/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 [2020-07-20 17:36:31,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:36:31,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:36:31,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:36:31,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:36:31,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:36:31,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:36:31,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:36:31,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:36:31,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:36:31,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:36:31,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:36:31,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:36:31,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:36:31,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:36:31,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:36:31,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:36:31,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:36:31,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:36:31,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:36:31,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:36:31,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:36:31,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:36:31,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:36:31,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:36:31,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:36:31,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:36:31,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:36:31,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:36:31,837 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:36:31,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:36:31,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:36:31,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:36:31,840 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:36:31,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:36:31,840 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:36:31,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:36:31,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:36:31,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:36:31,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:36:31,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:36:31,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:36:31,841 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:36:31,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:36:31,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:36:31,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:36:31,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:36:31,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:36:31,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:36:31,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:36:31,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:36:31,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:36:31,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:36:31,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:36:31,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:36:31,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:31,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:36:31,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:36:31,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:36:32,243 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:36:32,261 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:36:32,266 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:36:32,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:36:32,268 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:36:32,268 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-07-20 17:36:32,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0fe1ce71/9b9b08c3c84f486aa62cbe0d9a596a5f/FLAGa7ddb988b [2020-07-20 17:36:32,783 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:36:32,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs2f.c [2020-07-20 17:36:32,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0fe1ce71/9b9b08c3c84f486aa62cbe0d9a596a5f/FLAGa7ddb988b [2020-07-20 17:36:33,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0fe1ce71/9b9b08c3c84f486aa62cbe0d9a596a5f [2020-07-20 17:36:33,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:36:33,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:36:33,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:33,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:36:33,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:36:33,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:33" (1/1) ... [2020-07-20 17:36:33,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b80807d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:33, skipping insertion in model container [2020-07-20 17:36:33,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:33" (1/1) ... [2020-07-20 17:36:33,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:36:33,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:36:33,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:33,469 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:36:33,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:33,510 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:36:33,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:33 WrapperNode [2020-07-20 17:36:33,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:33,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:36:33,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:36:33,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:36:33,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:33" (1/1) ... [2020-07-20 17:36:33,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:33" (1/1) ... [2020-07-20 17:36:33,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:33" (1/1) ... [2020-07-20 17:36:33,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:33" (1/1) ... [2020-07-20 17:36:33,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:33" (1/1) ... [2020-07-20 17:36:33,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:33" (1/1) ... [2020-07-20 17:36:33,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:33" (1/1) ... [2020-07-20 17:36:33,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:36:33,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:36:33,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:36:33,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:36:33,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:36:33,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:36:33,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:36:33,787 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:36:33,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:36:33,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:36:33,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:36:33,789 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:36:33,789 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:36:33,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:36:33,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:36:33,790 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:36:33,790 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:36:33,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:36:33,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:36:33,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:36:33,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:36:33,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:36:33,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:36:33,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:36:34,097 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:36:34,098 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 17:36:34,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:34 BoogieIcfgContainer [2020-07-20 17:36:34,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:36:34,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:36:34,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:36:34,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:36:34,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:36:33" (1/3) ... [2020-07-20 17:36:34,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbaa4ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:34, skipping insertion in model container [2020-07-20 17:36:34,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:33" (2/3) ... [2020-07-20 17:36:34,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbaa4ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:34, skipping insertion in model container [2020-07-20 17:36:34,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:34" (3/3) ... [2020-07-20 17:36:34,122 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-07-20 17:36:34,148 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:36:34,162 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:36:34,199 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:36:34,227 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:36:34,227 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:36:34,228 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:36:34,228 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:36:34,228 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:36:34,228 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:36:34,229 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:36:34,229 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:36:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 17:36:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 17:36:34,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:34,260 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] [2020-07-20 17:36:34,260 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:34,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-20 17:36:34,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:34,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051104980] [2020-07-20 17:36:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:34,391 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:34,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:34,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:36:34,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:34,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:34,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051104980] [2020-07-20 