/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:06:28,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:06:28,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:06:28,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:06:28,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:06:28,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:06:28,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:06:28,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:06:28,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:06:28,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:06:28,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:06:28,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:06:28,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:06:28,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:06:28,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:06:28,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:06:28,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:06:28,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:06:28,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:06:28,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:06:28,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:06:28,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:06:28,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:06:28,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:06:28,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:06:28,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:06:28,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:06:28,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:06:28,776 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 [2020-07-20 13:06:28,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:06:28,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:06:28,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:06:28,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:06:28,793 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:06:28,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:06:28,793 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:06:28,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:06:28,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:06:28,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:06:28,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:06:28,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:06:28,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:06:28,794 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:06:28,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:06:28,795 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:06:28,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:06:28,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:06:28,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:06:28,796 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:06:28,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:06:28,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:06:28,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:06:28,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:06:28,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:06:28,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:06:28,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:28,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:06:28,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:06:28,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:06:29,085 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:06:29,099 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:06:29,102 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:06:29,104 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:06:29,104 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:06:29,105 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-20 13:06:29,169 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80678c258/b95b3f9c7be74baaa12405aa95c79ea4/FLAGbdcd48fcf [2020-07-20 13:06:29,611 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:06:29,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-20 13:06:29,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80678c258/b95b3f9c7be74baaa12405aa95c79ea4/FLAGbdcd48fcf [2020-07-20 13:06:29,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80678c258/b95b3f9c7be74baaa12405aa95c79ea4 [2020-07-20 13:06:29,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:06:29,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:06:29,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:29,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:06:29,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:06:29,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:29" (1/1) ... [2020-07-20 13:06:29,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5886e7ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:29, skipping insertion in model container [2020-07-20 13:06:29,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:29" (1/1) ... [2020-07-20 13:06:29,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:06:30,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:06:30,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:30,265 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:06:30,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:30,410 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:06:30,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:30 WrapperNode [2020-07-20 13:06:30,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:30,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:06:30,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:06:30,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:06:30,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:30" (1/1) ... [2020-07-20 13:06:30,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:30" (1/1) ... [2020-07-20 13:06:30,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:30" (1/1) ... [2020-07-20 13:06:30,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:30" (1/1) ... [2020-07-20 13:06:30,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:30" (1/1) ... [2020-07-20 13:06:30,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:30" (1/1) ... [2020-07-20 13:06:30,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:30" (1/1) ... [2020-07-20 13:06:30,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:06:30,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:06:30,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:06:30,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:06:30,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:30" (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 [2020-07-20 13:06:30,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:06:30,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:06:30,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 13:06:30,523 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-20 13:06:30,523 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-20 13:06:30,523 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-20 13:06:30,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:06:30,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:06:30,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 13:06:30,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 13:06:30,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 13:06:30,524 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-20 13:06:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-20 13:06:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-20 13:06:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:06:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:06:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:06:30,963 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:06:30,963 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 13:06:30,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:30 BoogieIcfgContainer [2020-07-20 13:06:30,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:06:30,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:06:30,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:06:30,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:06:30,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:06:29" (1/3) ... [2020-07-20 13:06:30,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df9341b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:30, skipping insertion in model container [2020-07-20 13:06:30,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:30" (2/3) ... [2020-07-20 