/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_security.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:56:49,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:56:49,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:56:49,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:56:49,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:56:49,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:56:49,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:56:49,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:56:49,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:56:49,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:56:49,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:56:49,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:56:49,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:56:49,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:56:49,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:56:49,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:56:49,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:56:49,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:56:49,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:56:49,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:56:49,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:56:49,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:56:49,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:56:49,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:56:49,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:56:49,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:56:49,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:56:49,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:56:49,323 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 13:56:49,339 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:56:49,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:56:49,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:56:49,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:56:49,341 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:56:49,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:56:49,341 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:56:49,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:56:49,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:56:49,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:56:49,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:56:49,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:56:49,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:56:49,342 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:56:49,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:56:49,343 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:56:49,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:56:49,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:56:49,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:56:49,344 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:56:49,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:56:49,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:56:49,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:56:49,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:56:49,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:56:49,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:56:49,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:49,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:56:49,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:56:49,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:56:49,628 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:56:49,641 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:56:49,645 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:56:49,646 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:56:49,647 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:56:49,648 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_security.c [2020-07-21 13:56:49,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24b28d1bf/e0d0379aef914114af2b6abe046f7e1b/FLAG0a4a037b9 [2020-07-21 13:56:50,177 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:56:50,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_security.c [2020-07-21 13:56:50,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24b28d1bf/e0d0379aef914114af2b6abe046f7e1b/FLAG0a4a037b9 [2020-07-21 13:56:50,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24b28d1bf/e0d0379aef914114af2b6abe046f7e1b [2020-07-21 13:56:50,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:56:50,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:56:50,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:56:50,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:56:50,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:56:50,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:56:50" (1/1) ... [2020-07-21 13:56:50,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ba0086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:50, skipping insertion in model container [2020-07-21 13:56:50,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:56:50" (1/1) ... [2020-07-21 13:56:50,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:56:50,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:56:50,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:56:50,894 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:56:50,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:56:51,047 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:56:51,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:51 WrapperNode [2020-07-21 13:56:51,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:56:51,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:56:51,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:56:51,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:56:51,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:51" (1/1) ... [2020-07-21 13:56:51,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:51" (1/1) ... [2020-07-21 13:56:51,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:51" (1/1) ... [2020-07-21 13:56:51,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:51" (1/1) ... [2020-07-21 13:56:51,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:51" (1/1) ... [2020-07-21 13:56:51,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:51" (1/1) ... [2020-07-21 13:56:51,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:51" (1/1) ... [2020-07-21 13:56:51,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:56:51,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:56:51,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:56:51,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:56:51,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:56:51,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:56:51,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:56:51,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:56:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:56:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:56:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:56:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:56:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:56:51,650 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:56:51,650 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-21 13:56:51,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:56:51 BoogieIcfgContainer [2020-07-21 