/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 2 -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 [2020-07-21 16:41:28,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:41:28,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:41:28,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:41:28,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:41:28,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:41:28,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:41:28,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:41:28,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:41:28,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:41:28,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:41:28,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:41:28,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:41:28,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:41:28,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:41:28,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:41:28,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:41:28,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:41:28,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:41:28,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:41:28,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:41:28,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:41:28,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:41:28,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:41:28,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:41:28,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:41:28,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:41:28,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:41:28,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:41:28,419 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:41:28,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:41:28,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:41:28,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:41:28,421 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:41:28,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:41:28,422 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:41:28,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:41:28,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:41:28,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:41:28,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:41:28,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:41:28,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:41:28,425 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:41:28,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:41:28,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:41:28,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:41:28,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:41:28,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:41:28,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:41:28,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:41:28,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:41:28,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:41:28,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:41:28,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:41:28,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:41:28,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:28,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:41:28,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:41:28,428 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 -> 2 [2020-07-21 16:41:28,730 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:41:28,749 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:41:28,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:41:28,755 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:41:28,757 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:41:28,758 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-21 16:41:28,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ef78356c/f3787f41206b41f2a5b8b3037a4d4690/FLAG016bc31ff [2020-07-21 16:41:29,307 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:41:29,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-21 16:41:29,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ef78356c/f3787f41206b41f2a5b8b3037a4d4690/FLAG016bc31ff [2020-07-21 16:41:29,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ef78356c/f3787f41206b41f2a5b8b3037a4d4690 [2020-07-21 16:41:29,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:41:29,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:41:29,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:41:29,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:41:29,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:41:29,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:41:29" (1/1) ... [2020-07-21 16:41:29,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c20f81a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:29, skipping insertion in model container [2020-07-21 16:41:29,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:41:29" (1/1) ... [2020-07-21 16:41:29,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:41:29,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:41:29,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:41:29,953 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:41:29,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:41:29,990 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:41:29,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:29 WrapperNode [2020-07-21 16:41:29,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:41:29,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:41:29,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:41:29,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:41:30,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:29" (1/1) ... [2020-07-21 16:41:30,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:29" (1/1) ... [2020-07-21 16:41:30,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:29" (1/1) ... [2020-07-21 16:41:30,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:29" (1/1) ... [2020-07-21 16:41:30,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:29" (1/1) ... [2020-07-21 16:41:30,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:29" (1/1) ... [2020-07-21 16:41:30,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:29" (1/1) ... [2020-07-21 16:41:30,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:41:30,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:41:30,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:41:30,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:41:30,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:41:30,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:41:30,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:41:30,178 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:41:30,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:41:30,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:41:30,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:41:30,179 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:41:30,179 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:41:30,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:41:30,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:41:30,179 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:41:30,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:41:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:41:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:41:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:41:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:41:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:41:30,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:41:30,499 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:41:30,499 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 16:41:30,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:41:30 BoogieIcfgContainer [2020-07-21 16:41:30,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:41:30,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:41:30,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:41:30,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:41:30,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:41:29" (1/3) ... [2020-07-21 16:41:30,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5827f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:41:30, skipping insertion in model container [2020-07-21 16:41:30,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:29" (2/3) ... [2020-07-21 16:41:30,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5827f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:41:30, skipping insertion in model container [2020-07-21 16:41:30,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:41:30" (3/3) ... [2020-07-21 16:41:30,511 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-07-21 16:41:30,521 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:41:30,527 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:41:30,540 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:41:30,559 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:41:30,559 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:41:30,559 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:41:30,559 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:41:30,560 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:41:30,560 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:41:30,560 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:41:30,560 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:41:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 16:41:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 16:41:30,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:41:30,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:41:30,582 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:41:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:41:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-21 16:41:30,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:41:30,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406033996] [2020-07-21 