13:06:30,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df9341b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:30, skipping insertion in model container [2020-07-20 13:06:30,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:30" (3/3) ... [2020-07-20 13:06:30,982 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-07-20 13:06:30,993 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:06:31,001 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:06:31,016 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:06:31,043 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:06:31,043 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:06:31,043 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:06:31,043 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:06:31,043 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:06:31,044 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:06:31,044 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:06:31,044 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:06:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-20 13:06:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 13:06:31,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:31,075 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:31,076 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:31,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-20 13:06:31,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:31,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915847499] [2020-07-20 13:06:31,094 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 [2020-07-20 13:06:31,230 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:31,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 13:06:31,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:31,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:31,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915847499] [2020-07-20 13:06:31,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:31,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:06:31,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574281427] [2020-07-20 13:06:31,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:06:31,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:31,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:06:31,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:06:31,335 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-07-20 13:06:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:31,514 INFO L93 Difference]: Finished difference Result 126 states and 192 transitions. [2020-07-20 13:06:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:06:31,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-20 13:06:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:31,535 INFO L225 Difference]: With dead ends: 126 [2020-07-20 13:06:31,536 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 13:06:31,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:06:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 13:06:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-07-20 13:06:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 13:06:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-07-20 13:06:31,594 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 48 [2020-07-20 13:06:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:31,595 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-07-20 13:06:31,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:06:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-07-20 13:06:31,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 13:06:31,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:31,600 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2020-07-20 13:06:31,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:31,814 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:31,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:31,814 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-07-20 13:06:31,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:31,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504503160] [2020-07-20 13:06:31,815 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 [2020-07-20 13:06:31,873 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 13:06:31,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:31,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:06:31,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:31,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:31,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504503160] [2020-07-20 13:06:31,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:31,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:06:31,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745864883] [2020-07-20 13:06:31,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:06:31,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:31,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:06:31,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:06:31,918 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 4 states. [2020-07-20 13:06:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:32,008 INFO L93 Difference]: Finished difference Result 113 states and 156 transitions. [2020-07-20 13:06:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:06:32,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-07-20 13:06:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:32,011 INFO L225 Difference]: With dead ends: 113 [2020-07-20 13:06:32,011 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 13:06:32,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:06:32,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 13:06:32,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-07-20 13:06:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 13:06:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2020-07-20 13:06:32,034 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 51 [2020-07-20 13:06:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:32,035 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2020-07-20 13:06:32,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:06:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2020-07-20 13:06:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 13:06:32,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:32,038 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1] [2020-07-20 13:06:32,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:32,253 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:32,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:32,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1437145176, now seen corresponding path program 1 times [2020-07-20 13:06:32,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:32,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019376463] [2020-07-20 13:06:32,256 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 [2020-07-20 13:06:32,311 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:32,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:32,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:06:32,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:32,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:32,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019376463] [2020-07-20 13:06:32,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:32,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:06:32,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869925022] [2020-07-20 13:06:32,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:06:32,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:32,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:06:32,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:06:32,356 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand 4 states. [2020-07-20 13:06:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:32,451 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2020-07-20 13:06:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:06:32,451 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-20 13:06:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:32,453 INFO L225 Difference]: With dead ends: 124 [2020-07-20 13:06:32,454 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 13:06:32,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:06:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 13:06:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-20 13:06:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 13:06:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2020-07-20 13:06:32,467 