/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/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:18:02,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:18:02,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:18:02,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:18:02,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:18:02,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:18:02,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:18:02,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:18:02,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:18:02,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:18:02,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:18:02,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:18:02,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:18:02,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:18:02,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:18:02,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:18:02,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:18:02,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:18:02,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:18:02,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:18:02,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:18:02,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:18:02,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:18:02,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:18:02,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 20:18:02,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 20:18:02,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 20:18:02,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 20:18:02,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 20:18:02,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 20:18:02,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 20:18:02,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 20:18:02,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 20:18:02,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 20:18:02,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 20:18:02,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 20:18:02,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 20:18:02,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 20:18:02,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:18:02,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:18:02,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:18:02,125 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 20:18:02,138 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:18:02,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:18:02,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:18:02,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:18:02,140 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:18:02,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:18:02,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:18:02,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:18:02,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:18:02,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:18:02,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:18:02,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:18:02,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:18:02,142 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:18:02,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:18:02,142 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:18:02,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:18:02,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:18:02,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:18:02,143 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:18:02,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:18:02,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:18:02,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:18:02,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:18:02,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:18:02,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:18:02,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:02,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:18:02,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:18:02,145 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 20:18:02,407 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:18:02,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:18:02,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:18:02,426 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:18:02,427 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:18:02,427 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-07-21 20:18:02,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f64ab78/57a5ddab128040e2ab0a7ec1b6e00836/FLAG9a8056a42 [2020-07-21 20:18:03,008 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:18:03,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs2f.c [2020-07-21 20:18:03,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f64ab78/57a5ddab128040e2ab0a7ec1b6e00836/FLAG9a8056a42 [2020-07-21 20:18:03,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f64ab78/57a5ddab128040e2ab0a7ec1b6e00836 [2020-07-21 20:18:03,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:18:03,431 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:18:03,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:03,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:18:03,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:18:03,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a47b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03, skipping insertion in model container [2020-07-21 20:18:03,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:18:03,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:18:03,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:03,699 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:18:03,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:03,824 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:18:03,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03 WrapperNode [2020-07-21 20:18:03,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:03,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:18:03,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:18:03,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:18:03,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:18:03,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:18:03,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:18:03,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:18:03,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (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 20:18:03,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:18:03,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:18:03,931 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:18:03,932 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:18:03,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:18:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:18:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:18:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:18:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:18:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:18:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:18:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:18:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 20:18:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:18:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:18:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:18:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:18:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:18:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:18:04,276 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:18:04,277 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 20:18:04,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:04 BoogieIcfgContainer [2020-07-21 20:18:04,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:18:04,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:18:04,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:18:04,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:18:04,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:18:03" (1/3) ... [2020-07-21 20:18:04,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad37d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:04, skipping insertion in model container [2020-07-21 20:18:04,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (2/3) ... [2020-07-21 20:18:04,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad37d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:04, skipping insertion in model container [2020-07-21 20:18:04,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:04" (3/3) ... [2020-07-21 20:18:04,289 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-07-21 20:18:04,298 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:18:04,305 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:18:04,319 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:18:04,341 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:18:04,341 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:18:04,341 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:18:04,341 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:18:04,342 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:18:04,342 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:18:04,342 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:18:04,342 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:18:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 20:18:04,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 20:18:04,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:04,365 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 20:18:04,366 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:04,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-21 20:18:04,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:04,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901804215] [2020-07-21 20:18:04,379 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 20:18:04,472 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:04,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:04,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:04,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:04,551 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 20:18:04,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:04,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901804215] [2020-07-21 