/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_security.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:38:07,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:38:07,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:38:07,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:38:07,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:38:07,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:38:07,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:38:07,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:38:07,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:38:07,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:38:07,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:38:07,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:38:07,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:38:07,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:38:07,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:38:07,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:38:07,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:38:07,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:38:07,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:38:07,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:38:07,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:38:07,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:38:07,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:38:07,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:38:07,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:38:07,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:38:07,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:38:07,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:38:07,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:38:07,229 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:38:07,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:38:07,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:38:07,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:38:07,231 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:38:07,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:38:07,232 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:38:07,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:38:07,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:38:07,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:38:07,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:38:07,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:38:07,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:38:07,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:38:07,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:38:07,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:38:07,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:38:07,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:38:07,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:38:07,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:38:07,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:38:07,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:38:07,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:38:07,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:38:07,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:38:07,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:38:07,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:07,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:38:07,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:38:07,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:38:07,558 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:38:07,571 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:38:07,575 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:38:07,576 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:38:07,576 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:38:07,577 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_security.c [2020-07-21 16:38:07,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18df182c3/c8428e15a0934bd79ac4a3caf6d59fba/FLAG502229aec [2020-07-21 16:38:08,099 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:38:08,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_security.c [2020-07-21 16:38:08,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18df182c3/c8428e15a0934bd79ac4a3caf6d59fba/FLAG502229aec [2020-07-21 16:38:08,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18df182c3/c8428e15a0934bd79ac4a3caf6d59fba [2020-07-21 16:38:08,446 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:38:08,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:38:08,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:38:08,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:38:08,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:38:08,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:38:08" (1/1) ... [2020-07-21 16:38:08,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e332ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:38:08, skipping insertion in model container [2020-07-21 16:38:08,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:38:08" (1/1) ... [2020-07-21 16:38:08,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:38:08,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:38:08,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:38:08,710 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:38:08,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:38:08,868 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:38:08,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:38:08 WrapperNode [2020-07-21 16:38:08,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:38:08,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:38:08,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:38:08,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:38:08,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:38:08" (1/1) ... [2020-07-21 16:38:08,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:38:08" (1/1) ... [2020-07-21 16:38:08,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:38:08" (1/1) ... [2020-07-21 16:38:08,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:38:08" (1/1) ... [2020-07-21 16:38:08,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:38:08" (1/1) ... [2020-07-21 16:38:08,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:38:08" (1/1) ... [2020-07-21 16:38:08,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:38:08" (1/1) ... [2020-07-21 16:38:08,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:38:08,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:38:08,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:38:08,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:38:08,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:38:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:38:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:38:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:38:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:38:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:38:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:38:08,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:38:08,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:38:08,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:38:09,487 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:38:09,488 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-21 16:38:09,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:38:09 BoogieIcfgContainer [2020-07-21 