16:41:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:30,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:41:30,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:41:30,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:41:30,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:41:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:41:30,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:41:30,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406033996] [2020-07-21 16:41:30,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:41:30,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:41:30,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532864337] [2020-07-21 16:41:30,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:41:30,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:41:30,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:41:30,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:41:30,750 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-21 16:41:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:41:30,774 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-21 16:41:30,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:41:30,776 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 16:41:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:41:30,784 INFO L225 Difference]: With dead ends: 62 [2020-07-21 16:41:30,785 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 16:41:30,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:41:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 16:41:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-21 16:41:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 16:41:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-21 16:41:30,830 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-21 16:41:30,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:41:30,831 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-21 16:41:30,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:41:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-21 16:41:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 16:41:30,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:41:30,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:41:31,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:31,047 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:41:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:41:31,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-21 16:41:31,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:41:31,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830428596] [2020-07-21 16:41:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:31,135 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:41:31,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:41:31,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:41:31,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:41:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:41:31,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:41:31,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830428596] [2020-07-21 16:41:31,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:41:31,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:41:31,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031270215] [2020-07-21 16:41:31,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:41:31,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:41:31,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:41:31,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:41:31,180 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-21 16:41:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:41:31,266 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-21 16:41:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:41:31,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-21 16:41:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:41:31,270 INFO L225 Difference]: With dead ends: 56 [2020-07-21 16:41:31,270 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 16:41:31,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:41:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 16:41:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-21 16:41:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 16:41:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-21 16:41:31,283 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-21 16:41:31,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:41:31,284 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-21 16:41:31,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:41:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-21 16:41:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 16:41:31,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:41:31,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:41:31,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:31,499 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:41:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:41:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-21 16:41:31,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:41:31,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736075374] [2020-07-21 16:41:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:31,604 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:41:31,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:41:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:41:31,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:41:31,656 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 16:41:31,657 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:41:31,662 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:41:31,663 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:41:31,663 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 16:41:31,708 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:41:31,709 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-21 16:41:31,711 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 16:41:31,724 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-21 16:41:31,725 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:41:31,725 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-21 16:41:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:41:31,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:41:31,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736075374] [2020-07-21 16:41:31,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:41:31,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 16:41:31,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299773607] [2020-07-21 16:41:31,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:41:31,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:41:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:41:31,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:41:31,761 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-21 16:41:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:41:31,937 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-21 16:41:31,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:41:31,939 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-21 16:41:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:41:31,940 INFO L225 Difference]: With dead ends: 52 [2020-07-21 16:41:31,940 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 16:41:31,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:41:31,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 16:41:31,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-21 16:41:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 16:41:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-21 16:41:31,963 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-21 16:41:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:41:31,964 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-21 16:41:31,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:41:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-21 16:41:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 16:41:31,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:41:31,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:41:32,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:32,166 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:41:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:41:32,167 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-21 16:41:32,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:41:32,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650158451] [2020-07-21 16:41:32,168 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:32,210 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:41:32,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:41:32,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:41:32,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:41:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:41:32,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:41:32,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650158451] [2020-07-21 16:41:32,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:41:32,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:41:32,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726582083] [2020-07-21 16:41:32,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:41:32,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:41:32,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:41:32,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:41:32,224 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 3 states. [2020-07-21 16:41:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:41:32,269 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-21 16:41:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:41:32,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 16:41:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:41:32,271 INFO L225 Difference]: With dead ends: 74 [2020-07-21 16:41:32,271 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 16:41:32,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:41:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 16:41:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-21 16:41:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 16:41:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-21 16:41:32,279 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-07-21 