13:56:51,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:56:51,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:56:51,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:56:51,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:56:51,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:56:50" (1/3) ... [2020-07-21 13:56:51,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afe2dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:56:51, skipping insertion in model container [2020-07-21 13:56:51,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:51" (2/3) ... [2020-07-21 13:56:51,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afe2dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:56:51, skipping insertion in model container [2020-07-21 13:56:51,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:56:51" (3/3) ... [2020-07-21 13:56:51,664 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_security.c [2020-07-21 13:56:51,676 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:56:51,683 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:56:51,694 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:56:51,716 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:56:51,716 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:56:51,716 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:56:51,717 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:56:51,717 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:56:51,717 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:56:51,717 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:56:51,717 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:56:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-07-21 13:56:51,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 13:56:51,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:56:51,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:56:51,745 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:56:51,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:56:51,750 INFO L82 PathProgramCache]: Analyzing trace with hash -105811556, now seen corresponding path program 1 times [2020-07-21 13:56:51,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:56:51,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735612777] [2020-07-21 13:56:51,758 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:51,837 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:56:51,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:56:51,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 13:56:51,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:56:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:56:51,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:56:51,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735612777] [2020-07-21 13:56:51,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:56:51,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 13:56:51,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351419702] [2020-07-21 13:56:51,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 13:56:51,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:56:51,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 13:56:51,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 13:56:51,894 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 2 states. [2020-07-21 13:56:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:56:51,926 INFO L93 Difference]: Finished difference Result 160 states and 298 transitions. [2020-07-21 13:56:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 13:56:51,927 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-21 13:56:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:56:51,940 INFO L225 Difference]: With dead ends: 160 [2020-07-21 13:56:51,940 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 13:56:51,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 13:56:51,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 13:56:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-21 13:56:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 13:56:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 113 transitions. [2020-07-21 13:56:51,988 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 113 transitions. Word has length 13 [2020-07-21 13:56:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:56:51,989 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 113 transitions. [2020-07-21 13:56:51,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 13:56:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 113 transitions. [2020-07-21 13:56:51,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 13:56:51,991 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:56:51,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:56:52,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:52,206 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:56:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:56:52,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1547300989, now seen corresponding path program 1 times [2020-07-21 13:56:52,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:56:52,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242285905] [2020-07-21 13:56:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:52,260 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:56:52,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:56:52,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:56:52,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:56:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:56:52,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:56:52,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242285905] [2020-07-21 13:56:52,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:56:52,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:56:52,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882514287] [2020-07-21 13:56:52,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:56:52,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:56:52,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:56:52,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:52,305 INFO L87 Difference]: Start difference. First operand 78 states and 113 transitions. Second operand 3 states. [2020-07-21 13:56:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:56:52,450 INFO L93 Difference]: Finished difference Result 157 states and 232 transitions. [2020-07-21 13:56:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:56:52,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 13:56:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:56:52,453 INFO L225 Difference]: With dead ends: 157 [2020-07-21 13:56:52,454 INFO L226 Difference]: Without dead ends: 85 [2020-07-21 13:56:52,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-21 13:56:52,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-07-21 13:56:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 13:56:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2020-07-21 13:56:52,480 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 14 [2020-07-21 13:56:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:56:52,480 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2020-07-21 13:56:52,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:56:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2020-07-21 13:56:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 13:56:52,485 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:56:52,485 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:56:52,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:52,687 