16:38:09,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:38:09,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:38:09,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:38:09,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:38:09,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:38:08" (1/3) ... [2020-07-21 16:38:09,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:38:09, skipping insertion in model container [2020-07-21 16:38:09,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:38:08" (2/3) ... [2020-07-21 16:38:09,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:38:09, skipping insertion in model container [2020-07-21 16:38:09,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:38:09" (3/3) ... [2020-07-21 16:38:09,501 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_security.c [2020-07-21 16:38:09,513 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:38:09,524 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:38:09,538 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:38:09,565 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:38:09,566 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:38:09,566 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:38:09,566 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:38:09,566 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:38:09,566 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:38:09,567 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:38:09,567 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:38:09,589 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-07-21 16:38:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:38:09,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:38:09,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:38:09,597 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:38:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:38:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash -105811556, now seen corresponding path program 1 times [2020-07-21 16:38:09,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:38:09,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481016674] [2020-07-21 16:38:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:09,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:38:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:38:09,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:38:09,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:38:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:38:09,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:38:09,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481016674] [2020-07-21 16:38:09,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:38:09,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:38:09,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280181710] [2020-07-21 16:38:09,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:38:09,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:38:09,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:38:09,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:38:09,759 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 2 states. [2020-07-21 16:38:09,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:38:09,794 INFO L93 Difference]: Finished difference Result 160 states and 298 transitions. [2020-07-21 16:38:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:38:09,796 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-21 16:38:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:38:09,809 INFO L225 Difference]: With dead ends: 160 [2020-07-21 16:38:09,809 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 16:38:09,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:38:09,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 16:38:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-21 16:38:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 16:38:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 113 transitions. [2020-07-21 16:38:09,857 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 113 transitions. Word has length 13 [2020-07-21 16:38:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:38:09,858 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 113 transitions. [2020-07-21 16:38:09,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:38:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 113 transitions. [2020-07-21 16:38:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:38:09,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:38:09,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:38:10,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:10,075 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:38:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:38:10,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1547300989, now seen corresponding path program 1 times [2020-07-21 16:38:10,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:38:10,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202073053] [2020-07-21 16:38:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:10,127 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:38:10,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:38:10,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:38:10,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:38:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:38:10,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:38:10,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202073053] [2020-07-21 16:38:10,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:38:10,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:38:10,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193501764] [2020-07-21 16:38:10,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:38:10,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:38:10,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:38:10,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:10,184 INFO L87 Difference]: Start difference. First operand 78 states and 113 transitions. Second operand 3 states. [2020-07-21 16:38:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:38:10,334 INFO L93 Difference]: Finished difference Result 157 states and 232 transitions. [2020-07-21 16:38:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:38:10,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 16:38:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:38:10,338 INFO L225 Difference]: With dead ends: 157 [2020-07-21 16:38:10,338 INFO L226 Difference]: Without dead ends: 85 [2020-07-21 16:38:10,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-21 16:38:10,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-07-21 16:38:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 16:38:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2020-07-21 16:38:10,361 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 14 [2020-07-21 16:38:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:38:10,361 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2020-07-21 16:38:10,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:38:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2020-07-21 16:38:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 16:38:10,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:38:10,367 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:38:10,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:10,582 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:38:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:38:10,583 INFO L82 PathProgramCache]: Analyzing trace with hash 555004895, now seen corresponding path program 1 times [2020-07-21 