16:41:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:41:32,280 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-21 16:41:32,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:41:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-21 16:41:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 16:41:32,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:41:32,282 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:41:32,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:32,496 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:41:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:41:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-21 16:41:32,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:41:32,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745849615] [2020-07-21 16:41:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:32,545 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:41:32,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:41:32,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:41:32,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:41:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:41:32,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:41:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:41:32,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745849615] [2020-07-21 16:41:32,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:41:32,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 16:41:32,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617535434] [2020-07-21 16:41:32,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 16:41:32,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:41:32,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 16:41:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:41:32,673 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 9 states. [2020-07-21 16:41:32,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:41:32,830 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-07-21 16:41:32,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:41:32,831 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-07-21 16:41:32,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:41:32,832 INFO L225 Difference]: With dead ends: 91 [2020-07-21 16:41:32,833 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 16:41:32,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:41:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 16:41:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-21 16:41:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 16:41:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-21 16:41:32,842 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-21 16:41:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:41:32,842 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-21 16:41:32,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 16:41:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-21 16:41:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 16:41:32,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:41:32,844 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:41:33,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:33,059 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:41:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:41:33,060 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-21 16:41:33,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:41:33,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133319847] [2020-07-21 16:41:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:33,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:41:33,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:41:33,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 16:41:33,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:41:33,170 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 [2020-07-21 16:41:33,171 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:41:33,176 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:41:33,176 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:41:33,177 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-07-21 16:41:33,192 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 [2020-07-21 16:41:33,193 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:41:33,202 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:41:33,202 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:41:33,202 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-21 16:41:33,286 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-07-21 16:41:33,287 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 [2020-07-21 16:41:33,289 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:41:33,316 INFO L624 ElimStorePlain]: treesize reduction 32, result has 53.6 percent of original size [2020-07-21 16:41:33,318 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:41:33,318 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:37 [2020-07-21 16:41:33,384 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-07-21 16:41:33,384 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 3 case distinctions, treesize of input 41 treesize of output 71 [2020-07-21 16:41:33,386 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:41:33,431 INFO L624 ElimStorePlain]: treesize reduction 53, result has 47.0 percent of original size [2020-07-21 16:41:33,433 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:41:33,433 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:47 [2020-07-21 16:41:33,545 INFO L350 Elim1Store]: treesize reduction 39, result has 45.8 percent of original size [2020-07-21 16:41:33,546 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 85 [2020-07-21 16:41:33,548 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:41:33,592 INFO L624 ElimStorePlain]: treesize reduction 71, result has 50.0 percent of original size [2020-07-21 16:41:33,596 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 16:41:33,597 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:71 [2020-07-21 16:41:37,991 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 16:41:40,271 INFO L350 Elim1Store]: treesize reduction 27, result has 65.8 percent of original size [2020-07-21 16:41:40,272 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 73 [2020-07-21 16:41:40,275 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-21 16:41:40,276 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:41:40,277 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:41:40,295 INFO L624 ElimStorePlain]: treesize reduction 39, result has 26.4 percent of original size [2020-07-21 16:41:40,296 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:41:40,297 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:85, output treesize:7 [2020-07-21 16:41:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:41:40,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:41:40,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:41:53,996 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~b~0.offset Int) (v_main_~i~0_41 Int)) (or (< v_main_~i~0_41 (+ c_main_~i~0 1)) (= 6 (select (select (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base (let ((.cse1 (select |c_#memory_int| c_main_~a~0.base)) (.cse2 (* v_main_~i~0_41 8))) (store .cse1 (+ c_main_~a~0.offset .cse2) (+ (select .cse1 (+ c_main_~a~0.offset .cse2 (- 8))) 3)))))) (store .cse0 c_main_~b~0.base (store (select .cse0 c_main_~b~0.base) main_~b~0.offset 1))) c_main_~a~0.base) c_main_~a~0.offset)))) is different from false [2020-07-21 16:41:54,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133319847] [2020-07-21 16:41:54,008 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-07-21 16:41:54,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:41:54,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-21 16:41:54,009 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-21 16:41:54,009 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:41:54,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:54,241 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-21 16:41:54,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:41:54 BoogieIcfgContainer [2020-07-21 16:41:54,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:41:54,243 INFO L168 Benchmark]: Toolchain (without parser) took 24505.53 ms. Allocated memory was 139.5 MB in the beginning and 246.4 MB in the end (delta: 107.0 MB). Free memory was 102.8 MB in the beginning and 206.7 MB in the end (delta: -103.9 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:41:54,243 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 139.5 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 16:41:54,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.68 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 92.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:41:54,245 INFO L168 Benchmark]: Boogie Preprocessor took 124.59 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.1 MB in the beginning and 178.8 MB in the end (delta: -86.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 16:41:54,246 INFO L168 Benchmark]: RCFGBuilder took 387.23 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 161.7 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:41:54,246 INFO L168 Benchmark]: TraceAbstraction took 23736.83 ms. Allocated memory was 201.3 MB in the beginning and 246.4 MB in the end (delta: 45.1 MB). Free memory was 161.0 MB in the beginning and 206.7 MB in the end (delta: -45.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:41:54,250 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 139.5 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.68 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 92.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.59 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.1 MB in the beginning and 178.8 MB in the end (delta: -86.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 387.23 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 161.7 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23736.83 ms. Allocated memory was 201.3 MB in the beginning and 246.4 MB in the end (delta: 45.1 MB). Free memory was 161.0 MB in the beginning and 206.7 MB in the end (delta: -45.7 MB). There was no memory consumed. 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