/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:46:38,431 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 01:46:38,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:46:38,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:46:38,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:46:38,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:46:38,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:46:38,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:46:38,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:46:38,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:46:38,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:46:38,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:46:38,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:46:38,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:46:38,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:46:38,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:46:38,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:46:38,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:46:38,545 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 01:46:38,583 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:46:38,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:46:38,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:46:38,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:46:38,589 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:46:38,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:46:38,589 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:46:38,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:46:38,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:46:38,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:46:38,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:46:38,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:46:38,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:46:38,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:46:38,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:46:38,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:46:38,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:46:38,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:46:38,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:46:38,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:46:38,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:46:38,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:46:38,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:46:38,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:46:38,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:46:38,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:46:38,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:38,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:46:38,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:46:38,599 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:46:38,939 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:46:38,954 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:46:38,958 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:46:38,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:46:38,960 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:46:38,961 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-07-21 01:46:39,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7407d6970/16f37efa1b274f31b6f9ee952cda40ff/FLAG5b4c1cc78 [2020-07-21 01:46:39,535 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:46:39,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-07-21 01:46:39,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7407d6970/16f37efa1b274f31b6f9ee952cda40ff/FLAG5b4c1cc78 [2020-07-21 01:46:39,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7407d6970/16f37efa1b274f31b6f9ee952cda40ff [2020-07-21 01:46:39,875 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:46:39,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:46:39,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:46:39,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:46:39,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:46:39,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:46:39" (1/1) ... [2020-07-21 01:46:39,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b85af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:39, skipping insertion in model container [2020-07-21 01:46:39,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:46:39" (1/1) ... [2020-07-21 01:46:39,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:46:39,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:46:40,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:46:40,139 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:46:40,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:46:40,178 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:46:40,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:40 WrapperNode [2020-07-21 01:46:40,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:46:40,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:46:40,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:46:40,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:46:40,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:40" (1/1) ... [2020-07-21 01:46:40,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:40" (1/1) ... [2020-07-21 01:46:40,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:40" (1/1) ... [2020-07-21 01:46:40,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:40" (1/1) ... [2020-07-21 01:46:40,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:40" (1/1) ... [2020-07-21 01:46:40,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:40" (1/1) ... [2020-07-21 01:46:40,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:40" (1/1) ... [2020-07-21 01:46:40,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:46:40,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:46:40,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:46:40,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:46:40,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:40" (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 01:46:40,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:46:40,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:46:40,378 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:46:40,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:46:40,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:46:40,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:46:40,379 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:46:40,379 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:46:40,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:46:40,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:46:40,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:46:40,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:46:40,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:46:40,668 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:46:40,668 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 01:46:40,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:46:40 BoogieIcfgContainer [2020-07-21 01:46:40,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:46:40,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:46:40,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:46:40,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:46:40,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:46:39" (1/3) ... [2020-07-21 01:46:40,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5a7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:46:40, skipping insertion in model container [2020-07-21 01:46:40,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:40" (2/3) ... [2020-07-21 01:46:40,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5a7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:46:40, skipping insertion in model container [2020-07-21 01:46:40,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:46:40" (3/3) ... [2020-07-21 01:46:40,683 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2020-07-21 01:46:40,701 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:46:40,713 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:46:40,753 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:46:40,797 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:46:40,797 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:46:40,797 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:46:40,798 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:46:40,798 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:46:40,798 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:46:40,798 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:46:40,798 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:46:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-07-21 01:46:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:46:40,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:40,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:40,830 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:40,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1128800291, now seen corresponding path program 1 times [2020-07-21 01:46:40,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:40,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374914866] [2020-07-21 01:46:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:40,918 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:46:40,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:40,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:46:40,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:40,973 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:41,014 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 01:46:41,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:41,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374914866] [2020-07-21 01:46:41,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:41,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:46:41,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416924060] [2020-07-21 01:46:41,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:46:41,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:46:41,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:41,045 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-07-21 01:46:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:41,267 INFO L93 Difference]: Finished difference Result 87 states and 154 transitions. [2020-07-21 01:46:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:46:41,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 01:46:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:41,283 INFO L225 Difference]: With dead ends: 87 [2020-07-21 01:46:41,283 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 01:46:41,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:46:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 01:46:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-07-21 01:46:41,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 01:46:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-07-21 01:46:41,360 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2020-07-21 01:46:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:41,361 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-07-21 01:46:41,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:46:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-07-21 01:46:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:46:41,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:41,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:41,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:41,579 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:41,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1106844324, now seen corresponding path program 1 times [2020-07-21 01:46:41,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:41,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089757335] [2020-07-21 01:46:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:41,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:46:41,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:41,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:46:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:41,633 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:41,657 