/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:01:17,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:01:17,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:01:17,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:01:17,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:01:17,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:01:17,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:01:17,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:01:17,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:01:17,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:01:17,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:01:17,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:01:17,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:01:17,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:01:17,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:01:17,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:01:17,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:01:17,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:01:17,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:01:17,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:01:17,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:01:17,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:01:17,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:01:17,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:01:17,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:01:17,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:01:17,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:01:17,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:01:17,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:01:17,618 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:01:17,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:01:17,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:01:17,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:01:17,620 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:01:17,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:01:17,621 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:01:17,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:01:17,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:01:17,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:01:17,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:01:17,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:01:17,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:01:17,622 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:01:17,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:01:17,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:01:17,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:01:17,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:01:17,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:01:17,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:01:17,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:01:17,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:01:17,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:01:17,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:01:17,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:01:17,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:01:17,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:17,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:01:17,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:01:17,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:01:17,929 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:01:17,947 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:01:17,951 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:01:17,960 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:01:17,961 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:01:17,962 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-07-21 14:01:18,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2b52b71c/5bcbd506300e4b06beea0fec305f6b03/FLAG324e39b9d [2020-07-21 14:01:18,580 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:01:18,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-07-21 14:01:18,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2b52b71c/5bcbd506300e4b06beea0fec305f6b03/FLAG324e39b9d [2020-07-21 14:01:18,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2b52b71c/5bcbd506300e4b06beea0fec305f6b03 [2020-07-21 14:01:18,953 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:01:18,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:01:18,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:01:18,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:01:18,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:01:18,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:01:18" (1/1) ... [2020-07-21 14:01:18,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e96d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:18, skipping insertion in model container [2020-07-21 14:01:18,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:01:18" (1/1) ... [2020-07-21 14:01:18,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:01:19,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:01:19,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:01:19,224 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:01:19,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:01:19,271 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:01:19,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:19 WrapperNode [2020-07-21 14:01:19,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:01:19,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:01:19,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:01:19,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:01:19,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:19" (1/1) ... [2020-07-21 14:01:19,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:19" (1/1) ... [2020-07-21 14:01:19,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:19" (1/1) ... [2020-07-21 14:01:19,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:19" (1/1) ... [2020-07-21 14:01:19,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:19" (1/1) ... [2020-07-21 14:01:19,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:19" (1/1) ... [2020-07-21 14:01:19,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:19" (1/1) ... [2020-07-21 14:01:19,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:01:19,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:01:19,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:01:19,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:01:19,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:01:19,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:01:19,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:01:19,493 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:01:19,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:01:19,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:01:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:01:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:01:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:01:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:01:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:01:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:01:19,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 14:01:19,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 14:01:19,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 14:01:19,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 14:01:19,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:01:19,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:01:19,782 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:01:19,783 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-21 14:01:19,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:01:19 BoogieIcfgContainer [2020-07-21 14:01:19,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:01:19,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:01:19,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:01:19,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:01:19,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:01:18" (1/3) ... [2020-07-21 14:01:19,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ffa59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:01:19, skipping insertion in model container [2020-07-21 14:01:19,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:19" (2/3) ... [2020-07-21 14:01:19,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ffa59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:01:19, skipping insertion in model container [2020-07-21 14:01:19,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:01:19" (3/3) ... [2020-07-21 14:01:19,797 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-07-21 14:01:19,809 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:01:19,827 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:01:19,873 