/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/ifeqn3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:37:12,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:37:12,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:37:12,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:37:12,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:37:12,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:37:12,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:37:12,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:37:12,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:37:12,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:37:12,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:37:12,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:37:12,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:37:12,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:37:12,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:37:12,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:37:12,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:37:12,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:37:12,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:37:12,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:37:12,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:37:12,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:37:12,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:37:12,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:37:12,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:37:12,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:37:12,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:37:12,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:37:12,332 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 17:37:12,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:37:12,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:37:12,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:37:12,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:37:12,352 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:37:12,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:37:12,353 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:37:12,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:37:12,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:37:12,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:37:12,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:37:12,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:37:12,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:37:12,354 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:37:12,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:37:12,354 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:37:12,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:37:12,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:37:12,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:37:12,355 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:37:12,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:37:12,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:37:12,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:37:12,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:37:12,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:37:12,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:37:12,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:12,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:37:12,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:37:12,357 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 17:37:12,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:37:12,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:37:12,720 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:37:12,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:37:12,723 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:37:12,725 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-20 17:37:12,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e1fe258d/fd0eddc202804b20aa04de60b1158c91/FLAG3255456a3 [2020-07-20 17:37:13,398 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:37:13,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-20 17:37:13,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e1fe258d/fd0eddc202804b20aa04de60b1158c91/FLAG3255456a3 [2020-07-20 17:37:13,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e1fe258d/fd0eddc202804b20aa04de60b1158c91 [2020-07-20 17:37:13,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:37:13,720 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:37:13,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:37:13,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:37:13,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:37:13,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:37:13" (1/1) ... [2020-07-20 17:37:13,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a14395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:13, skipping insertion in model container [2020-07-20 17:37:13,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:37:13" (1/1) ... [2020-07-20 17:37:13,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:37:13,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:37:13,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:37:13,978 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:37:14,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:37:14,023 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:37:14,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:14 WrapperNode [2020-07-20 17:37:14,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:37:14,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:37:14,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:37:14,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:37:14,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:14" (1/1) ... [2020-07-20 17:37:14,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:14" (1/1) ... [2020-07-20 17:37:14,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:14" (1/1) ... [2020-07-20 17:37:14,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:14" (1/1) ... [2020-07-20 17:37:14,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:14" (1/1) ... [2020-07-20 17:37:14,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:14" (1/1) ... [2020-07-20 17:37:14,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:14" (1/1) ... [2020-07-20 17:37:14,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:37:14,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:37:14,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:37:14,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:37:14,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:14" (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 17:37:14,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:37:14,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:37:14,251 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:37:14,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:37:14,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:37:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:37:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:37:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:37:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:37:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:37:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:37:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:37:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:37:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:37:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:37:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:37:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:37:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:37:14,664 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:37:14,665 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 17:37:14,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:37:14 BoogieIcfgContainer [2020-07-20 17:37:14,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:37:14,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:37:14,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:37:14,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:37:14,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:37:13" (1/3) ... [2020-07-20 17:37:14,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34218ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:37:14, skipping insertion in model container [2020-07-20 17:37:14,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:14" (2/3) ... [2020-07-20 17:37:14,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34218ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:37:14, skipping insertion in model container [2020-07-20 17:37:14,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:37:14" (3/3) ... [2020-07-20 17:37:14,680 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-07-20 17:37:14,693 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:37:14,701 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:37:14,715 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:37:14,742 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:37:14,742 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:37:14,743 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:37:14,743 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:37:14,743 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:37:14,744 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:37:14,744 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:37:14,744 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:37:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 17:37:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:37:14,773 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:14,774 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 17:37:14,775 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:14,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-20 