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 52 [2020-07-20 13:06:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:32,467 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2020-07-20 13:06:32,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:06:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2020-07-20 13:06:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 13:06:32,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:32,470 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1] [2020-07-20 13:06:32,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:32,685 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:32,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1843842924, now seen corresponding path program 1 times [2020-07-20 13:06:32,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:32,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677823732] [2020-07-20 13:06:32,687 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 [2020-07-20 13:06:32,743 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:32,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:32,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 13:06:32,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:32,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:32,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677823732] [2020-07-20 13:06:32,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:32,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:06:32,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064473225] [2020-07-20 13:06:32,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:06:32,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:32,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:06:32,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:06:32,778 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand 4 states. [2020-07-20 13:06:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:32,860 INFO L93 Difference]: Finished difference Result 128 states and 177 transitions. [2020-07-20 13:06:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:06:32,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-20 13:06:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:32,862 INFO L225 Difference]: With dead ends: 128 [2020-07-20 13:06:32,862 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 13:06:32,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:06:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 13:06:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-07-20 13:06:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 13:06:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-07-20 13:06:32,874 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 52 [2020-07-20 13:06:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:32,875 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-07-20 13:06:32,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:06:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-07-20 13:06:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 13:06:32,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:32,877 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1] [2020-07-20 13:06:33,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:33,093 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:33,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:33,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-07-20 13:06:33,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:33,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329954104] [2020-07-20 13:06:33,094 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 [2020-07-20 13:06:33,143 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:33,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:06:33,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:33,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:33,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329954104] [2020-07-20 13:06:33,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:33,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:06:33,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353447366] [2020-07-20 13:06:33,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:06:33,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:33,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:06:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:06:33,180 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 5 states. [2020-07-20 13:06:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:33,305 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2020-07-20 13:06:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:06:33,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-07-20 13:06:33,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:33,307 INFO L225 Difference]: With dead ends: 133 [2020-07-20 13:06:33,307 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 13:06:33,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:06:33,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 13:06:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-07-20 13:06:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 13:06:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2020-07-20 13:06:33,319 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 53 [2020-07-20 13:06:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:33,320 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2020-07-20 13:06:33,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:06:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2020-07-20 13:06:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 13:06:33,322 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:33,323 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:33,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:33,538 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-07-20 13:06:33,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:33,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327340681] [2020-07-20 13:06:33,539 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 [2020-07-20 13:06:33,586 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 13:06:33,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:33,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:06:33,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:33,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:06:33,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327340681] [2020-07-20 13:06:33,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:33,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 13:06:33,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588859824] [2020-07-20 13:06:33,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 13:06:33,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:33,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 13:06:33,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:06:33,733 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 8 states. [2020-07-20 13:06:33,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:33,841 INFO L93 Difference]: Finished difference Result 147 states and 206 transitions. [2020-07-20 13:06:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:06:33,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-07-20 13:06:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:33,843 INFO L225 Difference]: With dead ends: 147 [2020-07-20 13:06:33,843 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 13:06:33,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:06:33,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 13:06:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2020-07-20 13:06:33,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 13:06:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2020-07-20 13:06:33,856 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 54 [2020-07-20 13:06:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:33,857 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2020-07-20 13:06:33,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 13:06:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2020-07-20 13:06:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 13:06:33,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:33,859 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:34,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:34,073 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:34,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-07-20 13:06:34,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:34,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621977494] [2020-07-20 