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:01:19,912 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:01:19,912 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:01:19,912 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:01:19,913 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:01:19,913 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:01:19,913 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:01:19,913 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:01:19,913 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:01:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-21 14:01:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 14:01:19,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:19,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:19,940 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:19,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash -522531256, now seen corresponding path program 1 times [2020-07-21 14:01:19,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:19,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213940870] [2020-07-21 14:01:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:20,064 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:01:20,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:20,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:01:20,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:01:20,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:20,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213940870] [2020-07-21 14:01:20,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:20,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:01:20,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941039250] [2020-07-21 14:01:20,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:01:20,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:20,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:01:20,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:01:20,160 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-21 14:01:20,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:20,242 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2020-07-21 14:01:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:01:20,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 14:01:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:20,256 INFO L225 Difference]: With dead ends: 73 [2020-07-21 14:01:20,257 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 14:01:20,262 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 14:01:20,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 14:01:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-07-21 14:01:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 14:01:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-21 14:01:20,305 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2020-07-21 14:01:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:20,306 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-21 14:01:20,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:01:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-21 14:01:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 14:01:20,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:20,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:20,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:20,524 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:20,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1816798436, now seen corresponding path program 1 times [2020-07-21 14:01:20,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:20,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342469085] [2020-07-21 14:01:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:20,599 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:20,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:20,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:01:20,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 14:01:20,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 14:01:20,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342469085] [2020-07-21 14:01:20,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:20,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 14:01:20,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023139675] [2020-07-21 14:01:20,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 14:01:20,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:20,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 14:01:20,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:01:20,672 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-07-21 14:01:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:20,793 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2020-07-21 14:01:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 14:01:20,794 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-21 14:01:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:20,797 INFO L225 Difference]: With dead ends: 79 [2020-07-21 14:01:20,797 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 14:01:20,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:01:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 14:01:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-07-21 14:01:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 14:01:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-07-21 14:01:20,809 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2020-07-21 14:01:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:20,809 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-07-21 14:01:20,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:01:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-07-21 14:01:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 14:01:20,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:20,812 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 14:01:21,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:21,026 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:21,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:21,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1106103076, now seen corresponding path program 2 times [2020-07-21 14:01:21,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:21,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516785502] [2020-07-21 14:01:21,029 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 14:01:21,142 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:21,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:21,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:01:21,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 14:01:21,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 14:01:21,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516785502] [2020-07-21 14:01:21,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:21,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 14:01:21,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915962174] [2020-07-21 14:01:21,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 14:01:21,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:21,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 14:01:21,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 14:01:21,271 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 7 states. [2020-07-21 14:01:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:21,385 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-07-21 14:01:21,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 14:01:21,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-07-21 14:01:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:21,388 INFO L225 Difference]: With dead ends: 93 [2020-07-21 14:01:21,388 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 14:01:21,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 14:01:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 14:01:21,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-07-21 14:01:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 14:01:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-07-21 14:01:21,398 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2020-07-21 14:01:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:21,398 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-07-21 14:01:21,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 14:01:21,398 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-21 14:01:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-21 14:01:21,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:21,400 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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 14:01:21,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:21,615 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:21,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1061537308, now seen corresponding path program 3 times [2020-07-21 