20:18:04,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:04,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:18:04,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429792256] [2020-07-21 20:18:04,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:18:04,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:04,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:18:04,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:04,577 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-07-21 20:18:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:04,696 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-07-21 20:18:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:18:04,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 20:18:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:04,708 INFO L225 Difference]: With dead ends: 66 [2020-07-21 20:18:04,708 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 20:18:04,712 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 20:18:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 20:18:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-21 20:18:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 20:18:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-21 20:18:04,759 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-07-21 20:18:04,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:04,760 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-21 20:18:04,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:18:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-21 20:18:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 20:18:04,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:04,762 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] [2020-07-21 20:18:04,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:04,966 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:04,966 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-21 20:18:04,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:04,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058097990] [2020-07-21 20:18:04,967 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 20:18:05,036 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:05,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:05,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:18:05,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:05,134 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 20:18:05,135 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:05,143 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:05,143 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:05,144 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-21 20:18:05,174 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 20:18:05,175 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:05,182 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:05,183 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 20:18:05,183 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-07-21 20:18:05,203 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:18:05,211 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:18:05,246 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 20:18:05,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:05,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058097990] [2020-07-21 20:18:05,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:05,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 20:18:05,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976700031] [2020-07-21 20:18:05,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 20:18:05,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:05,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 20:18:05,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:18:05,254 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-07-21 20:18:05,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:05,390 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-21 20:18:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:18:05,391 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-07-21 20:18:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:05,392 INFO L225 Difference]: With dead ends: 37 [2020-07-21 20:18:05,392 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 20:18:05,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-21 20:18:05,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 20:18:05,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-21 20:18:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 20:18:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-21 20:18:05,401 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-07-21 20:18:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:05,402 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-21 20:18:05,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 20:18:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-21 20:18:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 20:18:05,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:05,404 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] [2020-07-21 20:18:05,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:05,617 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:05,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:05,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-07-21 20:18:05,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:05,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208625301] [2020-07-21 20:18:05,620 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 20:18:05,681 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:05,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:05,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:05,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:05,699 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 20:18:05,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:05,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208625301] [2020-07-21 20:18:05,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:05,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:18:05,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730311616] [2020-07-21 20:18:05,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:18:05,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:05,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:18:05,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:05,702 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 3 states. [2020-07-21 20:18:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:05,744 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-21 20:18:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:18:05,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 20:18:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:05,747 INFO L225 Difference]: With dead ends: 48 [2020-07-21 20:18:05,747 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 20:18:05,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 20:18:05,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 20:18:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-07-21 20:18:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 20:18:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 20:18:05,760 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-07-21 20:18:05,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:05,761 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 20:18:05,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:18:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 20:18:05,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 20:18:05,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:05,766 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, 1, 1] [2020-07-21 20:18:05,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:05,981 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:05,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-07-21 20:18:05,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:05,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16569008] [2020-07-21 20:18:05,984 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 20:18:06,043 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:06,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:06,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:18:06,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:06,096 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 20:18:06,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:18:06,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16569008] [2020-07-21 20:18:06,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:06,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 20:18:06,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686606603] [2020-07-21 20:18:06,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:18:06,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:06,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:18:06,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:18:06,148 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-07-21 20:18:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:06,265 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-21 20:18:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 20:18:06,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-07-21 20:18:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:06,267 INFO L225 Difference]: With dead ends: 54 [2020-07-21 20:18:06,267 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 20:18:06,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 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 20:18:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 20:18:06,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-07-21 20:18:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 20:18:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 20:18:06,275 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 30 [2020-07-21 20:18:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:06,275 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 20:18:06,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:18:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 20:18:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 20:18:06,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:06,277 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 20:18:06,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:06,491 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:06,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:06,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-07-21 