13:06:34,075 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 [2020-07-20 13:06:34,121 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:34,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:06:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:34,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:06:34,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621977494] [2020-07-20 13:06:34,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:34,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 13:06:34,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94185894] [2020-07-20 13:06:34,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:06:34,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:34,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:06:34,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:06:34,307 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 10 states. [2020-07-20 13:06:38,680 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 13:06:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:40,905 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-07-20 13:06:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:06:40,906 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-07-20 13:06:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:40,907 INFO L225 Difference]: With dead ends: 172 [2020-07-20 13:06:40,908 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 13:06:40,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=80, Invalid=129, Unknown=1, NotChecked=0, Total=210 [2020-07-20 13:06:40,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 13:06:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-07-20 13:06:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 13:06:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-07-20 13:06:40,921 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 56 [2020-07-20 13:06:40,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:40,922 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-07-20 13:06:40,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:06:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-07-20 13:06:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-20 13:06:40,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:40,923 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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] [2020-07-20 13:06:41,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:41,124 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:41,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:41,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 2 times [2020-07-20 13:06:41,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:41,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162502644] [2020-07-20 13:06:41,127 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 [2020-07-20 13:06:41,171 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:41,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:41,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:06:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:41,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:06:41,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162502644] [2020-07-20 13:06:41,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:41,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 13:06:41,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859366903] [2020-07-20 13:06:41,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 13:06:41,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:41,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 13:06:41,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:06:41,424 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 14 states. [2020-07-20 13:06:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:41,607 INFO L93 Difference]: Finished difference Result 210 states and 300 transitions. [2020-07-20 13:06:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 13:06:41,612 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-07-20 13:06:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:41,614 INFO L225 Difference]: With dead ends: 210 [2020-07-20 13:06:41,614 INFO L226 Difference]: Without dead ends: 144 [2020-07-20 13:06:41,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:06:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-20 13:06:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-07-20 13:06:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 13:06:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2020-07-20 13:06:41,651 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 130 transitions. Word has length 63 [2020-07-20 13:06:41,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:41,651 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 130 transitions. [2020-07-20 13:06:41,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 13:06:41,651 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 130 transitions. [2020-07-20 13:06:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 13:06:41,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:41,653 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 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] [2020-07-20 13:06:41,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:41,872 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:41,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 2 times [2020-07-20 13:06:41,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:41,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20054127] [2020-07-20 13:06:41,874 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:41,919 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:41,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:06:41,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:42,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:06:42,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20054127] [2020-07-20 13:06:42,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:42,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 13:06:42,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545047219] [2020-07-20 13:06:42,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:06:42,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:42,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:06:42,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:06:42,318 INFO L87 Difference]: Start difference. First operand 90 states and 130 transitions. Second operand 18 states. [2020-07-20 13:06:55,695 WARN L193 SmtUtils]: Spent 12.89 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 13:07:00,175 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 13:07:10,626 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-20 13:07:29,259 WARN L193 SmtUtils]: Spent 12.43 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 13:07:41,933 WARN L193 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 13:07:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:07:48,592 INFO L93 Difference]: Finished difference Result 242 states and 352 transitions. [2020-07-20 13:07:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 13:07:48,593 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-07-20 13:07:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:07:48,596 INFO L225 Difference]: With dead ends: 242 [2020-07-20 13:07:48,597 INFO L226 Difference]: Without dead ends: 162 [2020-07-20 13:07:48,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 65.7s TimeCoverageRelationStatistics Valid=316, Invalid=603, Unknown=11, NotChecked=0, Total=930 [2020-07-20 13:07:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-20 13:07:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-07-20 13:07:48,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 13:07:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 147 transitions. [2020-07-20 13:07:48,626 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 147 transitions. Word has length 68 [2020-07-20 13:07:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:07:48,627 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 147 transitions. [2020-07-20 13:07:48,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:07:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 147 transitions. [2020-07-20 13:07:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-20 13:07:48,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:07:48,630 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 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] [2020-07-20 