/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_FUNCTIONS --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 [2020-07-20 14:14:57,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:14:57,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:14:57,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:14:57,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:14:57,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:14:57,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:14:57,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:14:57,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:14:57,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:14:57,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:14:57,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:14:57,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:14:57,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:14:57,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:14:57,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:14:57,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:14:57,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:14:57,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:14:57,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:14:57,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:14:57,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:14:57,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:14:57,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:14:57,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:14:57,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:14:57,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:14:57,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:14:57,663 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 14:14:57,696 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:14:57,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:14:57,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:14:57,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:14:57,699 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:14:57,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:14:57,699 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:14:57,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:14:57,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:14:57,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:14:57,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:14:57,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:14:57,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:14:57,702 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:14:57,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:14:57,702 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:14:57,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:14:57,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:14:57,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:14:57,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:14:57,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:14:57,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:14:57,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:14:57,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:14:57,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:14:57,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:14:57,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:57,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:14:57,705 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:14:57,705 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_FUNCTIONS 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 14:14:58,005 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:14:58,026 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:14:58,029 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:14:58,031 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:14:58,038 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:14:58,039 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-20 14:14:58,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be67b0267/ce7959aa5bfc402591d1b0cddb92f6f1/FLAG38cb057af [2020-07-20 14:14:58,609 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:14:58,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-20 14:14:58,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be67b0267/ce7959aa5bfc402591d1b0cddb92f6f1/FLAG38cb057af [2020-07-20 14:14:58,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be67b0267/ce7959aa5bfc402591d1b0cddb92f6f1 [2020-07-20 14:14:58,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:14:58,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:14:58,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:14:58,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:14:58,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:14:58,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:58" (1/1) ... [2020-07-20 14:14:58,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf95c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:58, skipping insertion in model container [2020-07-20 14:14:58,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:58" (1/1) ... [2020-07-20 14:14:58,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:14:58,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:14:59,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:14:59,184 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:14:59,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:14:59,219 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:14:59,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:59 WrapperNode [2020-07-20 14:14:59,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:14:59,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:14:59,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:14:59,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:14:59,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:59" (1/1) ... [2020-07-20 14:14:59,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:59" (1/1) ... [2020-07-20 14:14:59,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:59" (1/1) ... [2020-07-20 14:14:59,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:59" (1/1) ... [2020-07-20 14:14:59,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:59" (1/1) ... [2020-07-20 14:14:59,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:59" (1/1) ... [2020-07-20 14:14:59,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:59" (1/1) ... [2020-07-20 14:14:59,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:14:59,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:14:59,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:14:59,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:14:59,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:59" (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 14:14:59,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:14:59,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:14:59,404 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:14:59,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:14:59,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:14:59,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:14:59,405 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:14:59,405 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:14:59,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:14:59,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:14:59,406 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 14:14:59,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:14:59,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 14:14:59,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:14:59,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:14:59,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:14:59,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:14:59,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:14:59,699 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:14:59,699 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 14:14:59,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:59 BoogieIcfgContainer [2020-07-20 14:14:59,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:14:59,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:14:59,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:14:59,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:14:59,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:14:58" (1/3) ... [2020-07-20 14:14:59,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287309e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:59, skipping insertion in model container [2020-07-20 14:14:59,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:59" (2/3) ... [2020-07-20 14:14:59,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287309e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:59, skipping insertion in model container [2020-07-20 14:14:59,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:59" (3/3) ... [2020-07-20 14:14:59,714 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-07-20 14:14:59,726 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:14:59,733 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:14:59,748 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:14:59,785 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:14:59,785 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:14:59,786 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:14:59,786 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:14:59,786 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:14:59,786 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:14:59,786 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:14:59,786 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:14:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 14:14:59,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 14:14:59,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:59,813 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] [2020-07-20 14:14:59,813 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:59,818 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-20 14:14:59,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:59,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007080885] [2020-07-20 14:14:59,826 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 14:14:59,943 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:14:59,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:59,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:59,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:15:00,021 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 14:15:00,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:15:00,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007080885] [2020-07-20 14:15:00,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:15:00,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 14:15:00,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714054390] [2020-07-20 14:15:00,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 14:15:00,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:15:00,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 14:15:00,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:15:00,051 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-07-20 14:15:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:15:00,211 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2020-07-20 14:15:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 14:15:00,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 14:15:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:15:00,225 INFO L225 Difference]: With dead ends: 76 [2020-07-20 14:15:00,226 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 14:15:00,230 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 [2020-07-20 14:15:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 14:15:00,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-20 14:15:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 14:15:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 14:15:00,281 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-20 14:15:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:15:00,282 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 14:15:00,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 14:15:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 