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:56:52,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:56:52,688 INFO L82 PathProgramCache]: Analyzing trace with hash 555004895, now seen corresponding path program 1 times [2020-07-21 13:56:52,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:56:52,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707198391] [2020-07-21 13:56:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:52,739 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:56:52,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:56:52,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:56:52,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:56:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:56:52,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:56:52,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707198391] [2020-07-21 13:56:52,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:56:52,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:56:52,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212675089] [2020-07-21 13:56:52,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:56:52,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:56:52,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:56:52,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:52,777 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand 3 states. [2020-07-21 13:56:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:56:52,849 INFO L93 Difference]: Finished difference Result 155 states and 224 transitions. [2020-07-21 13:56:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:56:52,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 13:56:52,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:56:52,851 INFO L225 Difference]: With dead ends: 155 [2020-07-21 13:56:52,851 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 13:56:52,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 13:56:52,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-21 13:56:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 13:56:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-07-21 13:56:52,861 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 19 [2020-07-21 13:56:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:56:52,862 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-07-21 13:56:52,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:56:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-07-21 13:56:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 13:56:52,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:56:52,864 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:56:53,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:53,077 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:56:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:56:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash -624681896, now seen corresponding path program 1 times [2020-07-21 13:56:53,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:56:53,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914805018] [2020-07-21 13:56:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:53,134 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:56:53,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:56:53,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:56:53,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:56:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:56:53,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:56:53,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914805018] [2020-07-21 13:56:53,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:56:53,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:56:53,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906072681] [2020-07-21 13:56:53,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:56:53,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:56:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:56:53,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:53,160 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 3 states. [2020-07-21 13:56:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:56:53,278 INFO L93 Difference]: Finished difference Result 196 states and 285 transitions. [2020-07-21 13:56:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:56:53,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 13:56:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:56:53,282 INFO L225 Difference]: With dead ends: 196 [2020-07-21 13:56:53,283 INFO L226 Difference]: Without dead ends: 126 [2020-07-21 13:56:53,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:53,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-21 13:56:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2020-07-21 13:56:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-21 13:56:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 158 transitions. [2020-07-21 13:56:53,310 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 158 transitions. Word has length 22 [2020-07-21 13:56:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:56:53,310 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 158 transitions. [2020-07-21 13:56:53,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:56:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 158 transitions. [2020-07-21 13:56:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 13:56:53,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:56:53,312 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:56:53,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:53,516 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:56:53,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:56:53,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1531598883, now seen corresponding path program 1 times [2020-07-21 13:56:53,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:56:53,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007657467] [2020-07-21 13:56:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:53,546 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:56:53,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:56:53,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:56:53,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:56:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:56:53,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:56:53,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007657467] [2020-07-21 13:56:53,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:56:53,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:56:53,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225844672] [2020-07-21 13:56:53,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:56:53,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:56:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:56:53,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:53,560 INFO L87 Difference]: Start difference. First operand 112 states and 158 transitions. Second operand 3 states. [2020-07-21 13:56:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:56:53,621 INFO L93 Difference]: Finished difference Result 193 states and 275 transitions. [2020-07-21 13:56:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:56:53,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 13:56:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:56:53,626 INFO L225 Difference]: With dead ends: 193 [2020-07-21 13:56:53,626 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 