13:07:48,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:48,843 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:07:48,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:07:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 3 times [2020-07-20 13:07:48,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:07:48,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621363481] [2020-07-20 13:07:48,844 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:48,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:07:48,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:07:48,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:07:48,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:07:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:07:49,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:07:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:07:49,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621363481] [2020-07-20 13:07:49,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:07:49,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 13:07:49,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458828478] [2020-07-20 13:07:49,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 13:07:49,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:07:49,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 13:07:49,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:07:49,588 INFO L87 Difference]: Start difference. First operand 100 states and 147 transitions. Second operand 26 states. [2020-07-20 13:07:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:07:50,013 INFO L93 Difference]: Finished difference Result 336 states and 488 transitions. [2020-07-20 13:07:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 13:07:50,015 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-07-20 13:07:50,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:07:50,017 INFO L225 Difference]: With dead ends: 336 [2020-07-20 13:07:50,017 INFO L226 Difference]: Without dead ends: 246 [2020-07-20 13:07:50,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 13:07:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-20 13:07:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2020-07-20 13:07:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-20 13:07:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 190 transitions. [2020-07-20 13:07:50,036 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 190 transitions. Word has length 81 [2020-07-20 13:07:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:07:50,037 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 190 transitions. [2020-07-20 13:07:50,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 13:07:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 190 transitions. [2020-07-20 13:07:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-20 13:07:50,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:07:50,038 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 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] [2020-07-20 13:07:50,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:50,252 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:07:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:07:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash -316492522, now seen corresponding path program 3 times [2020-07-20 13:07:50,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:07:50,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991024026] [2020-07-20 13:07:50,253 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:50,303 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:07:50,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:07:50,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 13:07:50,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:07:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:07:50,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:07:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:07:51,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991024026] [2020-07-20 13:07:51,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:07:51,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-20 13:07:51,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068151370] [2020-07-20 13:07:51,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 13:07:51,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:07:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 13:07:51,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 13:07:51,514 INFO L87 Difference]: Start difference. First operand 126 states and 190 transitions. Second operand 34 states. [2020-07-20 13:08:27,148 WARN L193 SmtUtils]: Spent 25.64 s on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2020-07-20 13:08:47,924 WARN L193 SmtUtils]: Spent 9.43 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-20 13:09:11,026 WARN L193 SmtUtils]: Spent 12.43 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 13:09:31,441 WARN L193 SmtUtils]: Spent 8.39 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 13:10:00,930 WARN L193 SmtUtils]: Spent 12.52 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-20 13:10:26,661 WARN L193 SmtUtils]: Spent 16.58 s on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-07-20 13:10:43,678 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 13:10:59,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:10:59,407 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2020-07-20 13:10:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-20 13:10:59,409 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2020-07-20 13:10:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:10:59,412 INFO L225 Difference]: With dead ends: 346 [2020-07-20 13:10:59,412 INFO L226 Difference]: Without dead ends: 230 [2020-07-20 13:10:59,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 178.3s TimeCoverageRelationStatistics Valid=926, Invalid=2232, Unknown=34, NotChecked=0, Total=3192 [2020-07-20 13:10:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-20 13:10:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 130. [2020-07-20 13:10:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-20 13:10:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 197 transitions. [2020-07-20 13:10:59,429 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 197 transitions. Word has length 92 [2020-07-20 13:10:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:10:59,430 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 197 transitions. [2020-07-20 13:10:59,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 13:10:59,430 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 197 transitions. [2020-07-20 13:10:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 13:10:59,431 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:10:59,432 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 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] [2020-07-20 13:10:59,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:59,646 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:10:59,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:10:59,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1829248710, now seen corresponding path program 4 times [2020-07-20 13:10:59,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:10:59,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12813032] [2020-07-20 13:10:59,647 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:59,700 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:10:59,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:10:59,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 13:10:59,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:11:00,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:11:02,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12813032] [2020-07-20 13:11:02,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:02,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-20 13:11:02,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994352430] [2020-07-20 13:11:02,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 13:11:02,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:02,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 13:11:02,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 13:11:02,116 INFO L87 Difference]: Start difference. First operand 130 states and 197 transitions. Second operand 50 states. [2020-07-20 13:11:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:03,358 INFO L93 Difference]: Finished difference Result 570 states and 840 transitions. [2020-07-20 13:11:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-20 