/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:08:58,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:08:58,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:08:58,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:08:58,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:08:58,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:08:58,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:08:58,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:08:58,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:08:58,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:08:58,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:08:58,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:08:58,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:08:58,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:08:58,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:08:58,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:08:58,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:08:58,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:08:58,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:08:58,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:08:58,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:08:58,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:08:58,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:08:58,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:08:58,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:08:58,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:08:58,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:08:58,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:08:58,928 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 23:08:58,943 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:08:58,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:08:58,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:08:58,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:08:58,945 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:08:58,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:08:58,946 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:08:58,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:08:58,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:08:58,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:08:58,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:08:58,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:08:58,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:08:58,947 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:08:58,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:08:58,947 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:08:58,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:08:58,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:08:58,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:08:58,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:08:58,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:08:58,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:08:58,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:08:58,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:08:58,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:08:58,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:08:58,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:58,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:08:58,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:08:58,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:08:59,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:08:59,262 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:08:59,266 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:08:59,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:08:59,270 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:08:59,272 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-21 23:08:59,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c51efdc/ff31a13c635a419a920bcb145d458f28/FLAG92590dad8 [2020-07-21 23:08:59,888 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:08:59,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-21 23:08:59,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c51efdc/ff31a13c635a419a920bcb145d458f28/FLAG92590dad8 [2020-07-21 23:09:00,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c51efdc/ff31a13c635a419a920bcb145d458f28 [2020-07-21 23:09:00,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:09:00,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:09:00,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:09:00,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:09:00,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:09:00,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:09:00" (1/1) ... [2020-07-21 23:09:00,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5957ebad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:00, skipping insertion in model container [2020-07-21 23:09:00,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:09:00" (1/1) ... [2020-07-21 23:09:00,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:09:00,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:09:00,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:09:00,486 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:09:00,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:09:00,528 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:09:00,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:00 WrapperNode [2020-07-21 23:09:00,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:09:00,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:09:00,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:09:00,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:09:00,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:00" (1/1) ... [2020-07-21 23:09:00,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:00" (1/1) ... [2020-07-21 23:09:00,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:00" (1/1) ... [2020-07-21 23:09:00,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:00" (1/1) ... [2020-07-21 23:09:00,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:00" (1/1) ... [2020-07-21 23:09:00,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:00" (1/1) ... [2020-07-21 23:09:00,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:00" (1/1) ... [2020-07-21 23:09:00,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:09:00,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:09:00,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:09:00,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:09:00,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:00" (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 23:09:00,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:09:00,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:09:00,719 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:09:00,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:09:00,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:09:00,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:09:00,720 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:09:00,720 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:09:00,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:09:00,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:09:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 23:09:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:09:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 23:09:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 23:09:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 23:09:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:09:00,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:09:00,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 23:09:01,059 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:09:01,060 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 23:09:01,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:09:01 BoogieIcfgContainer [2020-07-21 23:09:01,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:09:01,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:09:01,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:09:01,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:09:01,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:09:00" (1/3) ... [2020-07-21 23:09:01,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c176051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:09:01, skipping insertion in model container [2020-07-21 23:09:01,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:00" (2/3) ... [2020-07-21 23:09:01,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c176051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:09:01, skipping insertion in model container [2020-07-21 23:09:01,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:09:01" (3/3) ... [2020-07-21 23:09:01,073 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-07-21 23:09:01,084 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:09:01,090 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:09:01,103 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:09:01,125 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:09:01,125 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:09:01,125 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:09:01,125 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:09:01,126 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:09:01,126 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:09:01,126 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:09:01,126 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:09:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 23:09:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 23:09:01,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:01,148 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 23:09:01,149 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:01,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:01,155 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-21 23:09:01,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:01,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444705060] [2020-07-21 23:09:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:01,268 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:09:01,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:09:01,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:09:01,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:09:01,296 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 23:09:01,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:09:01,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444705060] [2020-07-21 23:09:01,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:09:01,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:09:01,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209546425] [2020-07-21 23:09:01,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:09:01,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:09:01,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:09:01,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:09:01,324 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-21 23:09:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:09:01,352 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-21 23:09:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:09:01,354 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 23:09:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:09:01,363 INFO L225 Difference]: With dead ends: 62 [2020-07-21 23:09:01,364 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 23:09:01,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:09:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 23:09:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-21 23:09:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 23:09:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-21 23:09:01,409 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-21 23:09:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:09:01,410 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-21 23:09:01,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:09:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-21 23:09:01,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 23:09:01,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:01,411 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 23:09:01,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:01,624 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:01,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-21 23:09:01,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:01,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184284086] [2020-07-21 23:09:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:01,691 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:09:01,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:09:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:09:01,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:09:01,743 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 23:09:01,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:09:01,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184284086] [2020-07-21 23:09:01,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:09:01,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:09:01,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34522228] [2020-07-21 