14:01:21,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:21,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766577967] [2020-07-21 14:01:21,617 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 14:01:21,728 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:21,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:21,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:01:21,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:21,762 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:01:21,767 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:01:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-21 14:01:21,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:21,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766577967] [2020-07-21 14:01:21,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:21,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 14:01:21,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555575793] [2020-07-21 14:01:21,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 14:01:21,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:21,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 14:01:21,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 14:01:21,795 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 7 states. [2020-07-21 14:01:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:21,856 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-21 14:01:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 14:01:21,857 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-07-21 14:01:21,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:21,858 INFO L225 Difference]: With dead ends: 62 [2020-07-21 14:01:21,858 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 14:01:21,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:01:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 14:01:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-21 14:01:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 14:01:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-07-21 14:01:21,866 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2020-07-21 14:01:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:21,866 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-07-21 14:01:21,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 14:01:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-07-21 14:01:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-21 14:01:21,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:21,869 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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 14:01:22,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:22,083 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:22,084 INFO L82 PathProgramCache]: Analyzing trace with hash -637010121, now seen corresponding path program 1 times [2020-07-21 14:01:22,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:22,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969049675] [2020-07-21 14:01:22,085 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 14:01:22,243 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:22,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:22,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:01:22,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:22,283 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:01:22,285 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:01:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-21 14:01:22,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:22,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969049675] [2020-07-21 14:01:22,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:22,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 14:01:22,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976078979] [2020-07-21 14:01:22,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:01:22,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:22,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:01:22,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:01:22,312 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-07-21 14:01:22,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:22,410 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-07-21 14:01:22,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 14:01:22,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-07-21 14:01:22,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:22,412 INFO L225 Difference]: With dead ends: 56 [2020-07-21 14:01:22,412 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 14:01:22,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:01:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 14:01:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-21 14:01:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 14:01:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-07-21 14:01:22,420 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2020-07-21 14:01:22,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:22,421 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-07-21 14:01:22,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:01:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-07-21 14:01:22,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 14:01:22,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:22,422 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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 14:01:22,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:22,636 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:22,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1604149734, now seen corresponding path program 1 times [2020-07-21 14:01:22,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:22,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221197642] [2020-07-21 14:01:22,638 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 14:01:22,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:22,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:22,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:01:22,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-21 14:01:22,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:22,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221197642] [2020-07-21 14:01:22,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:22,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:01:22,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617953047] [2020-07-21 14:01:22,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:01:22,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:22,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:01:22,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:01:22,816 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 4 states. [2020-07-21 14:01:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:22,838 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-07-21 14:01:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:01:22,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-21 14:01:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:22,840 INFO L225 Difference]: With dead ends: 67 [2020-07-21 14:01:22,840 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 14:01:22,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:01:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 14:01:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-21 14:01:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 14:01:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-07-21 14:01:22,848 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 48 [2020-07-21 14:01:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:22,849 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-07-21 14:01:22,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:01:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-07-21 14:01:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 14:01:22,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:22,850 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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 14:01:23,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:23,052 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash 855134175, now seen corresponding path program 1 times [2020-07-21 14:01:23,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:23,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536221911] [2020-07-21 14:01:23,055 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 14:01:23,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:23,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:23,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 14:01:23,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:23,277 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:01:23,279 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:01:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-21 