/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:55:45,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:55:45,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:55:45,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:55:45,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:55:45,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:55:45,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:55:45,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:55:45,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:55:45,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:55:45,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:55:45,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:55:45,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:55:45,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:55:45,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:55:45,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:55:45,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:55:45,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:55:45,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:55:45,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:55:45,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:55:46,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:55:46,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:55:46,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:55:46,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:55:46,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:55:46,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:55:46,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:55:46,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:55:46,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:55:46,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:55:46,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:55:46,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:55:46,032 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:55:46,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:55:46,032 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:55:46,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:55:46,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:55:46,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:55:46,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:55:46,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:55:46,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:55:46,033 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:55:46,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:55:46,034 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:55:46,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:55:46,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:55:46,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:55:46,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:55:46,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:55:46,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:55:46,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:55:46,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:55:46,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:55:46,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:55:46,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:46,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:55:46,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:55:46,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:55:46,364 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:55:46,386 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:55:46,390 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:55:46,395 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:55:46,398 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:55:46,399 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-07-21 16:55:46,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23b8dfa44/dfc719b5e3b4418681e06e4957a85a4d/FLAGf6992a29b [2020-07-21 16:55:46,965 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:55:46,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-07-21 16:55:46,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23b8dfa44/dfc719b5e3b4418681e06e4957a85a4d/FLAGf6992a29b [2020-07-21 16:55:47,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23b8dfa44/dfc719b5e3b4418681e06e4957a85a4d [2020-07-21 16:55:47,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:55:47,344 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:55:47,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:55:47,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:55:47,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:55:47,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:55:47" (1/1) ... [2020-07-21 16:55:47,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cbc74e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:47, skipping insertion in model container [2020-07-21 16:55:47,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:55:47" (1/1) ... [2020-07-21 16:55:47,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:55:47,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:55:47,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:55:47,573 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:55:47,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:55:47,606 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:55:47,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:47 WrapperNode [2020-07-21 16:55:47,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:55:47,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:55:47,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:55:47,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:55:47,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:47" (1/1) ... [2020-07-21 16:55:47,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:47" (1/1) ... [2020-07-21 16:55:47,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:47" (1/1) ... [2020-07-21 16:55:47,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:47" (1/1) ... [2020-07-21 16:55:47,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:47" (1/1) ... [2020-07-21 16:55:47,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:47" (1/1) ... [2020-07-21 16:55:47,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:47" (1/1) ... [2020-07-21 16:55:47,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:55:47,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:55:47,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:55:47,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:55:47,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:55:47,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:55:47,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:55:47,803 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:55:47,803 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:55:47,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:55:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:55:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:55:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:55:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:55:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:55:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:55:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:55:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:55:48,140 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:55:48,140 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 16:55:48,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:55:48 BoogieIcfgContainer [2020-07-21 16:55:48,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:55:48,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:55:48,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:55:48,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:55:48,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:55:47" (1/3) ... [2020-07-21 16:55:48,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba32e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:55:48, skipping insertion in model container [2020-07-21 16:55:48,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:47" (2/3) ... [2020-07-21 16:55:48,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba32e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:55:48, skipping insertion in model container [2020-07-21 16:55:48,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:55:48" (3/3) ... [2020-07-21 16:55:48,155 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2020-07-21 16:55:48,166 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:55:48,174 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:55:48,186 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:55:48,213 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:55:48,213 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:55:48,213 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:55:48,213 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:55:48,213 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:55:48,214 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:55:48,214 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:55:48,214 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:55:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-07-21 16:55:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:55:48,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:55:48,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:55:48,244 