16:38:10,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:38:10,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862999743] [2020-07-21 16:38:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:10,628 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:38:10,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:38:10,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:38:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:38:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:38:10,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:38:10,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862999743] [2020-07-21 16:38:10,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:38:10,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:38:10,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542470881] [2020-07-21 16:38:10,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:38:10,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:38:10,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:38:10,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:10,644 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand 3 states. [2020-07-21 16:38:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:38:10,727 INFO L93 Difference]: Finished difference Result 155 states and 224 transitions. [2020-07-21 16:38:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:38:10,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 16:38:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:38:10,729 INFO L225 Difference]: With dead ends: 155 [2020-07-21 16:38:10,729 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 16:38:10,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 16:38:10,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-21 16:38:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 16:38:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-07-21 16:38:10,739 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 19 [2020-07-21 16:38:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:38:10,739 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-07-21 16:38:10,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:38:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-07-21 16:38:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 16:38:10,741 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:38:10,741 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:38:10,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:10,956 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:38:10,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:38:10,957 INFO L82 PathProgramCache]: Analyzing trace with hash -624681896, now seen corresponding path program 1 times [2020-07-21 16:38:10,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:38:10,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42628634] [2020-07-21 16:38:10,959 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:10,993 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:38:10,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:38:10,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:38:10,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:38:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:38:11,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:38:11,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42628634] [2020-07-21 16:38:11,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:38:11,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:38:11,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798905318] [2020-07-21 16:38:11,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:38:11,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:38:11,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:38:11,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:11,016 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 3 states. [2020-07-21 16:38:11,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:38:11,122 INFO L93 Difference]: Finished difference Result 196 states and 285 transitions. [2020-07-21 16:38:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:38:11,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 16:38:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:38:11,125 INFO L225 Difference]: With dead ends: 196 [2020-07-21 16:38:11,125 INFO L226 Difference]: Without dead ends: 126 [2020-07-21 16:38:11,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-21 16:38:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2020-07-21 16:38:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-21 16:38:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 158 transitions. [2020-07-21 16:38:11,138 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 158 transitions. Word has length 22 [2020-07-21 16:38:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:38:11,139 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 158 transitions. [2020-07-21 16:38:11,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:38:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 158 transitions. [2020-07-21 16:38:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 16:38:11,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:38:11,141 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:38:11,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:11,355 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:38:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:38:11,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1531598883, now seen corresponding path program 1 times [2020-07-21 16:38:11,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:38:11,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029780299] [2020-07-21 16:38:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:11,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:38:11,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:38:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:38:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:38:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:38:11,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:38:11,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029780299] [2020-07-21 16:38:11,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:38:11,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:38:11,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690721185] [2020-07-21 16:38:11,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:38:11,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:38:11,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:38:11,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:11,414 INFO L87 Difference]: Start difference. First operand 112 states and 158 transitions. Second operand 3 states. [2020-07-21 16:38:11,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:38:11,471 INFO L93 Difference]: Finished difference Result 193 states and 275 transitions. [2020-07-21 16:38:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:38:11,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 16:38:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:38:11,475 INFO L225 Difference]: With dead ends: 193 [2020-07-21 16:38:11,475 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 16:38:11,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 16:38:11,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-07-21 16:38:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 16:38:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 130 transitions. [2020-07-21 16:38:11,486 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 130 transitions. Word has length 23 [2020-07-21 16:38:11,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:38:11,486 