17:37:14,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:14,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396345667] [2020-07-20 17:37:14,796 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 17:37:14,947 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:37:14,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:14,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:37:14,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:14,984 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 17:37:14,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:37:14,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396345667] [2020-07-20 17:37:14,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:37:14,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:37:14,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078142415] [2020-07-20 17:37:14,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:37:14,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:15,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:37:15,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:37:15,016 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-20 17:37:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:15,049 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-20 17:37:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:37:15,051 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 17:37:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:15,062 INFO L225 Difference]: With dead ends: 62 [2020-07-20 17:37:15,062 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 17:37:15,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:37:15,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 17:37:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 17:37:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 17:37:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-20 17:37:15,119 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-20 17:37:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:15,120 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-20 17:37:15,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:37:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-20 17:37:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:37:15,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:15,122 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 17:37:15,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:15,337 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-20 17:37:15,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:15,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541680190] [2020-07-20 17:37:15,340 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 17:37:15,418 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:37:15,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:15,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:37:15,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:15,475 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 17:37:15,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:37:15,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541680190] [2020-07-20 17:37:15,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:37:15,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:37:15,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160530100] [2020-07-20 17:37:15,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:37:15,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:15,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:37:15,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:37:15,481 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-20 17:37:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:15,589 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-20 17:37:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:37:15,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 17:37:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:15,593 INFO L225 Difference]: With dead ends: 56 [2020-07-20 17:37:15,593 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 17:37:15,595 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 17:37:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 17:37:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-20 17:37:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 17:37:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 17:37:15,609 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-20 17:37:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:15,609 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 17:37:15,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:37:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 17:37:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:37:15,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:15,611 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 17:37:15,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:15,827 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:15,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:15,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-20 17:37:15,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:15,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877323098] [2020-07-20 17:37:15,830 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 17:37:15,890 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:37:15,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:15,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 17:37:15,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:15,984 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 17:37:15,985 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:37:16,000 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:37:16,001 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:37:16,001 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-20 17:37:16,087 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:37:16,088 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 17:37:16,089 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 17:37:16,110 INFO L624 ElimStorePlain]: treesize reduction 12, result has 36.8 percent of original size [2020-07-20 17:37:16,111 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 17:37:16,111 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:7 [2020-07-20 17:37:16,195 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 17:37:16,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:37:16,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:37:16,376 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 17:37:16,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877323098] [2020-07-20 17:37:16,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 17:37:16,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 13 [2020-07-20 17:37:16,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618761380] [2020-07-20 17:37:16,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:37:16,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:16,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:37:16,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:37:16,380 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-20 17:37:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:16,647 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-20 17:37:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:37:16,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 17:37:16,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:16,650 INFO L225 Difference]: With dead ends: 52 [2020-07-20 17:37:16,650 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 17:37:16,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-20 17:37:16,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 17:37:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-20 17:37:16,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 17:37:16,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-20 17:37:16,664 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-20 17:37:16,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:16,664 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-20 17:37:16,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:37:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-20 17:37:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:37:16,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:16,666 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 17:37:16,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:16,881 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:16,881 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-20 17:37:16,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:16,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904564769] [2020-07-20 17:37:16,883 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 17:37:16,939 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:37:16,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:16,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 17:37:16,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:17,035 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 17:37:17,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:37:17,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:37:17,158 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 17:37:17,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904564769] [2020-07-20 17:37:17,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:37:17,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2020-07-20 17:37:17,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860026483] [2020-07-20 17:37:17,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 17:37:17,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:17,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 17:37:17,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:37:17,165 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 13 states. [2020-07-20 17:37:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:17,534 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2020-07-20 