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:55:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:55:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1128800291, now seen corresponding path program 1 times [2020-07-21 16:55:48,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:55:48,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289979024] [2020-07-21 16:55:48,258 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:48,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:55:48,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:55:48,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:55:48,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:55:48,420 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:55:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:55:48,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:55:48,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289979024] [2020-07-21 16:55:48,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:55:48,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:55:48,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281446744] [2020-07-21 16:55:48,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:55:48,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:55:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:55:48,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:55:48,487 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-07-21 16:55:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:55:48,696 INFO L93 Difference]: Finished difference Result 87 states and 154 transitions. [2020-07-21 16:55:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:55:48,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 16:55:48,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:55:48,711 INFO L225 Difference]: With dead ends: 87 [2020-07-21 16:55:48,711 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 16:55:48,716 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 16:55:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 16:55:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-07-21 16:55:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 16:55:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-07-21 16:55:48,780 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2020-07-21 16:55:48,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:55:48,780 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-07-21 16:55:48,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:55:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-07-21 16:55:48,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:55:48,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:55:48,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:55:48,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:48,999 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:55:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:55:49,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1106844324, now seen corresponding path program 1 times [2020-07-21 16:55:49,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:55:49,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085378450] [2020-07-21 16:55:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:49,033 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:55:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:55:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:55:49,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:55:49,047 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:55:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:55:49,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:55:49,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085378450] [2020-07-21 16:55:49,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:55:49,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:55:49,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935902336] [2020-07-21 16:55:49,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:55:49,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:55:49,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:55:49,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:55:49,070 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2020-07-21 16:55:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:55:49,178 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-07-21 16:55:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:55:49,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 16:55:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:55:49,183 INFO L225 Difference]: With dead ends: 54 [2020-07-21 16:55:49,183 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 16:55:49,184 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 16:55:49,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 16:55:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-07-21 16:55:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 16:55:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2020-07-21 16:55:49,200 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2020-07-21 16:55:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:55:49,200 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2020-07-21 16:55:49,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:55:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2020-07-21 16:55:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 16:55:49,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:55:49,202 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 16:55:49,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:49,416 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:55:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:55:49,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1247762898, now seen corresponding path program 1 times [2020-07-21 16:55:49,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:55:49,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352002887] [2020-07-21 16:55:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:49,460 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:55:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:55:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:55:49,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:55:49,494 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:55:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:55:49,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:55:49,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352002887] [2020-07-21 16:55:49,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:55:49,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:55:49,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750033727] [2020-07-21 16:55:49,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:55:49,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:55:49,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:55:49,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:55:49,532 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 5 states. [2020-07-21 16:55:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:55:49,696 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-21 16:55:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:55:49,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-21 16:55:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:55:49,698 INFO L225 Difference]: With dead ends: 56 [2020-07-21 16:55:49,698 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 16:55:49,699 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 16:55:49,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 16:55:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-21 16:55:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 16:55:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-07-21 16:55:49,744 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2020-07-21 16:55:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:55:49,745 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-07-21 16:55:49,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:55:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-07-21 16:55:49,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 16:55:49,748 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:55:49,748 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 16:55:49,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:49,963 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:55:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:55:49,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2050697988, now seen corresponding path program 1 times [2020-07-21 16:55:49,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:55:49,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872793174] [2020-07-21 16:55:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:49,999 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:55:49,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:55:50,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:55:50,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:55:50,020 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:55:50,035 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 16:55:50,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:55:50,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872793174] [2020-07-21 