13:11:03,359 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 117 [2020-07-20 13:11:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:03,364 INFO L225 Difference]: With dead ends: 570 [2020-07-20 13:11:03,365 INFO L226 Difference]: Without dead ends: 450 [2020-07-20 13:11:03,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 13:11:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-20 13:11:03,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 198. [2020-07-20 13:11:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 13:11:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 310 transitions. [2020-07-20 13:11:03,402 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 310 transitions. Word has length 117 [2020-07-20 13:11:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:03,403 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 310 transitions. [2020-07-20 13:11:03,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 13:11:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 310 transitions. [2020-07-20 13:11:03,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 13:11:03,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:03,405 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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] [2020-07-20 13:11:03,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:03,620 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:03,621 INFO L82 PathProgramCache]: Analyzing trace with hash -552090314, now seen corresponding path program 4 times [2020-07-20 13:11:03,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:03,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888050962] [2020-07-20 13:11:03,622 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:03,734 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:11:03,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:03,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:11:03,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-20 13:11:03,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:03,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888050962] [2020-07-20 13:11:03,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:11:03,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 13:11:03,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427948973] [2020-07-20 13:11:03,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:11:03,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:03,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:11:03,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:11:03,849 INFO L87 Difference]: Start difference. First operand 198 states and 310 transitions. Second operand 6 states. [2020-07-20 13:11:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:03,923 INFO L93 Difference]: Finished difference Result 227 states and 350 transitions. [2020-07-20 13:11:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:11:03,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-07-20 13:11:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:03,927 INFO L225 Difference]: With dead ends: 227 [2020-07-20 13:11:03,927 INFO L226 Difference]: Without dead ends: 204 [2020-07-20 13:11:03,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:11:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-20 13:11:03,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 198. [2020-07-20 13:11:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 13:11:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2020-07-20 13:11:03,943 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 122 [2020-07-20 13:11:03,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:03,943 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2020-07-20 13:11:03,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:11:03,944 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2020-07-20 13:11:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 13:11:03,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:03,946 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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, 1, 1, 1, 1] [2020-07-20 13:11:04,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:04,150 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:04,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash 574571712, now seen corresponding path program 1 times [2020-07-20 13:11:04,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:04,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582166616] [2020-07-20 13:11:04,152 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:04,250 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:04,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:04,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:11:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 13:11:04,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:11:04,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582166616] [2020-07-20 13:11:04,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:11:04,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:11:04,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322182510] [2020-07-20 13:11:04,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:11:04,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:04,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:11:04,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:11:04,291 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand 4 states. [2020-07-20 13:11:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:04,318 INFO L93 Difference]: Finished difference Result 210 states and 321 transitions. [2020-07-20 13:11:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:11:04,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-07-20 13:11:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:04,321 INFO L225 Difference]: With dead ends: 210 [2020-07-20 13:11:04,321 INFO L226 Difference]: Without dead ends: 198 [2020-07-20 13:11:04,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:11:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-20 13:11:04,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-20 13:11:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 13:11:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 307 transitions. [2020-07-20 13:11:04,344 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 307 transitions. Word has length 126 [2020-07-20 13:11:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:04,344 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 307 transitions. [2020-07-20 13:11:04,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:11:04,344 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 307 transitions. [2020-07-20 13:11:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 13:11:04,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:04,346 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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, 1, 1, 1, 1] [2020-07-20 13:11:04,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:04,548 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:04,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1419572994, now seen corresponding path program 1 times [2020-07-20 13:11:04,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:04,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565390489] [2020-07-20 13:11:04,549 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:04,634 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:11:04,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:04,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 13:11:04,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-20 13:11:04,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:05,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565390489] [2020-07-20 13:11:05,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:11:05,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 13:11:05,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409376458] [2020-07-20 13:11:05,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:11:05,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:05,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:11:05,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:11:05,024 INFO L87 Difference]: Start difference. First operand 198 states and 307 transitions. Second operand 9 states. [2020-07-20 13:11:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:05,248 INFO L93 Difference]: Finished difference Result 227 states and 345 transitions. [2020-07-20 13:11:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:11:05,249 