17:36:34,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:34,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:36:34,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368540763] [2020-07-20 17:36:34,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:36:34,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:34,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:36:34,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:36:34,453 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-07-20 17:36:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:34,493 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-20 17:36:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:36:34,494 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 17:36:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:34,504 INFO L225 Difference]: With dead ends: 56 [2020-07-20 17:36:34,504 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 17:36:34,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:36:34,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 17:36:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-20 17:36:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 17:36:34,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-20 17:36:34,549 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-07-20 17:36:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:34,549 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-20 17:36:34,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:36:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-20 17:36:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 17:36:34,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:34,551 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] [2020-07-20 17:36:34,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:34,753 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:34,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-07-20 17:36:34,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:34,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407444884] [2020-07-20 17:36:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:34,864 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:34,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:34,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:34,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:34,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:34,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407444884] [2020-07-20 17:36:34,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:34,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:36:34,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192326367] [2020-07-20 17:36:34,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:36:34,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:34,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:36:34,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:34,922 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-07-20 17:36:35,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:35,006 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-20 17:36:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:36:35,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 17:36:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:35,009 INFO L225 Difference]: With dead ends: 42 [2020-07-20 17:36:35,009 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 17:36:35,010 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 [2020-07-20 17:36:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 17:36:35,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-20 17:36:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 17:36:35,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 17:36:35,019 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-07-20 17:36:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:35,019 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 17:36:35,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:36:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 17:36:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:36:35,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:35,021 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] [2020-07-20 17:36:35,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:35,236 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:35,238 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-20 17:36:35,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:35,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154501802] [2020-07-20 17:36:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:35,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:36:35,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:35,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:36:35,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:35,374 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 [2020-07-20 17:36:35,374 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:36:35,382 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:36:35,383 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:36:35,384 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-20 17:36:35,411 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 [2020-07-20 17:36:35,412 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:36:35,418 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:36:35,418 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:36:35,419 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-07-20 17:36:35,436 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:36:35,442 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:36:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:35,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:35,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:36:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:35,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154501802] [2020-07-20 17:36:35,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:35,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-20 17:36:35,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498219299] [2020-07-20 17:36:35,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 17:36:35,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:35,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 17:36:35,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:36:35,595 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 12 states. [2020-07-20 17:36:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:35,814 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-20 17:36:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:36:35,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-07-20 17:36:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:35,816 INFO L225 Difference]: With dead ends: 37 [2020-07-20 17:36:35,816 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 17:36:35,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-07-20 17:36:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 17:36:35,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-20 17:36:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 17:36:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 17:36:35,825 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-07-20 17:36:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:35,825 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 17:36:35,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 17:36:35,825 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 17:36:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:36:35,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:35,827 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] [2020-07-20 17:36:36,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:36,040 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:36,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-07-20 17:36:36,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:36,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111115329] [2020-07-20 17:36:36,042 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 [2020-07-20 17:36:36,096 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:36,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:36,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:36:36,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:36,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:36,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111115329] [2020-07-20 17:36:36,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:36,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2020-07-20 17:36:36,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613290421] [2020-07-20 17:36:36,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 17:36:36,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:36,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 17:36:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:36:36,331 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 13 states. [2020-07-20 17:36:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:36,578 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-07-20 17:36:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 17:36:36,579 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-07-20 17:36:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:36,580 INFO L225 Difference]: With dead ends: 61 [2020-07-20 17:36:36,581 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 17:36:36,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 17:36:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 17:36:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 17:36:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 17:36:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-07-20 17:36:36,589 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 27 [2020-07-20 17:36:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:36,590 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-07-20 17:36:36,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 17:36:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-07-20 17:36:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 17:36:36,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:36,592 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] [2020-07-20 17:36:36,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:36,805 