16:55:50,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:55:50,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:55:50,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460431668] [2020-07-21 16:55:50,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:55:50,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:55:50,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:55:50,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:55:50,038 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 6 states. [2020-07-21 16:55:50,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:55:50,177 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-07-21 16:55:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:55:50,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-21 16:55:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:55:50,179 INFO L225 Difference]: With dead ends: 60 [2020-07-21 16:55:50,179 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 16:55:50,180 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 16:55:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 16:55:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-21 16:55:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 16:55:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-07-21 16:55:50,192 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2020-07-21 16:55:50,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:55:50,192 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-07-21 16:55:50,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:55:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-07-21 16:55:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 16:55:50,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:55:50,194 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 16:55:50,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:50,408 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:55:50,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:55:50,408 INFO L82 PathProgramCache]: Analyzing trace with hash -35497745, now seen corresponding path program 1 times [2020-07-21 16:55:50,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:55:50,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259917304] [2020-07-21 16:55:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:50,436 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:55:50,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:55:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:55:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:55:50,455 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:55:50,477 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 16:55:50,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:55:50,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259917304] [2020-07-21 16:55:50,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:55:50,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:55:50,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115644782] [2020-07-21 16:55:50,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:55:50,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:55:50,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:55:50,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:55:50,480 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2020-07-21 16:55:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:55:50,577 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-07-21 16:55:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:55:50,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-21 16:55:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:55:50,579 INFO L225 Difference]: With dead ends: 65 [2020-07-21 16:55:50,579 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 16:55:50,580 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 16:55:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 16:55:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-07-21 16:55:50,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 16:55:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-07-21 16:55:50,591 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2020-07-21 16:55:50,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:55:50,591 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-07-21 16:55:50,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:55:50,592 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-07-21 16:55:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-21 16:55:50,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:55:50,594 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 16:55:50,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:50,801 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:55:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:55:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash 663071772, now seen corresponding path program 1 times [2020-07-21 16:55:50,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:55:50,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251515260] [2020-07-21 16:55:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:50,842 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:55:50,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:55:50,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:55:50,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:55:50,871 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:55:50,893 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 16:55:50,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:55:50,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251515260] [2020-07-21 16:55:50,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:55:50,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:55:50,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294392077] [2020-07-21 16:55:50,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:55:50,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:55:50,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:55:50,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:55:50,896 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states. [2020-07-21 16:55:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:55:51,050 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-07-21 16:55:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:55:51,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-07-21 16:55:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:55:51,052 INFO L225 Difference]: With dead ends: 74 [2020-07-21 16:55:51,052 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 16:55:51,053 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 16:55:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 16:55:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-07-21 16:55:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 16:55:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-07-21 16:55:51,065 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2020-07-21 16:55:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:55:51,066 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-07-21 16:55:51,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:55:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-07-21 16:55:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 16:55:51,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:55:51,069 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 16:55:51,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:51,272 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:55:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:55:51,272 INFO L82 PathProgramCache]: Analyzing trace with hash -801825860, now seen corresponding path program 1 times [2020-07-21 16:55:51,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:55:51,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102313086] [2020-07-21 16:55:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:51,311 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:55:51,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:55:51,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:55:51,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:55:51,377 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:55:51,399 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 16:55:51,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:55:51,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102313086] [2020-07-21 16:55:51,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:55:51,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 16:55:51,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698266046] [2020-07-21 16:55:51,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:55:51,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:55:51,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:55:51,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:55:51,402 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 7 states. [2020-07-21 16:55:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:55:51,610 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-21 16:55:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:55:51,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-07-21 16:55:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:55:51,612 INFO L225 Difference]: With dead ends: 74 [2020-07-21 16:55:51,612 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 16:55:51,613 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 