14:01:23,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:23,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:01:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-21 14:01:23,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536221911] [2020-07-21 14:01:23,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 14:01:23,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2020-07-21 14:01:23,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60927145] [2020-07-21 14:01:23,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:01:23,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:23,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:01:23,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 14:01:23,350 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 5 states. [2020-07-21 14:01:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:23,367 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-07-21 14:01:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:01:23,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-07-21 14:01:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:23,368 INFO L225 Difference]: With dead ends: 51 [2020-07-21 14:01:23,368 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 14:01:23,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-21 14:01:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 14:01:23,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 14:01:23,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 14:01:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 14:01:23,370 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-07-21 14:01:23,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:23,370 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 14:01:23,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:01:23,370 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 14:01:23,370 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 14:01:23,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:23,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 14:01:23,809 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 14:01:23,809 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 14:01:23,809 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:01:23,810 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:01:23,810 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 14:01:23,810 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 14:01:23,810 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 14:01:23,810 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-21 14:01:23,810 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 14:01:23,810 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-21 14:01:23,811 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-21 14:01:23,811 INFO L264 CegarLoopResult]: At program point L35-3(lines 35 36) the Hoare annotation is: (and (<= 0 main_~nc_B~0) (= 0 main_~found~0)) [2020-07-21 14:01:23,811 INFO L268 CegarLoopResult]: For program point L35-4(lines 18 61) no Hoare annotation was computed. [2020-07-21 14:01:23,811 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-07-21 14:01:23,811 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 32) the Hoare annotation is: (= 0 main_~found~0) [2020-07-21 14:01:23,811 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 32) no Hoare annotation was computed. [2020-07-21 14:01:23,811 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-07-21 14:01:23,812 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-21 14:01:23,812 INFO L264 CegarLoopResult]: At program point L44-2(lines 42 54) the Hoare annotation is: (or (and (<= 1 main_~nc_B~0) (= 0 main_~found~0)) (and (<= 0 main_~j~0) (<= main_~nc_B~0 0))) [2020-07-21 14:01:23,812 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-21 14:01:23,812 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-21 14:01:23,813 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= 1 main_~found~0))) (or (and (or .cse0 (= 0 main_~found~0)) (<= 1 main_~nc_B~0)) (and .cse0 (<= 0 main_~j~0)))) [2020-07-21 14:01:23,813 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-07-21 14:01:23,813 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-07-21 14:01:23,813 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-07-21 14:01:23,813 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: true [2020-07-21 14:01:23,813 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 27) no Hoare annotation was computed. [2020-07-21 14:01:23,814 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 27) the Hoare annotation is: (= 0 main_~found~0) [2020-07-21 14:01:23,814 INFO L268 CegarLoopResult]: For program point L26-4(lines 26 27) no Hoare annotation was computed. [2020-07-21 14:01:23,814 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 23) no Hoare annotation was computed. [2020-07-21 14:01:23,814 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 23) the Hoare annotation is: (= 0 main_~found~0) [2020-07-21 14:01:23,814 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 23) no Hoare annotation was computed. [2020-07-21 14:01:23,814 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-07-21 14:01:23,814 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-21 14:01:23,814 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-21 14:01:23,815 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-21 14:01:23,815 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-21 14:01:23,815 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-21 14:01:23,815 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-21 14:01:23,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:01:23 BoogieIcfgContainer [2020-07-21 14:01:23,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:01:23,836 INFO L168 Benchmark]: Toolchain (without parser) took 4880.30 ms. Allocated memory was 136.3 MB in the beginning and 252.2 MB in the end (delta: 115.9 MB). Free memory was 99.5 MB in the beginning and 179.8 MB in the end (delta: -80.3 MB). Peak memory consumption was 35.5 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:23,837 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 136.3 MB. Free memory was 118.1 MB in the beginning and 117.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 14:01:23,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.24 ms. Allocated memory is still 136.3 MB. Free memory was 99.1 MB in the beginning and 88.5 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:23,839 INFO L168 Benchmark]: Boogie Preprocessor took 133.68 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 88.5 MB in the beginning and 176.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:23,840 INFO L168 Benchmark]: RCFGBuilder took 380.37 ms. Allocated memory is still 199.2 MB. Free memory was 176.5 MB in the beginning and 157.3 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:23,841 INFO L168 Benchmark]: TraceAbstraction took 4044.71 ms. Allocated memory was 199.2 MB in the beginning and 252.2 MB in the end (delta: 53.0 MB). Free memory was 156.6 MB in the beginning and 179.8 MB in the end (delta: -23.2 MB). Peak memory consumption was 29.8 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:23,845 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 136.3 MB. Free memory was 118.1 MB in the beginning and 117.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.24 ms. Allocated memory is still 136.3 MB. Free memory was 99.1 MB in the beginning and 88.5 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.68 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 88.5 MB in the beginning and 176.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 380.37 ms. Allocated memory is still 199.2 MB. Free memory was 176.5 MB in the beginning and 157.3 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4044.71 ms. Allocated memory was 199.2 MB in the beginning and 252.2 MB in the end (delta: 53.0 MB). Free memory was 156.6 MB in the beginning and 179.8 MB in the end (delta: -23.2 MB). Peak memory consumption was 29.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: 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: 31]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (1 <= nc_B && 0 == found) || (0 <= j && nc_B <= 0) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 <= nc_B && 0 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 148 SDslu, 394 SDs, 0 SdLazy, 207 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 396 GetRequests, 351 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 43 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 18 PreInvPairs, 42 NumberOfFragments, 55 HoareAnnotationTreeSize, 18 FomulaSimplifications, 280 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 14 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 278 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 386 ConstructedInterpolants, 0 QuantifiedInterpolants, 23372 SizeOfPredicates, 18 NumberOfNonLiveVariables, 917 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 297/333 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...