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 130 transitions. [2020-07-21 16:38:11,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:38:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 130 transitions. [2020-07-21 16:38:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 16:38:11,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:38:11,488 INFO L422 BasicCegarLoop]: trace histogram [3, 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 16:38:11,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:11,703 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:38:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:38:11,704 INFO L82 PathProgramCache]: Analyzing trace with hash -576284788, now seen corresponding path program 1 times [2020-07-21 16:38:11,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:38:11,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360293550] [2020-07-21 16:38:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:11,738 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:38:11,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:38:11,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:38:11,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:38:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:38:11,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:38:11,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360293550] [2020-07-21 16:38:11,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:38:11,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:38:11,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373818432] [2020-07-21 16:38:11,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:38:11,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:38:11,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:38:11,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:11,762 INFO L87 Difference]: Start difference. First operand 95 states and 130 transitions. Second operand 3 states. [2020-07-21 16:38:11,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:38:11,819 INFO L93 Difference]: Finished difference Result 144 states and 203 transitions. [2020-07-21 16:38:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:38:11,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-21 16:38:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:38:11,822 INFO L225 Difference]: With dead ends: 144 [2020-07-21 16:38:11,822 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 16:38:11,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 16:38:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-07-21 16:38:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 16:38:11,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2020-07-21 16:38:11,831 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 29 [2020-07-21 16:38:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:38:11,831 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2020-07-21 16:38:11,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:38:11,832 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2020-07-21 16:38:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 16:38:11,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:38:11,833 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:38:12,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:12,050 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:38:12,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:38:12,050 INFO L82 PathProgramCache]: Analyzing trace with hash -31288535, now seen corresponding path program 1 times [2020-07-21 16:38:12,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:38:12,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850061364] [2020-07-21 16:38:12,051 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:12,091 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:38:12,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:38:12,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:38:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:38:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:38:12,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:38:12,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850061364] [2020-07-21 16:38:12,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:38:12,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:38:12,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394259313] [2020-07-21 16:38:12,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:38:12,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:38:12,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:38:12,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:12,112 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand 3 states. [2020-07-21 16:38:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:38:12,208 INFO L93 Difference]: Finished difference Result 165 states and 237 transitions. [2020-07-21 16:38:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:38:12,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-21 16:38:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:38:12,210 INFO L225 Difference]: With dead ends: 165 [2020-07-21 16:38:12,211 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 16:38:12,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 16:38:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2020-07-21 16:38:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 16:38:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 147 transitions. [2020-07-21 16:38:12,239 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 147 transitions. Word has length 30 [2020-07-21 16:38:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:38:12,239 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 147 transitions. [2020-07-21 16:38:12,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:38:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 147 transitions. [2020-07-21 16:38:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 16:38:12,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:38:12,243 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:38:12,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:12,460 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:38:12,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:38:12,461 INFO L82 PathProgramCache]: Analyzing trace with hash 180888733, now seen corresponding path program 1 times [2020-07-21 16:38:12,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:38:12,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405146848] [2020-07-21 16:38:12,462 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:12,497 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:38:12,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:38:12,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:38:12,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:38:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:38:12,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:38:12,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405146848] [2020-07-21 16:38:12,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:38:12,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:38:12,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119487275] [2020-07-21 16:38:12,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:38:12,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:38:12,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:38:12,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:12,510 INFO L87 Difference]: Start difference. First operand 106 states and 147 transitions. Second operand 3 states. [2020-07-21 16:38:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:38:12,574 