/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:14:47,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:14:47,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:14:47,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:14:47,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:14:47,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:14:47,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:14:47,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:14:47,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:14:47,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:14:47,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:14:47,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:14:47,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:14:47,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:14:47,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:14:47,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:14:47,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:14:47,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:14:47,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:14:47,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:14:47,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:14:47,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:14:47,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:14:47,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:14:47,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:14:47,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:14:47,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:14:47,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:14:47,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 14:14:47,880 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:14:47,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:14:47,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:14:47,882 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:14:47,882 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:14:47,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:14:47,882 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:14:47,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:14:47,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:14:47,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:14:47,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:14:47,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:14:47,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:14:47,884 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:14:47,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:14:47,884 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:14:47,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:14:47,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:14:47,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:14:47,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:14:47,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:14:47,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:14:47,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:14:47,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:14:47,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:14:47,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:14:47,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:47,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:14:47,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:14:47,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 14:14:48,220 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:14:48,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:14:48,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:14:48,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:14:48,248 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:14:48,248 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifcompf.c [2020-07-20 14:14:48,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec50922d5/1166cea66e8442c7819a74a31987555b/FLAG07cbccb6c [2020-07-20 14:14:48,847 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:14:48,848 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifcompf.c [2020-07-20 14:14:48,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec50922d5/1166cea66e8442c7819a74a31987555b/FLAG07cbccb6c [2020-07-20 14:14:49,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec50922d5/1166cea66e8442c7819a74a31987555b [2020-07-20 14:14:49,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:14:49,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:14:49,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:14:49,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:14:49,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:14:49,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:49" (1/1) ... [2020-07-20 14:14:49,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@376f73c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:49, skipping insertion in model container [2020-07-20 14:14:49,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:49" (1/1) ... [2020-07-20 14:14:49,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:14:49,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:14:49,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:14:49,490 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:14:49,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:14:49,629 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:14:49,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:49 WrapperNode [2020-07-20 14:14:49,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:14:49,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:14:49,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:14:49,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:14:49,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:49" (1/1) ... [2020-07-20 14:14:49,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:49" (1/1) ... [2020-07-20 14:14:49,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:49" (1/1) ... [2020-07-20 14:14:49,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:49" (1/1) ... [2020-07-20 14:14:49,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:49" (1/1) ... [2020-07-20 14:14:49,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:49" (1/1) ... [2020-07-20 14:14:49,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:49" (1/1) ... [2020-07-20 14:14:49,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:14:49,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:14:49,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:14:49,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:14:49,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:14:49,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:14:49,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:14:49,754 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:14:49,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:14:49,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:14:49,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:14:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:14:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:14:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:14:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:14:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 14:14:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:14:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 14:14:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:14:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:14:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:14:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:14:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:14:50,118 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:14:50,118 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 14:14:50,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:50 BoogieIcfgContainer [2020-07-20 14:14:50,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:14:50,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:14:50,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:14:50,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:14:50,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:14:49" (1/3) ... [2020-07-20 14:14:50,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb9913f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:50, skipping insertion in model container [2020-07-20 14:14:50,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:49" (2/3) ... [2020-07-20 14:14:50,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb9913f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:50, skipping insertion in model container [2020-07-20 14:14:50,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:50" (3/3) ... [2020-07-20 14:14:50,140 INFO L109 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2020-07-20 14:14:50,156 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:14:50,167 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:14:50,188 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:14:50,230 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:14:50,230 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:14:50,230 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:14:50,231 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:14:50,231 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:14:50,231 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:14:50,232 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:14:50,232 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:14:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 14:14:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 14:14:50,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:50,271 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] [2020-07-20 14:14:50,272 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:50,284 INFO L82 PathProgramCache]: Analyzing trace with hash -794599326, now seen corresponding path program 1 times [2020-07-20 14:14:50,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:50,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409962268] [2020-07-20 14:14:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:50,414 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:14:50,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:50,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:50,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:14:50,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:50,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409962268] [2020-07-20 14:14:50,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:50,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 14:14:50,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362290366] [2020-07-20 14:14:50,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 14:14:50,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:50,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 14:14:50,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:14:50,546 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-07-20 14:14:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:50,713 INFO L93 Difference]: Finished difference Result 87 states and 124 transitions. [2020-07-20 14:14:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 14:14:50,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-20 14:14:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:50,728 INFO L225 Difference]: With dead ends: 87 [2020-07-20 14:14:50,729 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 14:14:50,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:14:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 14:14:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-20 14:14:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 14:14:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-07-20 14:14:50,795 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-07-20 14:14:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:50,796 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-07-20 14:14:50,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 14:14:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-07-20 14:14:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 14:14:50,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:50,798 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, 1, 1, 1, 1, 1] [2020-07-20 14:14:51,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:51,012 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:51,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1796917477, now seen corresponding path program 1 times [2020-07-20 14:14:51,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:51,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760546525] [2020-07-20 14:14:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:51,114 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:14:51,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:51,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:51,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 14:14:51,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:51,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760546525] [2020-07-20 14:14:51,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:51,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:14:51,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324761359] [2020-07-20 14:14:51,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:14:51,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:51,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:14:51,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:14:51,138 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 3 states. [2020-07-20 14:14:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:51,231 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-07-20 14:14:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:14:51,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-20 14:14:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:51,234 INFO L225 Difference]: With dead ends: 72 [2020-07-20 14:14:51,235 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 14:14:51,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:14:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 14:14:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-07-20 14:14:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 14:14:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-20 14:14:51,246 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 33 [2020-07-20 14:14:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:51,246 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-20 14:14:51,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:14:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-20 14:14:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 14:14:51,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:51,248 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, 1, 1, 1, 1, 1] [2020-07-20 14:14:51,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:51,463 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:51,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1817991449, now seen corresponding path program 1 times [2020-07-20 14:14:51,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:51,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308902298] [2020-07-20 14:14:51,466 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