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 126 [2020-07-20 13:11:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:05,251 INFO L225 Difference]: With dead ends: 227 [2020-07-20 13:11:05,251 INFO L226 Difference]: Without dead ends: 198 [2020-07-20 13:11:05,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:11:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-20 13:11:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2020-07-20 13:11:05,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-20 13:11:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 294 transitions. [2020-07-20 13:11:05,270 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 294 transitions. Word has length 126 [2020-07-20 13:11:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:05,270 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 294 transitions. [2020-07-20 13:11:05,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:11:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 294 transitions. [2020-07-20 13:11:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 13:11:05,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:05,272 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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, 1, 1, 1, 1] [2020-07-20 13:11:05,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:05,486 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:05,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:05,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-07-20 13:11:05,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:05,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140039442] [2020-07-20 13:11:05,487 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:05,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:05,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:05,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:11:05,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 13:11:05,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:11:05,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140039442] [2020-07-20 13:11:05,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:11:05,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:11:05,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786659443] [2020-07-20 13:11:05,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:11:05,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:05,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:11:05,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:11:05,632 INFO L87 Difference]: Start difference. First operand 192 states and 294 transitions. Second operand 6 states. [2020-07-20 13:11:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:05,679 INFO L93 Difference]: Finished difference Result 198 states and 299 transitions. [2020-07-20 13:11:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:11:05,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-20 13:11:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:05,683 INFO L225 Difference]: With dead ends: 198 [2020-07-20 13:11:05,684 INFO L226 Difference]: Without dead ends: 192 [2020-07-20 13:11:05,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:11:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-20 13:11:05,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-07-20 13:11:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-20 13:11:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 293 transitions. [2020-07-20 13:11:05,699 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 293 transitions. Word has length 126 [2020-07-20 13:11:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:05,699 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 293 transitions. [2020-07-20 13:11:05,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:11:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 293 transitions. [2020-07-20 13:11:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 13:11:05,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:05,701 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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, 1, 1, 1, 1] [2020-07-20 13:11:05,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:05,916 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-07-20 13:11:05,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:05,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350436335] [2020-07-20 13:11:05,918 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:05,993 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:05,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:05,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:11:05,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 13:11:06,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:11:06,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350436335] [2020-07-20 13:11:06,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:11:06,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:11:06,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379088441] [2020-07-20 13:11:06,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:11:06,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:06,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:11:06,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:11:06,033 INFO L87 Difference]: Start difference. First operand 192 states and 293 transitions. Second operand 6 states. [2020-07-20 13:11:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:06,065 INFO L93 Difference]: Finished difference Result 192 states and 293 transitions. [2020-07-20 13:11:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:11:06,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-20 13:11:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:06,067 INFO L225 Difference]: With dead ends: 192 [2020-07-20 13:11:06,067 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:11:06,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:11:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:11:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:11:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:11:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:11:06,069 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 126 [2020-07-20 13:11:06,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:06,069 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:11:06,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:11:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:11:06,070 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:11:06,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:06,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:11:06,716 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 365 [2020-07-20 13:11:06,838 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 365 [2020-07-20 13:11:06,961 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 365 [2020-07-20 13:11:07,732 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 665 DAG size of output: 20 [2020-07-20 13:11:07,750 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:11:07,750 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:11:07,750 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-20 13:11:07,750 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-20 13:11:07,750 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (or (and (= 0 base2flt_~__retres4~0) (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|)) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2020-07-20 13:11:07,750 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-20 13:11:07,750 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-20 13:11:07,751 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-20 13:11:07,751 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (or (< (mod base2flt_~m 4294967296) 16777216) (not (= 1 |base2flt_#in~m|))) (<= base2flt_~e |base2flt_#in~e|)) [2020-07-20 13:11:07,751 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-20 13:11:07,751 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-20 13:11:07,751 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-20 13:11:07,751 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-20 13:11:07,751 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-20 13:11:07,751 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= 16777216 (mod |base2flt_#in~m| 4294967296)) (<= |base2flt_#in~e| base2flt_~e)) [2020-07-20 13:11:07,751 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-20 13:11:07,751 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-20 13:11:07,752 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-20 