INFO L93 Difference]: Finished difference Result 173 states and 241 transitions. [2020-07-21 16:38:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:38:12,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-21 16:38:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:38:12,577 INFO L225 Difference]: With dead ends: 173 [2020-07-21 16:38:12,577 INFO L226 Difference]: Without dead ends: 99 [2020-07-21 16:38:12,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-21 16:38:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-07-21 16:38:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 16:38:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2020-07-21 16:38:12,587 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 31 [2020-07-21 16:38:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:38:12,587 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2020-07-21 16:38:12,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:38:12,588 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2020-07-21 16:38:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 16:38:12,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:38:12,589 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:38:12,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:12,797 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:38:12,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:38:12,798 INFO L82 PathProgramCache]: Analyzing trace with hash 317242888, now seen corresponding path program 1 times [2020-07-21 16:38:12,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:38:12,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720755742] [2020-07-21 16:38:12,800 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:12,843 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:38:12,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:38:12,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:38:12,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:38:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:38:12,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:38:12,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720755742] [2020-07-21 16:38:12,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:38:12,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:38:12,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153590108] [2020-07-21 16:38:12,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:38:12,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:38:12,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:38:12,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:12,880 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand 3 states. [2020-07-21 16:38:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:38:12,938 INFO L93 Difference]: Finished difference Result 148 states and 196 transitions. [2020-07-21 16:38:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:38:12,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-21 16:38:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:38:12,940 INFO L225 Difference]: With dead ends: 148 [2020-07-21 16:38:12,940 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 16:38:12,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 16:38:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-21 16:38:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 16:38:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2020-07-21 16:38:12,947 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 31 [2020-07-21 16:38:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:38:12,947 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2020-07-21 16:38:12,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:38:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2020-07-21 16:38:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 16:38:12,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:38:12,949 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:38:13,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:13,163 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:38:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:38:13,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1695196396, now seen corresponding path program 1 times [2020-07-21 16:38:13,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:38:13,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088988501] [2020-07-21 16:38:13,166 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:13,200 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:38:13,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:38:13,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:38:13,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:38:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:38:13,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:38:13,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088988501] [2020-07-21 16:38:13,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:38:13,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:38:13,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808031793] [2020-07-21 16:38:13,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:38:13,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:38:13,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:38:13,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:13,213 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand 3 states. [2020-07-21 16:38:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:38:13,241 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-07-21 16:38:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:38:13,242 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-07-21 16:38:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:38:13,243 INFO L225 Difference]: With dead ends: 83 [2020-07-21 16:38:13,243 INFO L226 Difference]: Without dead ends: 79 [2020-07-21 16:38:13,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-21 16:38:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-07-21 16:38:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 16:38:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-07-21 16:38:13,249 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 32 [2020-07-21 16:38:13,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:38:13,250 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-07-21 16:38:13,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:38:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-07-21 16:38:13,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 16:38:13,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:38:13,251 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:38:13,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:13,464 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:38:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:38:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1000030502, now seen corresponding path program 1 times [2020-07-21 16:38:13,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:38:13,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505722089] [2020-07-21 16:38:13,466 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:13,498 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:38:13,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:38:13,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:38:13,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:38:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:38:13,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:38:13,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505722089] [2020-07-21 