14:15:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 14:15:00,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:15:00,284 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] [2020-07-20 14:15:00,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:15:00,497 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:15:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:15:00,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-20 14:15:00,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:15:00,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332425512] [2020-07-20 14:15:00,501 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 14:15:00,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:15:00,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:15:00,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 14:15:00,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:15:00,652 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 14:15:00,652 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:15:00,661 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:15:00,662 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 14:15:00,662 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-20 14:15:00,721 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:15:00,722 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 [2020-07-20 14:15:00,724 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 14:15:00,739 INFO L624 ElimStorePlain]: treesize reduction 12, result has 36.8 percent of original size [2020-07-20 14:15:00,739 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 14:15:00,740 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:7 [2020-07-20 14:15:00,781 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 14:15:00,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:15:00,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:15:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 14:15:00,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332425512] [2020-07-20 14:15:00,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 14:15:00,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 13 [2020-07-20 14:15:00,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985527843] [2020-07-20 14:15:00,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:15:00,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:15:00,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:15:00,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 14:15:00,924 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-20 14:15:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:15:01,148 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-20 14:15:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 14:15:01,149 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 14:15:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:15:01,151 INFO L225 Difference]: With dead ends: 52 [2020-07-20 14:15:01,152 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 14:15:01,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-20 14:15:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 14:15:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-20 14:15:01,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 14:15:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-20 14:15:01,165 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-20 14:15:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:15:01,165 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-20 14:15:01,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:15:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-20 14:15:01,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 14:15:01,167 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:15:01,167 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] [2020-07-20 14:15:01,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:15:01,383 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:15:01,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:15:01,384 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-20 14:15:01,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:15:01,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231736454] [2020-07-20 14:15:01,386 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 14:15:01,465 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:15:01,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:15:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:15:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:15:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 14:15:01,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:15:01,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231736454] [2020-07-20 14:15:01,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:15:01,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:15:01,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690285175] [2020-07-20 14:15:01,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:15:01,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:15:01,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:15:01,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:15:01,480 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 3 states. [2020-07-20 14:15:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:15:01,522 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-20 14:15:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:15:01,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-20 14:15:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:15:01,524 INFO L225 Difference]: With dead ends: 74 [2020-07-20 14:15:01,524 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 14:15:01,525 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 [2020-07-20 14:15:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 14:15:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-20 14:15:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 14:15:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-20 14:15:01,534 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-07-20 14:15:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:15:01,535 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-20 14:15:01,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:15:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-20 14:15:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 14:15:01,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:15:01,537 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] [2020-07-20 14:15:01,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:15:01,751 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:15:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:15:01,752 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-20 14:15:01,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:15:01,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079833532] [2020-07-20 14:15:01,755 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 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 14:15:02,786 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:15:02,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:15:02,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:15:02,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:15:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 14:15:02,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:15:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 14:15:02,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079833532] [2020-07-20 14:15:02,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:15:02,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 14:15:02,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877492171] [2020-07-20 14:15:02,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 14:15:02,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:15:02,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 14:15:02,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 14:15:02,923 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 9 states. [2020-07-20 14:15:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:15:03,157 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-07-20 14:15:03,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 14:15:03,160 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-07-20 14:15:03,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:15:03,162 INFO L225 Difference]: With dead ends: 91 [2020-07-20 14:15:03,162 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 14:15:03,164 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 [2020-07-20 14:15:03,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 14:15:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-20 14:15:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 14:15:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-20 14:15:03,177 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-20 14:15:03,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:15:03,177 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-20 14:15:03,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 14:15:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-20 14:15:03,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 14:15:03,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:15:03,179 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] [2020-07-20 14:15:03,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:15:03,394 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:15:03,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:15:03,394 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-20 14:15:03,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:15:03,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328400023] [2020-07-20 14:15:03,395 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 14:15:03,477 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:15:03,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 14:15:03,478 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:15:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 14:15:03,501 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:15:03,535 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 14:15:03,535 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 14:15:03,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:15:03,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:15:03 BoogieIcfgContainer [2020-07-20 14:15:03,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:15:03,794 INFO L168 Benchmark]: Toolchain (without parser) took 4837.96 ms. Allocated memory was 139.5 MB in the beginning and 234.9 MB in the end (delta: 95.4 MB). Free memory was 102.7 MB in the beginning and 89.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 108.9 MB. Max. memory is 7.1 GB. [2020-07-20 14:15:03,795 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 139.5 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 14:15:03,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.72 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:15:03,796 INFO L168 Benchmark]: Boogie Preprocessor took 114.42 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 92.0 MB in the beginning and 181.6 MB in the end (delta: -89.7 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:15:03,797 INFO L168 Benchmark]: RCFGBuilder took 368.97 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 163.9 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-07-20 14:15:03,798 INFO L168 Benchmark]: TraceAbstraction took 4085.79 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 163.3 MB in the beginning and 89.2 MB in the end (delta: 74.1 MB). Peak memory consumption was 105.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:15:03,802 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 139.5 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.72 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.42 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 92.0 MB in the beginning and 181.6 MB in the end (delta: -89.7 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.97 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 163.9 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4085.79 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 163.3 MB in the beginning and 89.2 MB in the end (delta: 74.1 MB). Peak memory consumption was 105.5 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