13:11:07,752 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-20 13:11:07,752 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-20 13:11:07,752 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-20 13:11:07,752 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-20 13:11:07,752 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-20 13:11:07,752 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-20 13:11:07,752 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-20 13:11:07,752 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (or (and (= mulflt_~b |mulflt_#in~b|) (= 0 mulflt_~__retres10~1)) (exists ((v_mulflt_~a_38 Int)) (< (mod v_mulflt_~a_38 4294967296) (mod |mulflt_#in~b| 4294967296)))) [2020-07-20 13:11:07,752 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-20 13:11:07,753 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:11:07,753 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:11:07,753 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:11:07,753 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:11:07,753 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-20 13:11:07,753 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-20 13:11:07,753 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-20 13:11:07,753 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-20 13:11:07,753 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-20 13:11:07,753 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-20 13:11:07,753 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-20 13:11:07,753 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-20 13:11:07,754 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-20 13:11:07,754 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 13:11:07,754 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-20 13:11:07,754 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-20 13:11:07,754 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-20 13:11:07,754 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-20 13:11:07,754 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-20 13:11:07,754 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (= 0 main_~zero~0) (= 0 main_~tmp___0~0) (<= (mod main_~b~0 4294967296) 0) (= 0 main_~tmp___1~0)) [2020-07-20 13:11:07,755 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-20 13:11:07,755 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 13:11:07,755 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (and .cse0 (<= (mod main_~b~0 4294967296) 0)) (and .cse0 (<= 1 main_~tmp~2) (<= 1 main_~sb~0)))) [2020-07-20 13:11:07,755 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-20 13:11:07,755 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 13:11:07,755 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-20 13:11:07,755 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-20 13:11:07,756 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-20 13:11:07,756 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-20 13:11:07,756 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-20 13:11:07,756 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-20 13:11:07,756 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-20 13:11:07,756 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-20 13:11:07,756 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-20 13:11:07,757 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-20 13:11:07,757 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-20 13:11:07,757 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-20 13:11:07,757 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-20 13:11:07,757 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-20 13:11:07,757 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-20 13:11:07,757 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-20 13:11:07,757 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-20 13:11:07,758 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-20 13:11:07,758 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-20 13:11:07,758 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-20 13:11:07,776 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_38,QUANTIFIED] [2020-07-20 13:11:07,777 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_38,QUANTIFIED] [2020-07-20 13:11:07,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:11:07 BoogieIcfgContainer [2020-07-20 13:11:07,780 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:11:07,782 INFO L168 Benchmark]: Toolchain (without parser) took 277815.83 ms. Allocated memory was 145.8 MB in the beginning and 293.1 MB in the end (delta: 147.3 MB). Free memory was 103.4 MB in the beginning and 154.1 MB in the end (delta: -50.7 MB). Peak memory consumption was 151.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:07,782 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 13:11:07,783 INFO L168 Benchmark]: CACSL2BoogieTranslator took 443.25 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 103.0 MB in the beginning and 181.8 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:07,783 INFO L168 Benchmark]: Boogie Preprocessor took 42.29 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 179.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:07,784 INFO L168 Benchmark]: RCFGBuilder took 516.57 ms. Allocated memory is still 203.4 MB. Free memory was 179.8 MB in the beginning and 154.2 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:07,785 INFO L168 Benchmark]: TraceAbstraction took 276808.39 ms. Allocated memory was 203.4 MB in the beginning and 293.1 MB in the end (delta: 89.7 MB). Free memory was 154.2 MB in the beginning and 154.1 MB in the end (delta: 39.1 kB). Peak memory consumption was 144.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:07,787 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 443.25 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 103.0 MB in the beginning and 181.8 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.29 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 179.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 516.57 ms. Allocated memory is still 203.4 MB. Free memory was 179.8 MB in the beginning and 154.2 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 276808.39 ms. Allocated memory was 203.4 MB in the beginning and 293.1 MB in the end (delta: 89.7 MB). Free memory was 154.2 MB in the beginning and 154.1 MB in the end (delta: 39.1 kB). Peak memory consumption was 144.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_38,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_38,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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: 25]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) || !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 147]: Loop Invariant [2020-07-20 13:11:07,793 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_38,QUANTIFIED] [2020-07-20 13:11:07,794 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_38,QUANTIFIED] Derived loop invariant: (b == \old(b) && 0 == __retres10) || (\exists v_mulflt_~a_38 : int :: v_mulflt_~a_38 % 4294967296 < \old(b) % 4294967296) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 16777216 <= \old(m) % 4294967296 && \old(e) <= e - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (!(\old(m) % 4294967296 <= 0) && (m % 4294967296 < 16777216 || !(1 == \old(m)))) && e <= \old(e) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 275.2s, OverallIterations: 17, TraceHistogramMax: 24, AutomataDifference: 263.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1170 SDtfs, 2754 SDslu, 5466 SDs, 0 SdLazy, 3040 SolverSat, 376 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 11.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2123 GetRequests, 1835 SyntacticMatches, 10 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 254.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=198occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 701 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 202 PreInvPairs, 608 NumberOfFragments, 123 HoareAnnotationTreeSize, 202 FomulaSimplifications, 5068 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 18 FomulaSimplificationsInter, 5905 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 1413 NumberOfCodeBlocks, 940 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 1920 ConstructedInterpolants, 4 QuantifiedInterpolants, 436144 SizeOfPredicates, 26 NumberOfNonLiveVariables, 3045 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 24 InterpolantComputations, 8 PerfectInterpolantSequences, 4786/7342 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...