13:56:53,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 13:56:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-07-21 13:56:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 13:56:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 130 transitions. [2020-07-21 13:56:53,645 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 130 transitions. Word has length 23 [2020-07-21 13:56:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:56:53,645 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 130 transitions. [2020-07-21 13:56:53,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:56:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 130 transitions. [2020-07-21 13:56:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 13:56:53,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:56:53,650 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:56:53,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:53,851 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:56:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:56:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash -576284788, now seen corresponding path program 1 times [2020-07-21 13:56:53,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:56:53,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600682144] [2020-07-21 13:56:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:53,882 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:56:53,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:56:53,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:56:53,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:56:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 13:56:53,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:56:53,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600682144] [2020-07-21 13:56:53,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:56:53,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:56:53,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32508774] [2020-07-21 13:56:53,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:56:53,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:56:53,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:56:53,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:53,904 INFO L87 Difference]: Start difference. First operand 95 states and 130 transitions. Second operand 3 states. [2020-07-21 13:56:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:56:53,953 INFO L93 Difference]: Finished difference Result 144 states and 203 transitions. [2020-07-21 13:56:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:56:53,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-21 13:56:53,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:56:53,956 INFO L225 Difference]: With dead ends: 144 [2020-07-21 13:56:53,956 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 13:56:53,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 13:56:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-07-21 13:56:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 13:56:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2020-07-21 13:56:53,975 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 29 [2020-07-21 13:56:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:56:53,976 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2020-07-21 13:56:53,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:56:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2020-07-21 13:56:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 13:56:53,984 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:56:53,984 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:56:54,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:54,198 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:56:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:56:54,199 INFO L82 PathProgramCache]: Analyzing trace with hash -31288535, now seen corresponding path program 1 times [2020-07-21 13:56:54,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:56:54,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594386514] [2020-07-21 13:56:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:54,237 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:56:54,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:56:54,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:56:54,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:56:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 13:56:54,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:56:54,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594386514] [2020-07-21 13:56:54,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:56:54,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:56:54,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003812890] [2020-07-21 13:56:54,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:56:54,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:56:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:56:54,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:54,258 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand 3 states. [2020-07-21 13:56:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:56:54,334 INFO L93 Difference]: Finished difference Result 165 states and 237 transitions. [2020-07-21 13:56:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:56:54,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-21 13:56:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:56:54,336 INFO L225 Difference]: With dead ends: 165 [2020-07-21 13:56:54,336 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 13:56:54,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 13:56:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2020-07-21 13:56:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 13:56:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 147 transitions. [2020-07-21 13:56:54,345 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 147 transitions. Word has length 30 [2020-07-21 13:56:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:56:54,346 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 147 transitions. [2020-07-21 13:56:54,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:56:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 147 transitions. [2020-07-21 13:56:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 13:56:54,347 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:56:54,348 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:56:54,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:54,561 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:56:54,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:56:54,562 INFO L82 PathProgramCache]: Analyzing trace with hash 180888733, now seen corresponding path program 1 times [2020-07-21 13:56:54,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:56:54,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723345845] [2020-07-21 13:56:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:54,590 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:56:54,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:56:54,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:56:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:56:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 13:56:54,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:56:54,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723345845] [2020-07-21 