16:38:13,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:38:13,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:38:13,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995426202] [2020-07-21 16:38:13,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:38:13,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:38:13,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:38:13,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:38:13,519 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 3 states. [2020-07-21 16:38:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:38:13,553 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2020-07-21 16:38:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:38:13,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-21 16:38:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:38:13,554 INFO L225 Difference]: With dead ends: 122 [2020-07-21 16:38:13,555 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:38:13,555 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 [2020-07-21 16:38:13,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:38:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:38:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:38:13,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:38:13,558 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-07-21 16:38:13,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:38:13,558 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:38:13,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:38:13,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:38:13,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:38:13,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:38:13,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:38:13,969 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:38:13,969 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:38:13,969 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:38:13,969 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:38:13,969 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:38:13,970 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:38:13,970 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:38:13,970 INFO L268 CegarLoopResult]: For program point L316(lines 316 331) no Hoare annotation was computed. [2020-07-21 16:38:13,970 INFO L268 CegarLoopResult]: For program point L283(lines 283 382) no Hoare annotation was computed. [2020-07-21 16:38:13,970 INFO L268 CegarLoopResult]: For program point L250(lines 250 261) no Hoare annotation was computed. [2020-07-21 16:38:13,970 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 390) no Hoare annotation was computed. [2020-07-21 16:38:13,970 INFO L268 CegarLoopResult]: For program point L184(lines 184 199) no Hoare annotation was computed. [2020-07-21 16:38:13,970 INFO L268 CegarLoopResult]: For program point L118(lines 118 129) no Hoare annotation was computed. [2020-07-21 16:38:13,971 INFO L268 CegarLoopResult]: For program point L366(lines 366 377) no Hoare annotation was computed. [2020-07-21 16:38:13,971 INFO L268 CegarLoopResult]: For program point L300(lines 300 315) no Hoare annotation was computed. [2020-07-21 16:38:13,971 INFO L268 CegarLoopResult]: For program point L234(lines 234 245) no Hoare annotation was computed. [2020-07-21 16:38:13,971 INFO L268 CegarLoopResult]: For program point L102(lines 102 113) no Hoare annotation was computed. [2020-07-21 16:38:13,971 INFO L268 CegarLoopResult]: For program point L350(lines 350 361) no Hoare annotation was computed. [2020-07-21 16:38:13,971 INFO L268 CegarLoopResult]: For program point L284(lines 284 299) no Hoare annotation was computed. [2020-07-21 16:38:13,971 INFO L268 CegarLoopResult]: For program point L218(lines 218 229) no Hoare annotation was computed. [2020-07-21 16:38:13,971 INFO L268 CegarLoopResult]: For program point L86(lines 86 88) no Hoare annotation was computed. [2020-07-21 16:38:13,971 INFO L268 CegarLoopResult]: For program point L334(lines 334 345) no Hoare annotation was computed. [2020-07-21 16:38:13,972 INFO L268 CegarLoopResult]: For program point L202(lines 202 213) no Hoare annotation was computed. [2020-07-21 16:38:13,972 INFO L268 CegarLoopResult]: For program point L70(lines 70 72) no Hoare annotation was computed. [2020-07-21 16:38:13,972 INFO L268 CegarLoopResult]: For program point L318(lines 318 329) no Hoare annotation was computed. [2020-07-21 16:38:13,972 INFO L268 CegarLoopResult]: For program point L186(lines 186 197) no Hoare annotation was computed. [2020-07-21 16:38:13,972 INFO L268 CegarLoopResult]: For program point L54(lines 54 56) no Hoare annotation was computed. [2020-07-21 16:38:13,972 INFO L268 CegarLoopResult]: For program point L302(lines 302 313) no Hoare annotation was computed. [2020-07-21 16:38:13,972 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 390) no Hoare annotation was computed. [2020-07-21 16:38:13,972 INFO L268 CegarLoopResult]: For program point L170(lines 170 172) no Hoare annotation was computed. [2020-07-21 16:38:13,973 INFO L268 CegarLoopResult]: For program point L286(lines 286 297) no Hoare annotation was computed. [2020-07-21 16:38:13,973 INFO L268 CegarLoopResult]: For program point L154(lines 154 156) no Hoare annotation was computed. [2020-07-21 16:38:13,973 INFO L264 CegarLoopResult]: At program point L22-2(lines 22 385) the Hoare annotation is: (let ((.cse0 (<= main_~this_state~0 0))) (or (and (<= 3 main_~q~0) (= 2 main_~this_state~0) (<= main_~q~0 3)) (and (<= 4 main_~q~0) (= 3 main_~this_state~0)) (and (<= main_~q~0 2) (<= 2 main_~q~0) .cse0) (and .cse0 (<= main_~q~0 0)))) [2020-07-21 16:38:13,973 INFO L268 CegarLoopResult]: For program point L22-3(lines 22 385) no Hoare annotation was computed. [2020-07-21 16:38:13,973 INFO L268 CegarLoopResult]: For program point L270(lines 270 272) no Hoare annotation was computed. [2020-07-21 16:38:13,973 INFO L268 CegarLoopResult]: For program point L138(lines 138 140) no Hoare annotation was computed. [2020-07-21 16:38:13,974 INFO L268 CegarLoopResult]: For program point L254(lines 254 256) no Hoare annotation was computed. [2020-07-21 16:38:13,974 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-07-21 16:38:13,974 INFO L268 CegarLoopResult]: For program point L370(lines 370 372) no Hoare annotation was computed. [2020-07-21 16:38:13,974 INFO L268 CegarLoopResult]: For program point L238(lines 238 240) no Hoare annotation was computed. [2020-07-21 16:38:13,974 INFO L268 CegarLoopResult]: For program point L106(lines 106 108) no Hoare annotation was computed. [2020-07-21 16:38:13,974 INFO L268 CegarLoopResult]: For program point L354(lines 354 356) no Hoare annotation was computed. [2020-07-21 16:38:13,974 INFO L268 CegarLoopResult]: For program point L222(lines 222 224) no Hoare annotation was computed. [2020-07-21 16:38:13,975 INFO L264 CegarLoopResult]: At program point L371(lines 13 390) the Hoare annotation is: false [2020-07-21 16:38:13,975 INFO L268 CegarLoopResult]: For program point L338(lines 338 340) no Hoare annotation was computed. [2020-07-21 16:38:13,975 INFO L268 CegarLoopResult]: For program point L206(lines 206 208) no Hoare annotation was computed. [2020-07-21 16:38:13,975 INFO L268 CegarLoopResult]: For program point L322(lines 322 324) no Hoare annotation was computed. [2020-07-21 16:38:13,975 INFO L268 CegarLoopResult]: For program point L190(lines 190 192) no Hoare annotation was computed. [2020-07-21 16:38:13,975 INFO L268 CegarLoopResult]: For program point L306(lines 306 308) no Hoare annotation was computed. [2020-07-21 16:38:13,975 INFO L268 CegarLoopResult]: For program point L290(lines 290 292) no Hoare annotation was