/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:31:29,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:31:29,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:31:29,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:31:29,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:31:29,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:31:29,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:31:29,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:31:29,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:31:29,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:31:29,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:31:29,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:31:29,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:31:29,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:31:29,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:31:29,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:31:29,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:31:29,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:31:29,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:31:29,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:31:29,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:31:29,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:31:29,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:31:29,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:31:29,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:31:29,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:31:29,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:31:29,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:31:29,203 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 14:31:29,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:31:29,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:31:29,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:31:29,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:31:29,238 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:31:29,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:31:29,239 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:31:29,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:31:29,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:31:29,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:31:29,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:31:29,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:31:29,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:31:29,242 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:31:29,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:31:29,243 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:31:29,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:31:29,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:31:29,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:31:29,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:31:29,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:31:29,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:31:29,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:31:29,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:31:29,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:31:29,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:31:29,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:29,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:31:29,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:31:29,250 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 -> 2 [2020-07-21 14:31:29,567 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:31:29,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:31:29,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:31:29,588 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:31:29,589 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:31:29,590 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-07-21 14:31:29,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5f3de704/05e3999c6c9c41839683a651830b75f1/FLAG46322bcde [2020-07-21 14:31:30,231 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:31:30,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-07-21 14:31:30,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5f3de704/05e3999c6c9c41839683a651830b75f1/FLAG46322bcde [2020-07-21 14:31:30,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5f3de704/05e3999c6c9c41839683a651830b75f1 [2020-07-21 14:31:30,575 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:31:30,578 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:31:30,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:31:30,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:31:30,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:31:30,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:31:30" (1/1) ... [2020-07-21 14:31:30,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43875ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:30, skipping insertion in model container [2020-07-21 14:31:30,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:31:30" (1/1) ... [2020-07-21 14:31:30,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:31:30,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:31:30,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:31:30,853 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:31:30,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:31:30,898 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:31:30,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:30 WrapperNode [2020-07-21 14:31:30,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:31:30,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:31:30,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:31:30,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:31:30,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:30" (1/1) ... [2020-07-21 14:31:30,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:30" (1/1) ... [2020-07-21 14:31:30,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:30" (1/1) ... [2020-07-21 14:31:30,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:30" (1/1) ... [2020-07-21 14:31:30,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:30" (1/1) ... [2020-07-21 14:31:31,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:30" (1/1) ... [2020-07-21 14:31:31,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:30" (1/1) ... [2020-07-21 14:31:31,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:31:31,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:31:31,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:31:31,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:31:31,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:30" (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 14:31:31,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:31:31,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:31:31,087 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:31:31,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:31:31,087 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:31:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:31:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:31:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:31:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:31:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:31:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:31:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:31:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:31:31,402 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:31:31,403 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 14:31:31,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:31:31 BoogieIcfgContainer [2020-07-21 14:31:31,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:31:31,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:31:31,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:31:31,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:31:31,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:31:30" (1/3) ... [2020-07-21 14:31:31,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e18bd37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:31:31, skipping insertion in model container [2020-07-21 14:31:31,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:30" (2/3) ... [2020-07-21 14:31:31,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e18bd37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:31:31, skipping insertion in model container [2020-07-21 14:31:31,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:31:31" (3/3) ... [2020-07-21 14:31:31,420 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt8.c [2020-07-21 14:31:31,434 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:31:31,446 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:31:31,466 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:31:31,495 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:31:31,495 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:31:31,495 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:31:31,495 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:31:31,496 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:31:31,496 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:31:31,496 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:31:31,496 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:31:31,519 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-21 14:31:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 14:31:31,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:31:31,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:31:31,529 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:31:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:31:31,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1078562183, now seen corresponding path program 1 times [2020-07-21 14:31:31,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:31:31,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726232606] [2020-07-21 14:31:31,549 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 14:31:31,628 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:31:31,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:31:31,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 14:31:31,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:31:31,870 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 14:31:31,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:31:31,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726232606] [2020-07-21 14:31:31,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:31:31,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 14:31:31,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075038564] [2020-07-21 14:31:31,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 14:31:31,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:31:31,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 14:31:31,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 14:31:31,900 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2020-07-21 14:31:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:31:32,194 INFO L93 Difference]: Finished difference Result 71 states and 105 transitions. [2020-07-21 14:31:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 14:31:32,196 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-21 14:31:32,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:31:32,211 INFO L225 Difference]: With dead ends: 71 [2020-07-21 14:31:32,211 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 14:31:32,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:31:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 14:31:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 14:31:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 14:31:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-07-21 14:31:32,293 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 14 [2020-07-21 14:31:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:31:32,294 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-07-21 14:31:32,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 14:31:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-07-21 14:31:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 14:31:32,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:31:32,298 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:31:32,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:32,513 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:31:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:31:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash -858115487, now seen corresponding path program 1 times [2020-07-21 14:31:32,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:31:32,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964339509] [2020-07-21 14:31:32,516 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 14:31:32,573 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:31:32,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:31:32,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-21 14:31:32,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:31:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:31:32,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:31:32,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:31:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 14:31:33,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964339509] [2020-07-21 14:31:33,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 14:31:33,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2020-07-21 14:31:33,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297227509] [2020-07-21 14:31:33,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 14:31:33,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:31:33,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 14:31:33,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-21 14:31:33,077 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 6 states. [2020-07-21 14:31:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:31:49,978 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-07-21 14:31:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 14:31:49,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-21 14:31:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:31:49,981 INFO L225 Difference]: With dead ends: 55 [2020-07-21 14:31:49,981 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 14:31:49,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:31:49,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 14:31:50,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-21 14:31:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-21 14:31:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-07-21 14:31:50,004 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 28 [2020-07-21 14:31:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:31:50,005 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-07-21 14:31:50,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:31:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-07-21 14:31:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 14:31:50,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:31:50,008 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:31:50,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:50,210 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:31:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:31:50,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1617304246, now seen corresponding path program 1 times [2020-07-21 14:31:50,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:31:50,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249453327] [2020-07-21 14:31:50,213 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