20:18:06,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:06,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772548026] [2020-07-21 20:18:06,494 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 20:18:06,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:06,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:06,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 20:18:06,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:06,619 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 13 treesize of output 9 [2020-07-21 20:18:06,619 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:06,626 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:06,626 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:06,627 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-07-21 20:18:06,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:18:06,658 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 21 treesize of output 20 [2020-07-21 20:18:06,659 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:06,671 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:06,672 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:06,672 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-07-21 20:18:06,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:18:06,725 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 0 case distinctions, treesize of input 40 treesize of output 25 [2020-07-21 20:18:06,726 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:06,736 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:06,738 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 20:18:06,738 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:31 [2020-07-21 20:18:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:18:06,782 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 30 treesize of output 10 [2020-07-21 20:18:06,783 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:06,804 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:06,805 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 20:18:06,805 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:7 [2020-07-21 20:18:06,822 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:18:06,829 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:18:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:18:06,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:06,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:18:17,005 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 94 [2020-07-21 20:18:17,006 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:17,062 INFO L624 ElimStorePlain]: treesize reduction 40, result has 45.9 percent of original size [2020-07-21 20:18:17,063 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2020-07-21 20:18:17,064 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:17 [2020-07-21 20:18:17,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:18:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:18:17,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772548026] [2020-07-21 20:18:17,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:17,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-21 20:18:17,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959127847] [2020-07-21 20:18:17,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 20:18:17,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:17,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 20:18:17,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=310, Unknown=8, NotChecked=0, Total=380 [2020-07-21 20:18:17,180 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 20 states. [2020-07-21 20:18:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:17,637 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-07-21 20:18:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 20:18:17,639 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-07-21 20:18:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:17,640 INFO L225 Difference]: With dead ends: 64 [2020-07-21 20:18:17,641 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 20:18:17,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=99, Invalid=493, Unknown=8, NotChecked=0, Total=600 [2020-07-21 20:18:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 20:18:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-07-21 20:18:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 20:18:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-07-21 20:18:17,648 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-07-21 20:18:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:17,649 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-07-21 20:18:17,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 20:18:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-07-21 20:18:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 20:18:17,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:17,650 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-07-21 20:18:17,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:17,856 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-07-21 20:18:17,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:17,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716656442] [2020-07-21 20:18:17,858 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 20:18:17,911 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:17,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:17,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 20:18:17,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:18:17,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:18:18,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716656442] [2020-07-21 20:18:18,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:18,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-21 20:18:18,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511210287] [2020-07-21 20:18:18,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 20:18:18,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:18,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 20:18:18,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:18:18,039 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2020-07-21 20:18:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:18,194 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-07-21 20:18:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 20:18:18,194 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-07-21 20:18:18,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:18,195 INFO L225 Difference]: With dead ends: 66 [2020-07-21 20:18:18,196 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 20:18:18,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-07-21 20:18:18,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 20:18:18,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-07-21 20:18:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 20:18:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-21 20:18:18,210 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-07-21 20:18:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:18,211 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-21 20:18:18,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 20:18:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-21 20:18:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 20:18:18,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:18,216 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 20:18:18,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:18,430 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:18,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:18,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-07-21 20:18:18,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:18,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496748538] [2020-07-21 20:18:18,431 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:18,502 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:18,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:18:18,503 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:18:18,522 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:18,547 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:18:18,547 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:18:18,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:18,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:18:18 BoogieIcfgContainer [2020-07-21 20:18:18,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:18:18,834 INFO L168 Benchmark]: Toolchain (without parser) took 15403.75 ms. Allocated memory was 144.7 MB in the beginning and 248.0 MB in the end (delta: 103.3 MB). Free memory was 101.3 MB in the beginning and 212.0 MB in the end (delta: -110.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:18:18,837 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 20:18:18,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.18 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 100.9 MB in the beginning and 181.4 MB in the end (delta: -80.5 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:18,839 INFO L168 Benchmark]: Boogie Preprocessor took 43.56 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 179.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:18,841 INFO L168 Benchmark]: RCFGBuilder took 411.73 ms. Allocated memory is still 202.4 MB. Free memory was 179.0 MB in the beginning and 162.0 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:18,842 INFO L168 Benchmark]: TraceAbstraction took 14549.83 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 161.4 MB in the beginning and 212.0 MB in the end (delta: -50.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:18:18,849 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 392.18 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 100.9 MB in the beginning and 181.4 MB in the end (delta: -80.5 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.56 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 179.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.73 ms. Allocated memory is still 202.4 MB. Free memory was 179.0 MB in the beginning and 162.0 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14549.83 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 161.4 MB in the beginning and 212.0 MB in the end (delta: -50.6 MB). There was no memory consumed. 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)=5, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=3] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=3] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=3] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=3] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=3, sum={2:0}] [L29] COND TRUE i