/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/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:41:08,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:41:08,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:41:08,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:41:08,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:41:08,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:41:08,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:41:08,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:41:08,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:41:08,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:41:08,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:41:08,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:41:08,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:41:08,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:41:08,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:41:08,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:41:08,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:41:08,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:41:08,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:41:08,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:41:08,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:41:08,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:41:08,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:41:08,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:41:08,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:41:08,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:41:08,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:41:08,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:41:08,285 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 13:41:08,312 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:41:08,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:41:08,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:41:08,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:41:08,315 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:41:08,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:41:08,316 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:41:08,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:41:08,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:41:08,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:41:08,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:41:08,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:41:08,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:41:08,318 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:41:08,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:41:08,319 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:41:08,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:41:08,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:41:08,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:41:08,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:41:08,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:41:08,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:41:08,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:41:08,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:41:08,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:41:08,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:41:08,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:41:08,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:41:08,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:41:08,322 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 13:41:08,611 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:41:08,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:41:08,628 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:41:08,630 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:41:08,630 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:41:08,631 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-07-21 13:41:08,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf2b6758d/e3fff86c1aa547888929b753efc5bb0f/FLAG99c31e598 [2020-07-21 13:41:09,143 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:41:09,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-07-21 13:41:09,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf2b6758d/e3fff86c1aa547888929b753efc5bb0f/FLAG99c31e598 [2020-07-21 13:41:09,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf2b6758d/e3fff86c1aa547888929b753efc5bb0f [2020-07-21 13:41:09,506 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:41:09,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:41:09,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:41:09,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:41:09,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:41:09,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:41:09" (1/1) ... [2020-07-21 13:41:09,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70024d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:09, skipping insertion in model container [2020-07-21 13:41:09,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:41:09" (1/1) ... [2020-07-21 13:41:09,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:41:09,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:41:09,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:41:09,735 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:41:09,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:41:09,773 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:41:09,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:09 WrapperNode [2020-07-21 13:41:09,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:41:09,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:41:09,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:41:09,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:41:09,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:09" (1/1) ... [2020-07-21 13:41:09,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:09" (1/1) ... [2020-07-21 13:41:09,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:09" (1/1) ... [2020-07-21 13:41:09,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:09" (1/1) ... [2020-07-21 13:41:09,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:09" (1/1) ... [2020-07-21 13:41:09,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:09" (1/1) ... [2020-07-21 13:41:09,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:09" (1/1) ... [2020-07-21 13:41:09,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:41:09,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:41:09,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:41:09,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:41:09,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:09" (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 13:41:09,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:41:09,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:41:09,981 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-21 13:41:09,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:41:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:41:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:41:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 13:41:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 13:41:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:41:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:41:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 13:41:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:41:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 13:41:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:41:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:41:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:41:10,295 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:41:10,296 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 13:41:10,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:41:10 BoogieIcfgContainer [2020-07-21 13:41:10,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:41:10,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:41:10,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:41:10,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:41:10,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:41:09" (1/3) ... [2020-07-21 13:41:10,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b929c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:41:10, skipping insertion in model container [2020-07-21 13:41:10,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:09" (2/3) ... [2020-07-21 13:41:10,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b929c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:41:10, skipping insertion in model container [2020-07-21 13:41:10,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:41:10" (3/3) ... [2020-07-21 13:41:10,309 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-07-21 13:41:10,321 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:41:10,344 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:41:10,371 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:41:10,405 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:41:10,405 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:41:10,405 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:41:10,406 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:41:10,406 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:41:10,406 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:41:10,406 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:41:10,406 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:41:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-21 13:41:10,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 13:41:10,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:41:10,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:41:10,429 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:41:10,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:41:10,436 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2020-07-21 13:41:10,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:41:10,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393973166] [2020-07-21 13:41:10,444 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 13:41:10,575 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:41:10,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:41:10,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 13:41:10,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:41:10,609 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 13:41:10,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:41:10,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393973166] [2020-07-21 