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 01:46:41,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:41,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089757335] [2020-07-21 01:46:41,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:41,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:46:41,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001681719] [2020-07-21 01:46:41,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:46:41,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:41,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:46:41,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:41,662 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2020-07-21 01:46:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:41,791 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-07-21 01:46:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:46:41,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 01:46:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:41,795 INFO L225 Difference]: With dead ends: 54 [2020-07-21 01:46:41,796 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 01:46:41,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:46:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 01:46:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-07-21 01:46:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 01:46:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2020-07-21 01:46:41,817 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2020-07-21 01:46:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:41,818 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2020-07-21 01:46:41,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:46:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2020-07-21 01:46:41,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 01:46:41,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:41,819 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:42,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:42,033 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:42,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:42,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1247762898, now seen corresponding path program 1 times [2020-07-21 01:46:42,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:42,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849210672] [2020-07-21 01:46:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:42,074 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:42,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:42,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:46:42,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:42,089 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:42,110 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 01:46:42,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:42,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849210672] [2020-07-21 01:46:42,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:42,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:46:42,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009623934] [2020-07-21 01:46:42,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:46:42,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:42,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:46:42,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:42,114 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 5 states. [2020-07-21 01:46:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:42,253 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-21 01:46:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:46:42,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-21 01:46:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:42,255 INFO L225 Difference]: With dead ends: 56 [2020-07-21 01:46:42,256 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 01:46:42,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:46:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 01:46:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-21 01:46:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 01:46:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-07-21 01:46:42,270 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2020-07-21 01:46:42,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:42,270 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-07-21 01:46:42,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:46:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-07-21 01:46:42,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 01:46:42,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:42,272 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:42,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:42,486 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:42,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2050697988, now seen corresponding path program 1 times [2020-07-21 01:46:42,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:42,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375664853] [2020-07-21 01:46:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:46:42,521 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:42,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:42,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:46:42,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:42,544 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 01:46:42,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:42,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375664853] [2020-07-21 01:46:42,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:42,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 01:46:42,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026660258] [2020-07-21 01:46:42,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:46:42,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:42,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:46:42,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:46:42,567 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 6 states. [2020-07-21 01:46:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:42,763 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-07-21 01:46:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:46:42,763 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-21 01:46:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:42,765 INFO L225 Difference]: With dead ends: 60 [2020-07-21 01:46:42,765 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 01:46:42,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:46:42,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 01:46:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-21 01:46:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 01:46:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-07-21 01:46:42,795 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2020-07-21 01:46:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:42,796 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-07-21 01:46:42,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:46:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-07-21 01:46:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 01:46:42,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:42,801 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:43,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:43,015 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:43,016 INFO L82 PathProgramCache]: Analyzing trace with hash -35497745, now seen corresponding path program 1 times [2020-07-21 01:46:43,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:43,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655724657] [2020-07-21 01:46:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:46:43,067 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:43,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:43,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:46:43,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:43,089 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 01:46:43,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:43,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655724657] [2020-07-21 01:46:43,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:43,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:46:43,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250648831] [2020-07-21 01:46:43,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:46:43,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:43,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:46:43,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:43,106 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2020-07-21 01:46:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:43,220 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-07-21 01:46:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:46:43,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-21 01:46:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:43,222 INFO L225 Difference]: With dead ends: 65 [2020-07-21 01:46:43,223 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 01:46:43,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:46:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 01:46:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-07-21 01:46:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 01:46:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-07-21 01:46:43,238 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2020-07-21 01:46:43,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:43,238 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-07-21 01:46:43,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:46:43,239 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-07-21 01:46:43,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-21 01:46:43,240 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:43,241 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 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 01:46:43,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:43,451 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:43,451 INFO L82 PathProgramCache]: Analyzing trace with hash 663071772, now seen corresponding path program 1 times [2020-07-21 01:46:43,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:43,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553633727] [2020-07-21 01:46:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:46:43,502 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:43,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:43,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:46:43,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:43,540 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-21 01:46:43,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:43,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553633727] [2020-07-21 01:46:43,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:43,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 01:46:43,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744603014] [2020-07-21 01:46:43,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:46:43,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:43,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:46:43,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:46:43,572 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states. [2020-07-21 01:46:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:43,746 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-07-21 01:46:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:46:43,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-07-21 01:46:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:43,749 INFO L225 Difference]: With dead ends: 74 [2020-07-21 01:46:43,749 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 01:46:43,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:46:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 01:46:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-07-21 01:46:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 01:46:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-07-21 01:46:43,779 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2020-07-21 01:46:43,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:43,782 