computed. [2020-07-21 16:38:13,975 INFO L268 CegarLoopResult]: For program point L27(lines 27 46) no Hoare annotation was computed. [2020-07-21 16:38:13,976 INFO L268 CegarLoopResult]: For program point L28(lines 28 43) no Hoare annotation was computed. [2020-07-21 16:38:13,976 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 389) no Hoare annotation was computed. [2020-07-21 16:38:13,976 INFO L268 CegarLoopResult]: For program point L30(lines 30 41) no Hoare annotation was computed. [2020-07-21 16:38:13,976 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 390) the Hoare annotation is: true [2020-07-21 16:38:13,976 INFO L268 CegarLoopResult]: For program point L80(lines 80 95) no Hoare annotation was computed. [2020-07-21 16:38:13,976 INFO L268 CegarLoopResult]: For program point L47(lines 47 98) no Hoare annotation was computed. [2020-07-21 16:38:13,976 INFO L268 CegarLoopResult]: For program point L64(lines 64 79) no Hoare annotation was computed. [2020-07-21 16:38:13,976 INFO L268 CegarLoopResult]: For program point L48(lines 48 63) no Hoare annotation was computed. [2020-07-21 16:38:13,977 INFO L268 CegarLoopResult]: For program point L164(lines 164 179) no Hoare annotation was computed. [2020-07-21 16:38:13,977 INFO L268 CegarLoopResult]: For program point L148(lines 148 163) no Hoare annotation was computed. [2020-07-21 16:38:13,977 INFO L268 CegarLoopResult]: For program point L82(lines 82 93) no Hoare annotation was computed. [2020-07-21 16:38:13,977 INFO L268 CegarLoopResult]: For program point L264(lines 264 279) no Hoare annotation was computed. [2020-07-21 16:38:13,977 INFO L268 CegarLoopResult]: For program point L132(lines 132 147) no Hoare annotation was computed. [2020-07-21 16:38:13,977 INFO L268 CegarLoopResult]: For program point L99(lines 99 182) no Hoare annotation was computed. [2020-07-21 16:38:13,977 INFO L268 CegarLoopResult]: For program point L66(lines 66 77) no Hoare annotation was computed. [2020-07-21 16:38:13,977 INFO L268 CegarLoopResult]: For program point L248(lines 248 263) no Hoare annotation was computed. [2020-07-21 16:38:13,978 INFO L268 CegarLoopResult]: For program point L116(lines 116 131) no Hoare annotation was computed. [2020-07-21 16:38:13,978 INFO L268 CegarLoopResult]: For program point L50(lines 50 61) no Hoare annotation was computed. [2020-07-21 16:38:13,978 INFO L268 CegarLoopResult]: For program point L364(lines 364 379) no Hoare annotation was computed. [2020-07-21 16:38:13,978 INFO L268 CegarLoopResult]: For program point L232(lines 232 247) no Hoare annotation was computed. [2020-07-21 16:38:13,978 INFO L268 CegarLoopResult]: For program point L166(lines 166 177) no Hoare annotation was computed. [2020-07-21 16:38:13,978 INFO L268 CegarLoopResult]: For program point L100(lines 100 115) no Hoare annotation was computed. [2020-07-21 16:38:13,978 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-21 16:38:13,979 INFO L264 CegarLoopResult]: At program point L381(lines 22 385) the Hoare annotation is: (let ((.cse0 (<= main_~this_state~0 0))) (or (and (<= 3 main_~q~0) (= 2 main_~this_state~0) (<= main_~q~0 3)) (and (<= 4 main_~q~0) (= 3 main_~this_state~0)) (and (<= main_~q~0 2) (<= 2 main_~q~0) .cse0) (and .cse0 (<= main_~q~0 0)))) [2020-07-21 16:38:13,979 INFO L268 CegarLoopResult]: For program point L348(lines 348 363) no Hoare annotation was computed. [2020-07-21 16:38:13,979 INFO L268 CegarLoopResult]: For program point L216(lines 216 231) no Hoare annotation was computed. [2020-07-21 16:38:13,979 INFO L268 CegarLoopResult]: For program point L183(lines 183 282) no Hoare annotation was computed. [2020-07-21 16:38:13,979 INFO L268 CegarLoopResult]: For program point L150(lines 150 161) no Hoare annotation was computed. [2020-07-21 16:38:13,979 INFO L268 CegarLoopResult]: For program point L332(lines 332 347) no Hoare annotation was computed. [2020-07-21 16:38:13,979 INFO L268 CegarLoopResult]: For program point L266(lines 266 277) no Hoare annotation was computed. [2020-07-21 16:38:13,979 INFO L268 CegarLoopResult]: For program point L200(lines 200 215) no Hoare annotation was computed. [2020-07-21 16:38:13,980 INFO L268 CegarLoopResult]: For program point L134(lines 134 145) no Hoare annotation was computed. [2020-07-21 16:38:13,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:38:13 BoogieIcfgContainer [2020-07-21 16:38:14,000 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:38:14,003 INFO L168 Benchmark]: Toolchain (without parser) took 5553.77 ms. Allocated memory was 147.8 MB in the beginning and 242.7 MB in the end (delta: 94.9 MB). Free memory was 105.1 MB in the beginning and 151.5 MB in the end (delta: -46.4 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:38:14,004 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 124.0 MB in the beginning and 123.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 16:38:14,005 INFO L168 Benchmark]: CACSL2BoogieTranslator took 418.52 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 104.7 MB in the beginning and 182.6 MB in the end (delta: -77.8 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:38:14,006 INFO L168 Benchmark]: Boogie Preprocessor took 50.28 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 180.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:38:14,006 INFO L168 Benchmark]: RCFGBuilder took 572.84 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 151.5 MB in the end (delta: 28.5 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:38:14,007 INFO L168 Benchmark]: TraceAbstraction took 4505.93 ms. Allocated memory was 203.9 MB in the beginning and 242.7 MB in the end (delta: 38.8 MB). Free memory was 150.9 MB in the beginning and 151.5 MB in the end (delta: -621.3 kB). Peak memory consumption was 38.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:38:14,011 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 124.0 MB in the beginning and 123.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 418.52 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 104.7 MB in the beginning and 182.6 MB in the end (delta: -77.8 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.28 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 180.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 572.84 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 151.5 MB in the end (delta: 28.5 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4505.93 ms. Allocated memory was 203.9 MB in the beginning and 242.7 MB in the end (delta: 38.8 MB). Free memory was 150.9 MB in the beginning and 151.5 MB in the end (delta: -621.3 kB). Peak memory consumption was 38.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 389]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((3 <= q && 2 == this_state) && q <= 3) || (4 <= q && 3 == this_state)) || ((q <= 2 && 2 <= q) && this_state <= 0)) || (this_state <= 0 && q <= 0) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((3 <= q && 2 == this_state) && q <= 3) || (4 <= q && 3 == this_state)) || ((q <= 2 && 2 <= q) && this_state <= 0)) || (this_state <= 0 && q <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1006 SDtfs, 364 SDslu, 444 SDs, 0 SdLazy, 232 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 28 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 15 NumberOfFragments, 75 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 42 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 277 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 266 ConstructedInterpolants, 0 QuantifiedInterpolants, 10696 SizeOfPredicates, 8 NumberOfNonLiveVariables, 865 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 55/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...