13:56:54,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:56:54,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:56:54,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200561400] [2020-07-21 13:56:54,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:56:54,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:56:54,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:56:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:54,609 INFO L87 Difference]: Start difference. First operand 106 states and 147 transitions. Second operand 3 states. [2020-07-21 13:56:54,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:56:54,677 INFO L93 Difference]: Finished difference Result 173 states and 241 transitions. [2020-07-21 13:56:54,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:56:54,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-21 13:56:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:56:54,681 INFO L225 Difference]: With dead ends: 173 [2020-07-21 13:56:54,681 INFO L226 Difference]: Without dead ends: 99 [2020-07-21 13:56:54,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-21 13:56:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-07-21 13:56:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 13:56:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2020-07-21 13:56:54,704 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 31 [2020-07-21 13:56:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:56:54,705 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2020-07-21 13:56:54,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:56:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2020-07-21 13:56:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 13:56:54,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:56:54,709 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:56:54,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:54,910 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:56:54,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:56:54,911 INFO L82 PathProgramCache]: Analyzing trace with hash 317242888, now seen corresponding path program 1 times [2020-07-21 13:56:54,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:56:54,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012349406] [2020-07-21 13:56:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:54,943 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:56:54,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:56:54,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:56:54,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:56:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 13:56:54,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:56:54,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012349406] [2020-07-21 13:56:54,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:56:54,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:56:54,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439404400] [2020-07-21 13:56:54,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:56:54,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:56:54,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:56:54,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:54,957 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand 3 states. [2020-07-21 13:56:54,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:56:54,994 INFO L93 Difference]: Finished difference Result 148 states and 196 transitions. [2020-07-21 13:56:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:56:54,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-21 13:56:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:56:54,996 INFO L225 Difference]: With dead ends: 148 [2020-07-21 13:56:54,996 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 13:56:54,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 13:56:55,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-21 13:56:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 13:56:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2020-07-21 13:56:55,004 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 31 [2020-07-21 13:56:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:56:55,004 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2020-07-21 13:56:55,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:56:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2020-07-21 13:56:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 13:56:55,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:56:55,006 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:56:55,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:55,220 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:56:55,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:56:55,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1695196396, now seen corresponding path program 1 times [2020-07-21 13:56:55,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:56:55,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988375325] [2020-07-21 13:56:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:55,263 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:56:55,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:56:55,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:56:55,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:56:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 13:56:55,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:56:55,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988375325] [2020-07-21 13:56:55,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:56:55,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:56:55,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636409201] [2020-07-21 13:56:55,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:56:55,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:56:55,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:56:55,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:55,301 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand 3 states. [2020-07-21 13:56:55,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:56:55,354 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-07-21 13:56:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:56:55,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-07-21 13:56:55,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:56:55,356 INFO L225 Difference]: With dead ends: 83 [2020-07-21 13:56:55,356 INFO L226 Difference]: Without dead ends: 79 [2020-07-21 13:56:55,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-21 13:56:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-07-21 13:56:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 13:56:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-07-21 13:56:55,364 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 32 [2020-07-21 13:56:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:56:55,367 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-07-21 13:56:55,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:56:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-07-21 13:56:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 13:56:55,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:56:55,369 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:56:55,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:55,575 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:56:55,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:56:55,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1000030502, now seen corresponding path program 1 times [2020-07-21 