17:37:17,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 17:37:17,535 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-07-20 17:37:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:17,537 INFO L225 Difference]: With dead ends: 111 [2020-07-20 17:37:17,537 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 17:37:17,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2020-07-20 17:37:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 17:37:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 51. [2020-07-20 17:37:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 17:37:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-07-20 17:37:17,576 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 28 [2020-07-20 17:37:17,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:17,577 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-07-20 17:37:17,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 17:37:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-07-20 17:37:17,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 17:37:17,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:17,580 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 17:37:17,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:17,795 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:17,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:17,796 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-20 17:37:17,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:17,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509880084] [2020-07-20 17:37:17,797 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 17:37:18,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:37:18,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:18,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:37:18,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:19,045 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 17:37:19,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:37:19,102 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 17:37:19,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509880084] [2020-07-20 17:37:19,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:37:19,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 17:37:19,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531082665] [2020-07-20 17:37:19,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:37:19,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:19,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:37:19,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:37:19,105 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 9 states. [2020-07-20 17:37:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:19,305 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-07-20 17:37:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:37:19,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-07-20 17:37:19,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:19,308 INFO L225 Difference]: With dead ends: 93 [2020-07-20 17:37:19,308 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 17:37:19,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:37:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 17:37:19,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-20 17:37:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 17:37:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-20 17:37:19,330 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-20 17:37:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:19,331 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-20 17:37:19,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:37:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-20 17:37:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 17:37:19,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:19,334 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 17:37:19,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:19,555 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:19,556 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-20 17:37:19,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:19,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896508549] [2020-07-20 17:37:19,558 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 17:37:19,651 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:37:19,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:19,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 17:37:19,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:19,672 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-20 17:37:19,673 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:37:19,682 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:37:19,683 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:37:19,683 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-07-20 17:37:19,709 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 17:37:19,710 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:37:19,717 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:37:19,718 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:37:19,718 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-20 17:37:19,815 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-07-20 17:37:19,816 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 62 [2020-07-20 17:37:19,818 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:37:19,854 INFO L624 ElimStorePlain]: treesize reduction 32, result has 53.6 percent of original size [2020-07-20 17:37:19,855 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:37:19,855 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-07-20 17:37:19,939 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-20 17:37:19,939 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2020-07-20 17:37:19,941 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:37:19,953 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:37:19,954 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:37:19,954 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:34 [2020-07-20 17:37:20,041 INFO L350 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2020-07-20 17:37:20,041 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 44 [2020-07-20 17:37:20,043 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:37:20,068 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:37:20,070 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 17:37:20,071 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:48 [2020-07-20 17:37:20,472 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-07-20 17:37:20,473 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 44 [2020-07-20 17:37:20,474 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:37:20,491 INFO L624 ElimStorePlain]: treesize reduction 26, result has 29.7 percent of original size [2020-07-20 17:37:20,492 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 17:37:20,493 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:7 [2020-07-20 17:37:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:37:20,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:37:20,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:37:20,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:37:23,419 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 17:37:29,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896508549] [2020-07-20 17:37:29,260 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-07-20 17:37:29,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:37:29,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-20 17:37:29,261 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-20 17:37:29,261 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:37:29,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:29,488 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-20 17:37:29,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:37:29 BoogieIcfgContainer [2020-07-20 17:37:29,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:37:29,491 INFO L168 Benchmark]: Toolchain (without parser) took 15773.43 ms. Allocated memory was 145.2 MB in the beginning and 248.5 MB in the end (delta: 103.3 MB). Free memory was 102.3 MB in the beginning and 156.4 MB in the end (delta: -54.1 MB). Peak memory consumption was 49.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:29,492 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 17:37:29,492 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.52 ms. Allocated memory is still 145.2 MB. Free memory was 101.9 MB in the beginning and 91.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:29,493 INFO L168 Benchmark]: Boogie Preprocessor took 147.71 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 91.0 MB in the beginning and 181.3 MB in the end (delta: -90.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:29,494 INFO L168 Benchmark]: RCFGBuilder took 496.58 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 163.2 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:29,494 INFO L168 Benchmark]: TraceAbstraction took 14817.85 ms. Allocated memory was 202.9 MB in the beginning and 248.5 MB in the end (delta: 45.6 MB). Free memory was 162.5 MB in the beginning and 156.4 MB in the end (delta: 6.1 MB). Peak memory consumption was 51.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:29,498 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.52 ms. Allocated memory is still 145.2 MB. Free memory was 101.9 MB in the beginning and 91.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.71 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 91.0 MB in the beginning and 181.3 MB in the end (delta: -90.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 496.58 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 163.2 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14817.85 ms. Allocated memory was 202.9 MB in the beginning and 248.5 MB in the end (delta: 45.6 MB). Free memory was 162.5 MB in the beginning and 156.4 MB in the end (delta: 6.1 MB). Peak memory consumption was 51.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 [L29] COND TRUE i