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:16,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:18:16,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:18:16,571 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 -> 2 [2020-07-21 20:18:16,878 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:18:16,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:18:16,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:18:16,899 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:18:16,900 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:18:16,900 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-21 20:18:16,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/417d9607f/204b48b1b0b74e428eb131c5b461a33f/FLAG93962197e [2020-07-21 20:18:17,427 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:18:17,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-21 20:18:17,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/417d9607f/204b48b1b0b74e428eb131c5b461a33f/FLAG93962197e [2020-07-21 20:18:17,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/417d9607f/204b48b1b0b74e428eb131c5b461a33f [2020-07-21 20:18:17,820 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:18:17,823 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:18:17,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:17,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:18:17,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:18:17,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:17" (1/1) ... [2020-07-21 20:18:17,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59dc4417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:17, skipping insertion in model container [2020-07-21 20:18:17,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:17" (1/1) ... [2020-07-21 20:18:17,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:18:17,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:18:18,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:18,095 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:18:18,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:18,143 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:18:18,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:18 WrapperNode [2020-07-21 20:18:18,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:18,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:18:18,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:18:18,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:18:18,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:18" (1/1) ... [2020-07-21 20:18:18,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:18" (1/1) ... [2020-07-21 20:18:18,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:18" (1/1) ... [2020-07-21 20:18:18,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:18" (1/1) ... [2020-07-21 20:18:18,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:18" (1/1) ... [2020-07-21 20:18:18,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:18" (1/1) ... [2020-07-21 20:18:18,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:18" (1/1) ... [2020-07-21 20:18:18,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:18:18,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:18:18,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:18:18,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:18:18,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:18" (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 20:18:18,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:18:18,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:18:18,352 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:18:18,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:18:18,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:18:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:18:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:18:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:18:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:18:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:18:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:18:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:18:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:18:18,712 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:18:18,712 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 20:18:18,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:18 BoogieIcfgContainer [2020-07-21 20:18:18,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:18:18,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:18:18,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:18:18,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:18:18,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:18:17" (1/3) ... [2020-07-21 20:18:18,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d89715d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:18, skipping insertion in model container [2020-07-21 20:18:18,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:18" (2/3) ... [2020-07-21 20:18:18,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d89715d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:18, skipping insertion in model container [2020-07-21 20:18:18,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:18" (3/3) ... [2020-07-21 20:18:18,725 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-07-21 20:18:18,734 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:18:18,740 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:18:18,752 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:18:18,778 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:18:18,778 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:18:18,778 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:18:18,778 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:18:18,779 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:18:18,779 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:18:18,779 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:18:18,779 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:18:18,798 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 20:18:18,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 20:18:18,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:18,804 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] [2020-07-21 20:18:18,805 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-21 20:18:18,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:18,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648565191] [2020-07-21 20:18:18,819 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 20:18:18,918 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:18,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:18,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:18,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:18,990 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 20:18:18,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:18,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648565191] [2020-07-21 20:18:18,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:18,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:18:18,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679226679] [2020-07-21 20:18:19,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:18:19,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:19,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:18:19,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:19,018 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-07-21 20:18:19,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:19,159 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2020-07-21 20:18:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:18:19,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-21 20:18:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:19,172 INFO L225 Difference]: With dead ends: 76 [2020-07-21 20:18:19,173 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 20:18:19,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 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 20:18:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 20:18:19,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-21 20:18:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 20:18:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-21 20:18:19,225 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-21 20:18:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:19,226 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-21 20:18:19,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:18:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-21 20:18:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 20:18:19,228 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:19,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:18:19,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:19,444 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:19,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-21 20:18:19,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:19,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382769323] [2020-07-21 20:18:19,448 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 20:18:19,532 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:19,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:19,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 20:18:19,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:19,584 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 20:18:19,585 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:19,590 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:19,591 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:19,591 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 20:18:19,630 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:19,631 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-21 20:18:19,632 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 20:18:19,647 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-21 20:18:19,648 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:19,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-21 20:18:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 20:18:19,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:19,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382769323] [2020-07-21 20:18:19,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:19,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 20:18:19,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234935179] [2020-07-21 20:18:19,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 20:18:19,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:19,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 20:18:19,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:18:19,690 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-21 20:18:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:19,844 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-21 20:18:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:18:19,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-21 20:18:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:19,847 INFO L225 Difference]: With dead ends: 52 [2020-07-21 20:18:19,847 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 20:18:19,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:18:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 20:18:19,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-21 20:18:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 20:18:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-21 20:18:19,863 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-21 20:18:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:19,863 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-21 20:18:19,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 