13:41:10,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:41:10,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 13:41:10,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99579388] [2020-07-21 13:41:10,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 13:41:10,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:41:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 13:41:10,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 13:41:10,631 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-07-21 13:41:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:41:10,653 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-07-21 13:41:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 13:41:10,655 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-07-21 13:41:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:41:10,667 INFO L225 Difference]: With dead ends: 42 [2020-07-21 13:41:10,667 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 13:41:10,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 13:41:10,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 13:41:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 13:41:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 13:41:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 13:41:10,715 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-21 13:41:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:41:10,715 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 13:41:10,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 13:41:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 13:41:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 13:41:10,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:41:10,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:41:10,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:41:10,918 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:41:10,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:41:10,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2020-07-21 13:41:10,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:41:10,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273495279] [2020-07-21 13:41:10,921 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 13:41:11,013 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:41:11,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:41:11,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:41:11,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:41:11,058 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 13:41:11,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:41:11,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273495279] [2020-07-21 13:41:11,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:41:11,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:41:11,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080255264] [2020-07-21 13:41:11,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:41:11,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:41:11,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:41:11,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:41:11,069 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2020-07-21 13:41:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:41:11,105 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-21 13:41:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:41:11,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 13:41:11,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:41:11,108 INFO L225 Difference]: With dead ends: 34 [2020-07-21 13:41:11,109 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 13:41:11,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 13:41:11,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 13:41:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-21 13:41:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 13:41:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 13:41:11,126 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-07-21 13:41:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:41:11,127 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 13:41:11,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:41:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 13:41:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 13:41:11,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:41:11,132 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] [2020-07-21 13:41:11,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:41:11,335 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:41:11,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:41:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash 278779309, now seen corresponding path program 1 times [2020-07-21 13:41:11,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:41:11,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954615178] [2020-07-21 13:41:11,338 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 13:41:11,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:41:11,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:41:11,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:41:11,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:41:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:41:11,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:41:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:41:11,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954615178] [2020-07-21 13:41:11,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:41:11,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 13:41:11,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766109170] [2020-07-21 13:41:11,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 13:41:11,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:41:11,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 13:41:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:41:11,534 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-07-21 13:41:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:41:11,583 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-07-21 13:41:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:41:11,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-21 13:41:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:41:11,585 INFO L225 Difference]: With dead ends: 39 [2020-07-21 13:41:11,586 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 13:41:11,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:41:11,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 13:41:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 13:41:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 13:41:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-21 13:41:11,593 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-07-21 13:41:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:41:11,594 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-21 13:41:11,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 13:41:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-21 13:41:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 13:41:11,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:41:11,596 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:41:11,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:41:11,805 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:41:11,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:41:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1818492333, now seen corresponding path program 2 times [2020-07-21 13:41:11,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:41:11,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829587465] [2020-07-21 13:41:11,808 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 13:41:12,351 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:41:12,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:41:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:41:12,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:41:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:41:12,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:41:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:41:12,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829587465] [2020-07-21 13:41:12,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:41:12,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 13:41:12,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936371689] [2020-07-21 13:41:12,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 13:41:12,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:41:12,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 13:41:12,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:41:12,493 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2020-07-21 13:41:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:41:12,577 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-07-21 13:41:12,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:41:12,578 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-07-21 13:41:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:41:12,579 INFO L225 Difference]: With dead ends: 51 [2020-07-21 13:41:12,580 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 13:41:12,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:41:12,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 13:41:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 13:41:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 13:41:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-21 13:41:12,588 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 26 [2020-07-21 13:41:12,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:41:12,588 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-21 13:41:12,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 13:41:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-21 13:41:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 13:41:12,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:41:12,590 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:41:12,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:41:12,806 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:41:12,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:41:12,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1671822879, now seen corresponding path program 3 times [2020-07-21 13:41:12,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:41:12,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811132077] [2020-07-21 13:41:12,809 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