13:56:55,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:56:55,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623703924] [2020-07-21 13:56:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:55,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:56:55,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:56:55,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:56:55,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:56:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 13:56:55,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:56:55,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623703924] [2020-07-21 13:56:55,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:56:55,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:56:55,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78870486] [2020-07-21 13:56:55,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:56:55,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:56:55,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:56:55,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:55,630 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 3 states. [2020-07-21 13:56:55,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:56:55,658 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2020-07-21 13:56:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:56:55,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-21 13:56:55,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:56:55,659 INFO L225 Difference]: With dead ends: 122 [2020-07-21 13:56:55,659 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 13:56:55,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:56:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 13:56:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 13:56:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 13:56:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 13:56:55,660 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-07-21 13:56:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:56:55,661 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 13:56:55,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:56:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 13:56:55,661 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 13:56:55,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:56:55,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 13:56:56,083 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 13:56:56,084 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 13:56:56,084 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:56:56,084 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:56:56,084 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 13:56:56,084 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 13:56:56,084 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 13:56:56,085 INFO L268 CegarLoopResult]: For program point L316(lines 316 331) no Hoare annotation was computed. [2020-07-21 13:56:56,085 INFO L268 CegarLoopResult]: For program point L283(lines 283 382) no Hoare annotation was computed. [2020-07-21 13:56:56,085 INFO L268 CegarLoopResult]: For program point L250(lines 250 261) no Hoare annotation was computed. [2020-07-21 13:56:56,085 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 390) no Hoare annotation was computed. [2020-07-21 13:56:56,085 INFO L268 CegarLoopResult]: For program point L184(lines 184 199) no Hoare annotation was computed. [2020-07-21 13:56:56,085 INFO L268 CegarLoopResult]: For program point L118(lines 118 129) no Hoare annotation was computed. [2020-07-21 13:56:56,085 INFO L268 CegarLoopResult]: For program point L366(lines 366 377) no Hoare annotation was computed. [2020-07-21 13:56:56,085 INFO L268 CegarLoopResult]: For program point L300(lines 300 315) no Hoare annotation was computed. [2020-07-21 13:56:56,085 INFO L268 CegarLoopResult]: For program point L234(lines 234 245) no Hoare annotation was computed. [2020-07-21 13:56:56,085 INFO L268 CegarLoopResult]: For program point L102(lines 102 113) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L350(lines 350 361) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L284(lines 284 299) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L218(lines 218 229) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L86(lines 86 88) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L334(lines 334 345) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L202(lines 202 213) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L70(lines 70 72) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L318(lines 318 329) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L186(lines 186 197) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L54(lines 54 56) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L302(lines 302 313) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 390) no Hoare annotation was computed. [2020-07-21 13:56:56,086 INFO L268 CegarLoopResult]: For program point L170(lines 170 172) no Hoare annotation was computed. [2020-07-21 13:56:56,087 INFO L268 CegarLoopResult]: For program point L286(lines 286 297) no Hoare annotation was computed. [2020-07-21 13:56:56,087 INFO L268 CegarLoopResult]: For program point L154(lines 154 156) no Hoare annotation was computed. [2020-07-21 13:56:56,087 INFO L264 CegarLoopResult]: At program point L22-2(lines 22 385) the Hoare annotation is: (let ((.cse0 (<= main_~this_state~0 0))) (or (and (<= 3 main_~q~0) (= 2 main_~this_state~0) (<= main_~q~0 3)) (and (<= 4 main_~q~0) (= 3 main_~this_state~0)) (and (<= main_~q~0 2) (<= 2 main_~q~0) .cse0) (and .cse0 (<= main_~q~0 0)))) [2020-07-21 13:56:56,087 INFO L268 CegarLoopResult]: For program point L22-3(lines 22 385) no Hoare annotation was computed. [2020-07-21 13:56:56,087 INFO L268 CegarLoopResult]: For program point L270(lines 270 272) no Hoare annotation was computed. [2020-07-21 13:56:56,087 INFO L268 CegarLoopResult]: For program point L138(lines 138 140) no Hoare annotation was computed. [2020-07-21 13:56:56,088 INFO L268 CegarLoopResult]: For program point L254(lines 254 256) no Hoare annotation was computed. [2020-07-21 13:56:56,088 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-07-21 13:56:56,088 INFO L268 CegarLoopResult]: For program point L370(lines 370 372) no Hoare annotation was computed. [2020-07-21 13:56:56,088 INFO L268 CegarLoopResult]: For program point L238(lines 238 240) no Hoare annotation was computed. [2020-07-21 13:56:56,088 INFO L268 CegarLoopResult]: For program point L106(lines 106 108) no Hoare annotation was computed. [2020-07-21 13:56:56,088 INFO L268 CegarLoopResult]: For program point L354(lines 354 356) no Hoare annotation was computed. [2020-07-21 13:56:56,088 INFO L268 CegarLoopResult]: For program point L222(lines 222 224) no Hoare annotation was computed. [2020-07-21 13:56:56,088 INFO L264 CegarLoopResult]: At program point L371(lines 13 390) the Hoare annotation is: false [2020-07-21 13:56:56,089 INFO L268 CegarLoopResult]: For program point L338(lines 338 340) no Hoare annotation was computed. [2020-07-21 13:56:56,089 INFO L268 CegarLoopResult]: For program point L206(lines 206 208) no Hoare annotation was computed. [2020-07-21 13:56:56,089 INFO L268 CegarLoopResult]: For program point L322(lines 322 324) no Hoare annotation was computed. [2020-07-21 13:56:56,089 INFO L268 CegarLoopResult]: For program point L190(lines 190 192) no Hoare annotation was computed. [2020-07-21 13:56:56,089 INFO L268 CegarLoopResult]: For program point L306(lines 306 308) no Hoare annotation