16:55:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 16:55:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-07-21 16:55:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 16:55:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-07-21 16:55:51,632 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2020-07-21 16:55:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:55:51,634 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-07-21 16:55:51,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:55:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-07-21 16:55:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 16:55:51,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:55:51,641 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 16:55:51,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:51,853 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:55:51,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:55:51,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1730547273, now seen corresponding path program 1 times [2020-07-21 16:55:51,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:55:51,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133364678] [2020-07-21 16:55:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:51,905 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:55:51,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:55:51,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:55:51,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:55:51,942 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:55:51,960 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 16:55:51,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:55:51,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133364678] [2020-07-21 16:55:51,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:55:51,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 16:55:51,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757480337] [2020-07-21 16:55:51,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 16:55:51,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:55:51,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 16:55:51,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:55:51,963 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states. [2020-07-21 16:55:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:55:52,169 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-07-21 16:55:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:55:52,172 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-07-21 16:55:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:55:52,173 INFO L225 Difference]: With dead ends: 72 [2020-07-21 16:55:52,173 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:55:52,176 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 16:55:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:55:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:55:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:55:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:55:52,177 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-07-21 16:55:52,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:55:52,178 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:55:52,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 16:55:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:55:52,178 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:55:52,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:55:52,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:55:52,979 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 16:55:52,980 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:55:52,980 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:55:52,980 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:55:52,980 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:55:52,980 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:55:52,981 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:55:52,981 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 16:55:52,981 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:55:52,981 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:55:52,981 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 16:55:52,982 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-21 16:55:52,982 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 56) no Hoare annotation was computed. [2020-07-21 16:55:52,982 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 16:55:52,982 INFO L268 CegarLoopResult]: For program point L23-3(lines 23 54) no Hoare annotation was computed. [2020-07-21 16:55:52,985 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 16:55:52,985 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 16:55:52,985 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-07-21 16:55:52,985 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-21 16:55:52,985 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 16:55:52,985 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-21 16:55:52,986 INFO L268 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed. [2020-07-21 16:55:52,986 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 16:55:52,987 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 16:55:52,987 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 16:55:52,987 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 16:55:52,988 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 16:55:52,988 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 16:55:52,988 INFO L268 CegarLoopResult]: For program point L25(lines 25 52) no Hoare annotation was computed. [2020-07-21 16:55:52,988 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 16:55:52,989 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 56) no Hoare annotation was computed. [2020-07-21 16:55:52,990 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-07-21 16:55:52,991 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-07-21 16:55:52,991 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 16:55:52,991 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 56) the Hoare annotation is: true [2020-07-21 16:55:52,992 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 16:55:52,992 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 16:55:52,992 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 16:55:52,992 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 16:55:52,993 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 16:55:52,993 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 16:55:52,993 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 16:55:52,993 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 16:55:52,993 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 16:55:52,993 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 16:55:52,994 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 16:55:53,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:55:53 BoogieIcfgContainer [2020-07-21 16:55:53,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:55:53,024 INFO L168 Benchmark]: Toolchain (without parser) took 5678.99 ms. Allocated memory was 135.8 MB in the beginning and 251.7 MB in the end (delta: 115.9 MB). Free memory was 101.0 MB in the beginning and 104.3 MB in the end (delta: -3.3 MB). Peak memory consumption was 112.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:55:53,031 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 16:55:53,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.67 ms. Allocated memory is still 135.8 MB. Free memory was 100.6 MB in the beginning and 90.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:55:53,034 INFO L168 Benchmark]: Boogie Preprocessor took 122.68 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 90.5 MB in the beginning and 177.7 MB in the end (delta: -87.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:55:53,035 INFO L168 Benchmark]: RCFGBuilder took 414.40 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 161.5 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:55:53,037 INFO L168 Benchmark]: TraceAbstraction took 4873.49 ms. Allocated memory was 199.8 MB in the beginning and 251.7 MB in the end (delta: 51.9 MB). Free memory was 160.7 MB in the beginning and 104.3 MB in the end (delta: 56.4 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:55:53,048 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.67 ms. Allocated memory is still 135.8 MB. Free memory was 100.6 MB in the beginning and 90.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.68 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 90.5 MB in the beginning and 177.7 MB in the end (delta: -87.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 414.40 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 161.5 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4873.49 ms. Allocated memory was 199.8 MB in the beginning and 251.7 MB in the end (delta: 51.9 MB). Free memory was 160.7 MB in the beginning and 104.3 MB in the end (delta: 56.4 MB). Peak memory consumption was 108.3 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: 4.1s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 1.3s, 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, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s 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, 264 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 23190 SizeOfPredicates, 19 NumberOfNonLiveVariables, 602 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...