20:18:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-21 20:18:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 20:18:19,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:19,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:18:20,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:20,077 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:20,078 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-21 20:18:20,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:20,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497944632] [2020-07-21 20:18:20,080 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 20:18:20,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:20,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:20,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 20:18:20,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:20,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497944632] [2020-07-21 20:18:20,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:20,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:18:20,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738465332] [2020-07-21 20:18:20,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:18:20,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:18:20,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:20,166 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 3 states. [2020-07-21 20:18:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:20,219 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-21 20:18:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:18:20,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 20:18:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:20,221 INFO L225 Difference]: With dead ends: 74 [2020-07-21 20:18:20,221 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 20:18:20,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 20:18:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-21 20:18:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 20:18:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-21 20:18:20,238 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-07-21 20:18:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:20,240 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-21 20:18:20,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:18:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-21 20:18:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 20:18:20,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:20,243 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, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:18:20,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:20,458 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:20,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:20,459 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-21 20:18:20,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:20,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157475154] [2020-07-21 20:18:20,460 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 20:18:20,525 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:20,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:20,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:18:20,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 20:18:20,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 20:18:20,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157475154] [2020-07-21 20:18:20,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:20,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 20:18:20,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680244935] [2020-07-21 20:18:20,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:18:20,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:20,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:18:20,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:18:20,642 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 9 states. [2020-07-21 20:18:20,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:20,817 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-07-21 20:18:20,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 20:18:20,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-07-21 20:18:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:20,819 INFO L225 Difference]: With dead ends: 91 [2020-07-21 20:18:20,819 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 20:18:20,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 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 20:18:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 20:18:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-21 20:18:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 20:18:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-21 20:18:20,829 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-21 20:18:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:20,829 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-21 20:18:20,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:18:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-21 20:18:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 20:18:20,831 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:20,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:18:21,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:21,046 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:21,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:21,046 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-21 20:18:21,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:21,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132338283] [2020-07-21 20:18:21,048 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 20:18:21,131 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:21,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-21 20:18:21,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:21,150 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-21 20:18:21,151 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:21,155 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:21,156 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:21,156 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-07-21 20:18:21,168 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 20:18:21,168 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:21,175 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:21,175 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:21,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-21 20:18:21,243 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-07-21 20:18:21,244 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 62 [2020-07-21 20:18:21,246 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:21,275 INFO L624 ElimStorePlain]: treesize reduction 32, result has 53.6 percent of original size [2020-07-21 20:18:21,276 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:21,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-07-21 20:18:21,348 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-21 20:18:21,349 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2020-07-21 20:18:21,351 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:21,365 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:21,366 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:21,366 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:34 [2020-07-21 20:18:21,447 INFO L350 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2020-07-21 20:18:21,448 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 2 case distinctions, treesize of input 47 treesize of output 44 [2020-07-21 20:18:21,450 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:21,465 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:21,467 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. [2020-07-21 20:18:21,468 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:48 [2020-07-21 20:18:21,865 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-07-21 20:18:21,866 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 44 [2020-07-21 20:18:21,867 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:21,887 INFO L624 ElimStorePlain]: treesize reduction 26, result has 29.7 percent of original size [2020-07-21 20:18:21,887 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:21,888 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:7 [2020-07-21 20:18:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:18:21,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:22,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:18:22,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:18:24,144 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 20:18:24,648 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 20:18:25,168 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 20:18:30,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132338283] [2020-07-21 20:18:30,214 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-07-21 20:18:30,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:30,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-21 20:18:30,214 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-21 20:18:30,215 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:18:30,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:30,440 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-21 20:18:30,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:18:30 BoogieIcfgContainer [2020-07-21 20:18:30,441 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:18:30,443 INFO L168 Benchmark]: Toolchain (without parser) took 12621.33 ms. Allocated memory was 143.1 MB in the beginning and 251.7 MB in the end (delta: 108.5 MB). Free memory was 100.6 MB in the beginning and 114.7 MB in the end (delta: -14.2 MB). Peak memory consumption was 94.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:30,443 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 143.1 MB. Free memory is still 118.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:18:30,444 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.18 ms. Allocated memory is still 143.1 MB. Free memory was 100.2 MB in the beginning and 89.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:30,445 INFO L168 Benchmark]: Boogie Preprocessor took 135.41 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 89.9 MB in the beginning and 177.5 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:30,445 INFO L168 Benchmark]: RCFGBuilder took 436.16 ms. Allocated memory is still 200.3 MB. Free memory was 177.5 MB in the beginning and 160.8 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:30,446 INFO L168 Benchmark]: TraceAbstraction took 11722.92 ms. Allocated memory was 200.3 MB in the beginning and 251.7 MB in the end (delta: 51.4 MB). Free memory was 159.8 MB in the beginning and 114.7 MB in the end (delta: 45.0 MB). Peak memory consumption was 96.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:30,449 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 143.1 MB. Free memory is still 118.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.18 ms. Allocated memory is still 143.1 MB. Free memory was 100.2 MB in the beginning and 89.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.41 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 89.9 MB in the beginning and 177.5 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 436.16 ms. Allocated memory is still 200.3 MB. Free memory was 177.5 MB in the beginning and 160.8 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11722.92 ms. Allocated memory was 200.3 MB in the beginning and 251.7 MB in the end (delta: 51.4 MB). Free memory was 159.8 MB in the beginning and 114.7 MB in the end (delta: 45.0 MB). Peak memory consumption was 96.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 [L29] COND TRUE i