23:09:01,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:09:01,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:09:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:09:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:09:01,748 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-21 23:09:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:09:01,846 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-21 23:09:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:09:01,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-21 23:09:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:09:01,850 INFO L225 Difference]: With dead ends: 56 [2020-07-21 23:09:01,851 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 23:09:01,852 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 23:09:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 23:09:01,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-21 23:09:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 23:09:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-21 23:09:01,865 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-21 23:09:01,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:09:01,866 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-21 23:09:01,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:09:01,866 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-21 23:09:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 23:09:01,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:01,867 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 23:09:02,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:02,083 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:02,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-21 23:09:02,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:02,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209805660] [2020-07-21 23:09:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:02,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:09:02,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:09:02,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 23:09:02,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:09:02,212 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 23:09:02,213 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:09:02,217 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:09:02,218 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:09:02,218 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 23:09:02,263 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:09:02,264 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 23:09:02,265 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 23:09:02,280 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-21 23:09:02,280 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 23:09:02,281 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-21 23:09:02,316 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 23:09:02,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:09:02,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209805660] [2020-07-21 23:09:02,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:09:02,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 23:09:02,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532024030] [2020-07-21 23:09:02,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:09:02,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:09:02,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:09:02,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:09:02,320 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-21 23:09:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:09:02,495 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-21 23:09:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:09:02,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-21 23:09:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:09:02,498 INFO L225 Difference]: With dead ends: 52 [2020-07-21 23:09:02,498 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 23:09:02,499 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 23:09:02,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 23:09:02,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-21 23:09:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 23:09:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-21 23:09:02,510 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-21 23:09:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:09:02,510 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-21 23:09:02,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:09:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-21 23:09:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 23:09:02,511 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:02,512 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 23:09:02,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:02,727 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:02,728 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-21 23:09:02,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:02,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028907715] [2020-07-21 23:09:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:09:02,779 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:09:02,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:09:02,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:09:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:09:02,799 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 23:09:02,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:09:02,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028907715] [2020-07-21 23:09:02,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:09:02,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:09:02,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112286537] [2020-07-21 23:09:02,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:09:02,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:09:02,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:09:02,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:09:02,802 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 3 states. [2020-07-21 23:09:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:09:02,874 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-21 23:09:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:09:02,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 23:09:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:09:02,877 INFO L225 Difference]: With dead ends: 74 [2020-07-21 23:09:02,877 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 23:09:02,878 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 23:09:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 23:09:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-21 23:09:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 23:09:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-21 23:09:02,902 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-07-21 23:09:02,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:09:02,903 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-21 23:09:02,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:09:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-21 23:09:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 23:09:02,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:02,907 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 23:09:03,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:03,123 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:03,125 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-21 23:09:03,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:03,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785049096] [2020-07-21 23:09:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:09:03,196 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:09:03,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:09:03,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:09:03,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:09:03,257 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 23:09:03,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:09:03,311 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 23:09:03,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785049096] [2020-07-21 23:09:03,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:09:03,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 23:09:03,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738964490] [2020-07-21 23:09:03,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 23:09:03,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:09:03,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 23:09:03,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:09:03,313 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 9 states. [2020-07-21 23:09:03,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:09:03,511 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-07-21 23:09:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 23:09:03,512 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-07-21 23:09:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:09:03,513 INFO L225 Difference]: With dead ends: 91 [2020-07-21 23:09:03,513 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 23:09:03,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:09:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 23:09:03,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-21 23:09:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 23:09:03,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-21 23:09:03,524 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-21 23:09:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:09:03,524 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-21 23:09:03,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 23:09:03,524 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-21 23:09:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 23:09:03,525 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:03,526 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 23:09:03,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:03,741 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:03,742 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-21 23:09:03,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:03,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066450756] [2020-07-21 23:09:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:09:03,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:09:03,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 23:09:03,824 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:09:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 23:09:03,857 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:09:03,914 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 23:09:03,914 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 23:09:04,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:04,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:09:04 BoogieIcfgContainer [2020-07-21 23:09:04,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:09:04,183 INFO L168 Benchmark]: Toolchain (without parser) took 3946.38 ms. Allocated memory was 143.1 MB in the beginning and 229.6 MB in the end (delta: 86.5 MB). Free memory was 101.0 MB in the beginning and 106.0 MB in the end (delta: -5.0 MB). Peak memory consumption was 81.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:09:04,183 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 23:09:04,184 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.54 ms. Allocated memory is still 143.1 MB. Free memory was 100.5 MB in the beginning and 90.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:09:04,185 INFO L168 Benchmark]: Boogie Preprocessor took 122.72 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 90.2 MB in the beginning and 177.6 MB in the end (delta: -87.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 23:09:04,186 INFO L168 Benchmark]: RCFGBuilder took 411.43 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 160.4 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:09:04,187 INFO L168 Benchmark]: TraceAbstraction took 3115.15 ms. Allocated memory was 200.3 MB in the beginning and 229.6 MB in the end (delta: 29.4 MB). Free memory was 159.7 MB in the beginning and 106.0 MB in the end (delta: 53.7 MB). Peak memory consumption was 83.1 MB. Max. memory is 7.1 GB. [2020-07-21 23:09:04,191 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.54 ms. Allocated memory is still 143.1 MB. Free memory was 100.5 MB in the beginning and 90.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.72 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 90.2 MB in the beginning and 177.6 MB in the end (delta: -87.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.43 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 160.4 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3115.15 ms. Allocated memory was 200.3 MB in the beginning and 229.6 MB in the end (delta: 29.4 MB). Free memory was 159.7 MB in the beginning and 106.0 MB in the end (delta: 53.7 MB). Peak memory consumption was 83.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 VAL [\old(N)=0, a={1:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={1:0}, N=2] [L29] COND TRUE i