was computed. [2020-07-21 13:56:56,089 INFO L268 CegarLoopResult]: For program point L290(lines 290 292) no Hoare annotation was computed. [2020-07-21 13:56:56,089 INFO L268 CegarLoopResult]: For program point L27(lines 27 46) no Hoare annotation was computed. [2020-07-21 13:56:56,090 INFO L268 CegarLoopResult]: For program point L28(lines 28 43) no Hoare annotation was computed. [2020-07-21 13:56:56,090 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 389) no Hoare annotation was computed. [2020-07-21 13:56:56,090 INFO L268 CegarLoopResult]: For program point L30(lines 30 41) no Hoare annotation was computed. [2020-07-21 13:56:56,090 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 390) the Hoare annotation is: true [2020-07-21 13:56:56,090 INFO L268 CegarLoopResult]: For program point L80(lines 80 95) no Hoare annotation was computed. [2020-07-21 13:56:56,090 INFO L268 CegarLoopResult]: For program point L47(lines 47 98) no Hoare annotation was computed. [2020-07-21 13:56:56,090 INFO L268 CegarLoopResult]: For program point L64(lines 64 79) no Hoare annotation was computed. [2020-07-21 13:56:56,091 INFO L268 CegarLoopResult]: For program point L48(lines 48 63) no Hoare annotation was computed. [2020-07-21 13:56:56,091 INFO L268 CegarLoopResult]: For program point L164(lines 164 179) no Hoare annotation was computed. [2020-07-21 13:56:56,091 INFO L268 CegarLoopResult]: For program point L148(lines 148 163) no Hoare annotation was computed. [2020-07-21 13:56:56,091 INFO L268 CegarLoopResult]: For program point L82(lines 82 93) no Hoare annotation was computed. [2020-07-21 13:56:56,091 INFO L268 CegarLoopResult]: For program point L264(lines 264 279) no Hoare annotation was computed. [2020-07-21 13:56:56,091 INFO L268 CegarLoopResult]: For program point L132(lines 132 147) no Hoare annotation was computed. [2020-07-21 13:56:56,091 INFO L268 CegarLoopResult]: For program point L99(lines 99 182) no Hoare annotation was computed. [2020-07-21 13:56:56,091 INFO L268 CegarLoopResult]: For program point L66(lines 66 77) no Hoare annotation was computed. [2020-07-21 13:56:56,092 INFO L268 CegarLoopResult]: For program point L248(lines 248 263) no Hoare annotation was computed. [2020-07-21 13:56:56,092 INFO L268 CegarLoopResult]: For program point L116(lines 116 131) no Hoare annotation was computed. [2020-07-21 13:56:56,092 INFO L268 CegarLoopResult]: For program point L50(lines 50 61) no Hoare annotation was computed. [2020-07-21 13:56:56,092 INFO L268 CegarLoopResult]: For program point L364(lines 364 379) no Hoare annotation was computed. [2020-07-21 13:56:56,092 INFO L268 CegarLoopResult]: For program point L232(lines 232 247) no Hoare annotation was computed. [2020-07-21 13:56:56,092 INFO L268 CegarLoopResult]: For program point L166(lines 166 177) no Hoare annotation was computed. [2020-07-21 13:56:56,092 INFO L268 CegarLoopResult]: For program point L100(lines 100 115) no Hoare annotation was computed. [2020-07-21 13:56:56,092 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-21 13:56:56,093 INFO L264 CegarLoopResult]: At program point L381(lines 22 385) the Hoare annotation is: (let ((.cse0 (<= main_~this_state~0 0))) (or (and (<= 3 main_~q~0) (= 2 main_~this_state~0) (<= main_~q~0 3)) (and (<= 4 main_~q~0) (= 3 main_~this_state~0)) (and (<= main_~q~0 2) (<= 2 main_~q~0) .cse0) (and .cse0 (<= main_~q~0 0)))) [2020-07-21 13:56:56,093 INFO L268 CegarLoopResult]: For program point L348(lines 348 363) no Hoare annotation was computed. [2020-07-21 13:56:56,093 INFO L268 CegarLoopResult]: For program point L216(lines 216 231) no Hoare annotation was computed. [2020-07-21 13:56:56,093 INFO L268 CegarLoopResult]: For program point L183(lines 183 282) no Hoare annotation was computed. [2020-07-21 13:56:56,093 INFO L268 CegarLoopResult]: For program point L150(lines 150 161) no Hoare annotation was computed. [2020-07-21 13:56:56,093 INFO L268 CegarLoopResult]: For program point L332(lines 332 347) no Hoare annotation was computed. [2020-07-21 13:56:56,093 INFO L268 CegarLoopResult]: For program point L266(lines 266 277) no Hoare annotation was computed. [2020-07-21 13:56:56,094 INFO L268 CegarLoopResult]: For program point L200(lines 200 215) no Hoare annotation was computed. [2020-07-21 13:56:56,094 INFO L268 CegarLoopResult]: For program point L134(lines 134 145) no Hoare annotation was computed. [2020-07-21 13:56:56,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:56:56 BoogieIcfgContainer [2020-07-21 13:56:56,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:56:56,116 INFO L168 Benchmark]: Toolchain (without parser) took 5534.38 ms. Allocated memory was 137.9 MB in the beginning and 248.0 MB in the end (delta: 110.1 MB). Free memory was 101.5 MB in the beginning and 174.1 MB in the end (delta: -72.6 MB). Peak memory consumption was 37.5 MB. Max. memory is 7.1 GB. [2020-07-21 13:56:56,117 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 13:56:56,118 INFO L168 Benchmark]: CACSL2BoogieTranslator took 465.62 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 101.0 MB in the beginning and 180.3 MB in the end (delta: -79.2 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-07-21 13:56:56,119 INFO L168 Benchmark]: Boogie Preprocessor took 62.33 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 178.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-21 13:56:56,119 INFO L168 Benchmark]: RCFGBuilder took 539.10 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 149.3 MB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:56:56,120 INFO L168 Benchmark]: TraceAbstraction took 4456.46 ms. Allocated memory was 201.9 MB in the beginning and 248.0 MB in the end (delta: 46.1 MB). Free memory was 149.3 MB in the beginning and 174.1 MB in the end (delta: -24.8 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2020-07-21 13:56:56,124 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 465.62 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 101.0 MB in the beginning and 180.3 MB in the end (delta: -79.2 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.33 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 178.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 539.10 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 149.3 MB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4456.46 ms. Allocated memory was 201.9 MB in the beginning and 248.0 MB in the end (delta: 46.1 MB). Free memory was 149.3 MB in the beginning and 174.1 MB in the end (delta: -24.8 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 389]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((3 <= q && 2 == this_state) && q <= 3) || (4 <= q && 3 == this_state)) || ((q <= 2 && 2 <= q) && this_state <= 0)) || (this_state <= 0 && q <= 0) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((3 <= q && 2 == this_state) && q <= 3) || (4 <= q && 3 == this_state)) || ((q <= 2 && 2 <= q) && this_state <= 0)) || (this_state <= 0 && q <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1006 SDtfs, 364 SDslu, 444 SDs, 0 SdLazy, 232 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 28 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 15 NumberOfFragments, 75 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 42 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 277 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 266 ConstructedInterpolants, 0 QuantifiedInterpolants, 10696 SizeOfPredicates, 8 NumberOfNonLiveVariables, 757 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 55/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...