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-07-21 01:46:43,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:46:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-07-21 01:46:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 01:46:43,790 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:43,790 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:44,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:44,005 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:44,006 INFO L82 PathProgramCache]: Analyzing trace with hash -801825860, now seen corresponding path program 1 times [2020-07-21 01:46:44,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:44,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836951399] [2020-07-21 01:46:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:46:44,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:44,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:44,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:46:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:44,097 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-21 01:46:44,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:44,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836951399] [2020-07-21 01:46:44,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:44,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 01:46:44,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472790797] [2020-07-21 01:46:44,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:46:44,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:44,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:46:44,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:46:44,123 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 7 states. [2020-07-21 01:46:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:44,339 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-21 01:46:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:46:44,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-07-21 01:46:44,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:44,341 INFO L225 Difference]: With dead ends: 74 [2020-07-21 01:46:44,341 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 01:46:44,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:46:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 01:46:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-07-21 01:46:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 01:46:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-07-21 01:46:44,353 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2020-07-21 01:46:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:44,354 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-07-21 01:46:44,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:46:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-07-21 01:46:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 01:46:44,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:44,357 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:44,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:44,570 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:44,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1730547273, now seen corresponding path program 1 times [2020-07-21 01:46:44,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:44,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117846133] [2020-07-21 01:46:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:46:44,618 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:44,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:44,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:46:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:44,682 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-21 01:46:44,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:44,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117846133] [2020-07-21 01:46:44,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:44,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 01:46:44,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353519624] [2020-07-21 01:46:44,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:46:44,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:44,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:46:44,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:46:44,714 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states. [2020-07-21 01:46:44,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:44,911 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-07-21 01:46:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:46:44,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-07-21 01:46:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:44,912 INFO L225 Difference]: With dead ends: 72 [2020-07-21 01:46:44,913 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:46:44,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:46:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:46:44,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:46:44,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:46:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:46:44,915 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-07-21 01:46:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:44,915 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:46:44,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:46:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:46:44,916 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:46:45,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:45,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:46:45,694 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:46:45,695 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:46:45,695 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:46:45,695 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:46:45,695 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:46:45,695 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:46:45,696 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:46:45,696 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 01:46:45,696 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:46:45,696 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:46:45,696 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 01:46:45,696 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-21 01:46:45,696 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 56) no Hoare annotation was computed. [2020-07-21 01:46:45,697 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 54) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-07-21 01:46:45,697 INFO L268 CegarLoopResult]: For program point L23-3(lines 23 54) no Hoare annotation was computed. [2020-07-21 01:46:45,699 INFO L264 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 01:46:45,699 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 01:46:45,699 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-07-21 01:46:45,700 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-21 01:46:45,700 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 53) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 01:46:45,700 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-21 01:46:45,700 INFO L268 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed. [2020-07-21 01:46:45,702 INFO L264 CegarLoopResult]: At program point L45(lines 25 52) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 01:46:45,702 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 01:46:45,703 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 01:46:45,703 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 01:46:45,704 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 01:46:45,704 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 01:46:45,704 INFO L268 CegarLoopResult]: For program point L25(lines 25 52) no Hoare annotation was computed. [2020-07-21 01:46:45,704 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 01:46:45,704 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 56) no Hoare annotation was computed. [2020-07-21 01:46:45,706 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-07-21 01:46:45,706 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-07-21 01:46:45,706 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 01:46:45,706 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 56) the Hoare annotation is: true [2020-07-21 01:46:45,707 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 01:46:45,707 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 01:46:45,707 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 01:46:45,707 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 01:46:45,707 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 01:46:45,708 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 01:46:45,708 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 01:46:45,708 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 01:46:45,708 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 01:46:45,708 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 01:46:45,708 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 01:46:45,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:46:45 BoogieIcfgContainer [2020-07-21 01:46:45,742 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:46:45,748 INFO L168 Benchmark]: Toolchain (without parser) took 5867.75 ms. Allocated memory was 138.4 MB in the beginning and 246.9 MB in the end (delta: 108.5 MB). Free memory was 103.0 MB in the beginning and 221.1 MB in the end (delta: -118.1 MB). Peak memory consumption was 114.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:46:45,756 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 01:46:45,757 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.72 ms. Allocated memory is still 138.4 MB. Free memory was 102.5 MB in the beginning and 92.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:46:45,758 INFO L168 Benchmark]: Boogie Preprocessor took 135.21 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.4 MB in the beginning and 180.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:46:45,758 INFO L168 Benchmark]: RCFGBuilder took 358.00 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 164.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:46:45,761 INFO L168 Benchmark]: TraceAbstraction took 5067.82 ms. Allocated memory was 202.4 MB in the beginning and 246.9 MB in the end (delta: 44.6 MB). Free memory was 164.3 MB in the beginning and 221.1 MB in the end (delta: -56.7 MB). Peak memory consumption was 111.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:46:45,774 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 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.72 ms. Allocated memory is still 138.4 MB. Free memory was 102.5 MB in the beginning and 92.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.21 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.4 MB in the beginning and 180.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.00 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 164.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5067.82 ms. Allocated memory was 202.4 MB in the beginning and 246.9 MB in the end (delta: 44.6 MB). Free memory was 164.3 MB in the beginning and 221.1 MB in the end (delta: -56.7 MB). Peak memory consumption was 111.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 24]: Loop Invariant Derived loop invariant: (0 <= i && limit + 4 <= bufsize) && 0 <= j - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((0 <= i && limit + 4 <= bufsize) && 0 <= j) && i < len) && j + 5 <= bufsize - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 395 SDtfs, 108 SDslu, 1010 SDs, 0 SdLazy, 525 SolverSat, 129 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, 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, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 360 HoareAnnotationTreeSize, 55 FomulaSimplifications, 413 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 23 FomulaSimplificationsInter, 169 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 264 NumberOfCodeBlocks, 262 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 23214 SizeOfPredicates, 19 NumberOfNonLiveVariables, 600 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 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...