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-07-20 17:36:36,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:36,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304247940] [2020-07-20 17:36:36,808 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 [2020-07-20 17:36:36,885 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:36:36,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:36,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 17:36:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:36,941 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 [2020-07-20 17:36:36,942 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:36:36,949 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:36:36,950 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:36:36,950 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-07-20 17:36:36,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:36:36,979 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 [2020-07-20 17:36:36,980 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:36:36,992 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:36:36,992 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:36:36,993 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-07-20 17:36:37,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:36:37,063 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 [2020-07-20 17:36:37,064 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:36:37,077 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:36:37,080 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 17:36:37,081 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:31 [2020-07-20 17:36:37,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:36:37,131 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 [2020-07-20 17:36:37,132 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:36:37,138 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:36:37,139 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:36:37,139 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:7 [2020-07-20 17:36:37,155 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:36:37,156 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:36:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:37,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:37,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:36:39,254 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 [2020-07-20 17:36:39,255 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:36:39,306 INFO L624 ElimStorePlain]: treesize reduction 40, result has 45.9 percent of original size [2020-07-20 17:36:39,308 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. [2020-07-20 17:36:39,309 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:17 [2020-07-20 17:36:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:39,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304247940] [2020-07-20 17:36:39,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:39,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-20 17:36:39,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000669392] [2020-07-20 17:36:39,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 17:36:39,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:39,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 17:36:39,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=305, Unknown=2, NotChecked=0, Total=380 [2020-07-20 17:36:39,416 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 20 states. [2020-07-20 17:36:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:39,963 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-07-20 17:36:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 17:36:39,964 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-07-20 17:36:39,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:39,965 INFO L225 Difference]: With dead ends: 64 [2020-07-20 17:36:39,966 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 17:36:39,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=124, Invalid=524, Unknown=2, NotChecked=0, Total=650 [2020-07-20 17:36:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 17:36:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-07-20 17:36:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 17:36:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-07-20 17:36:39,973 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-07-20 17:36:39,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:39,974 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-07-20 17:36:39,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 17:36:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-07-20 17:36:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 17:36:39,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:39,975 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] [2020-07-20 17:36:40,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:40,180 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:40,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-07-20 17:36:40,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:40,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062138008] [2020-07-20 17:36:40,182 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 [2020-07-20 17:36:40,237 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:40,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:40,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:36:40,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:40,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:40,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062138008] [2020-07-20 17:36:40,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:40,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-20 17:36:40,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093331078] [2020-07-20 17:36:40,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 17:36:40,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:40,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 17:36:40,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:36:40,366 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2020-07-20 17:36:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:40,546 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-07-20 17:36:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 17:36:40,547 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-07-20 17:36:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:40,548 INFO L225 Difference]: With dead ends: 66 [2020-07-20 17:36:40,548 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 17:36:40,549 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 [2020-07-20 17:36:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 17:36:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-07-20 17:36:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 17:36:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-20 17:36:40,556 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-07-20 17:36:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:40,556 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-20 17:36:40,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 17:36:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-20 17:36:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 17:36:40,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:40,558 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] [2020-07-20 17:36:40,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:40,761 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:40,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-07-20 17:36:40,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:40,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846076898] [2020-07-20 17:36:40,763 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 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 [2020-07-20 17:36:40,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:36:40,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:36:40,824 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:36:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:36:40,845 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:36:40,888 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:36:40,888 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:36:41,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:41,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:36:41 BoogieIcfgContainer [2020-07-20 17:36:41,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:36:41,153 INFO L168 Benchmark]: Toolchain (without parser) took 7932.29 ms. Allocated memory was 146.8 MB in the beginning and 244.3 MB in the end (delta: 97.5 MB). Free memory was 103.7 MB in the beginning and 148.0 MB in the end (delta: -44.3 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:41,153 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:36:41,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.87 ms. Allocated memory is still 146.8 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:41,155 INFO L168 Benchmark]: Boogie Preprocessor took 191.26 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 92.9 MB in the beginning and 179.7 MB in the end (delta: -86.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:41,155 INFO L168 Benchmark]: RCFGBuilder took 398.43 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 163.4 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:41,156 INFO L168 Benchmark]: TraceAbstraction took 7043.75 ms. Allocated memory was 202.4 MB in the beginning and 244.3 MB in the end (delta: 41.9 MB). Free memory was 162.8 MB in the beginning and 148.0 MB in the end (delta: 14.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:41,165 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.87 ms. Allocated memory is still 146.8 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 191.26 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 92.9 MB in the beginning and 179.7 MB in the end (delta: -86.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 398.43 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 163.4 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7043.75 ms. Allocated memory was 202.4 MB in the beginning and 244.3 MB in the end (delta: 41.9 MB). Free memory was 162.8 MB in the beginning and 148.0 MB in the end (delta: 14.8 MB). Peak memory consumption was 56.8 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)=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