/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/gcd_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:31:17,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:31:17,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:31:17,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 00:31:17,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:31:17,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:31:17,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:31:17,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:31:17,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:31:17,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:31:17,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:31:17,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:31:17,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:31:17,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:31:17,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:31:17,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:31:17,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:31:17,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:31:17,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:31:17,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:31:17,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:31:17,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:31:17,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:31:17,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:31:17,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:31:17,875 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 00:31:17,896 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:31:17,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:31:17,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:31:17,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:31:17,900 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:31:17,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:31:17,900 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:31:17,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:31:17,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:31:17,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:31:17,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:31:17,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:31:17,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:31:17,902 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:31:17,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:31:17,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:31:17,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:31:17,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:31:17,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:31:17,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:31:17,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:31:17,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:17,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:31:17,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:31:17,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:31:17,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:31:17,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:17,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:31:17,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:31:17,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:31:18,165 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:31:18,178 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:31:18,181 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:31:18,182 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:31:18,183 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:31:18,183 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_4.c [2020-07-21 00:31:18,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0930972fe/34d7ca32ffe8485aad90d08cd1780be1/FLAGc0ab4f809 [2020-07-21 00:31:18,638 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:31:18,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_4.c [2020-07-21 00:31:18,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0930972fe/34d7ca32ffe8485aad90d08cd1780be1/FLAGc0ab4f809 [2020-07-21 00:31:19,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0930972fe/34d7ca32ffe8485aad90d08cd1780be1 [2020-07-21 00:31:19,021 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:31:19,024 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:31:19,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:19,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:31:19,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:31:19,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:19" (1/1) ... [2020-07-21 00:31:19,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a926594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:19, skipping insertion in model container [2020-07-21 00:31:19,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:19" (1/1) ... [2020-07-21 00:31:19,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:31:19,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:31:19,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:19,214 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:31:19,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:19,242 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:31:19,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:19 WrapperNode [2020-07-21 00:31:19,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:19,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:31:19,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:31:19,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:31:19,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:19" (1/1) ... [2020-07-21 00:31:19,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:19" (1/1) ... [2020-07-21 00:31:19,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:19" (1/1) ... [2020-07-21 00:31:19,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:19" (1/1) ... [2020-07-21 00:31:19,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:19" (1/1) ... [2020-07-21 00:31:19,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:19" (1/1) ... [2020-07-21 00:31:19,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:19" (1/1) ... [2020-07-21 00:31:19,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:31:19,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:31:19,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:31:19,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:31:19,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:19,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:31:19,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:31:19,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 00:31:19,426 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-07-21 00:31:19,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:31:19,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:31:19,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:31:19,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 00:31:19,427 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-07-21 00:31:19,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:31:19,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:31:19,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:31:19,616 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:31:19,616 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 00:31:19,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:19 BoogieIcfgContainer [2020-07-21 00:31:19,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:31:19,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:31:19,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:31:19,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:31:19,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:19" (1/3) ... [2020-07-21 00:31:19,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3483f9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:19, skipping insertion in model container [2020-07-21 00:31:19,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:19" (2/3) ... [2020-07-21 00:31:19,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3483f9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:19, skipping insertion in model container [2020-07-21 00:31:19,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:19" (3/3) ... [2020-07-21 00:31:19,629 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-07-21 00:31:19,637 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:31:19,643 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:31:19,656 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:31:19,679 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:31:19,680 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:31:19,680 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:31:19,680 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:31:19,680 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:31:19,680 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:31:19,680 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:31:19,680 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:31:19,696 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-21 00:31:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 00:31:19,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:19,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:19,703 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:19,709 INFO L82 PathProgramCache]: Analyzing trace with hash 876608673, now seen corresponding path program 1 times [2020-07-21 00:31:19,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:19,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206307531] [2020-07-21 00:31:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:19,794 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:19,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:19,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:19,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:19,895 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 00:31:19,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:19,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206307531] [2020-07-21 00:31:19,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:19,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:31:19,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247287619] [2020-07-21 00:31:19,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:19,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:19,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:19,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:19,922 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-07-21 00:31:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:20,026 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2020-07-21 00:31:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:20,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-21 00:31:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:20,054 INFO L225 Difference]: With dead ends: 60 [2020-07-21 00:31:20,055 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 00:31:20,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:31:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 00:31:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-21 00:31:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 00:31:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-07-21 00:31:20,143 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 17 [2020-07-21 00:31:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:20,143 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-07-21 00:31:20,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-07-21 00:31:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 00:31:20,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:20,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:20,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:20,364 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:20,366 INFO L82 PathProgramCache]: Analyzing trace with hash 483581663, now seen corresponding path program 1 times [2020-07-21 00:31:20,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:20,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433852961] [2020-07-21 00:31:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:20,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:20,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:20,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:20,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:20,452 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 00:31:20,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:20,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433852961] [2020-07-21 00:31:20,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:20,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:31:20,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496067464] [2020-07-21 00:31:20,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:20,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:20,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:20,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:20,458 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2020-07-21 00:31:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:20,510 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-21 00:31:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:20,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-21 00:31:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:20,513 INFO L225 Difference]: With dead ends: 42 [2020-07-21 00:31:20,513 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 00:31:20,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:31:20,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 00:31:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-21 00:31:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 00:31:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-21 00:31:20,522 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-07-21 00:31:20,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:20,522 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-21 00:31:20,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-21 00:31:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 00:31:20,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:20,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:20,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:20,740 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:20,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1158269966, now seen corresponding path program 1 times [2020-07-21 00:31:20,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:20,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414746338] [2020-07-21 00:31:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:20,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:20,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:20,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:20,814 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 00:31:20,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:20,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414746338] [2020-07-21 00:31:20,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:20,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:31:20,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760204169] [2020-07-21 00:31:20,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:20,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:20,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:20,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:20,817 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-07-21 00:31:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:20,869 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-21 00:31:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:20,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-21 00:31:20,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:20,871 INFO L225 Difference]: With dead ends: 46 [2020-07-21 00:31:20,871 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 00:31:20,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:31:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 00:31:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-21 00:31:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 00:31:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-21 00:31:20,879 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-07-21 00:31:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:20,880 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-21 00:31:20,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-21 00:31:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 00:31:20,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:20,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:21,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:21,095 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:21,097 INFO L82 PathProgramCache]: Analyzing trace with hash -457205388, now seen corresponding path program 1 times [2020-07-21 00:31:21,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:21,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341176196] [2020-07-21 00:31:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:21,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:21,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:21,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:21,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:21,155 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 00:31:21,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:21,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341176196] [2020-07-21 00:31:21,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:21,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:31:21,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455602819] [2020-07-21 00:31:21,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:21,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:21,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:21,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:21,158 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-07-21 00:31:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:21,206 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-21 00:31:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:21,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-21 00:31:21,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:21,208 INFO L225 Difference]: With dead ends: 40 [2020-07-21 00:31:21,208 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 00:31:21,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:31:21,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 00:31:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 00:31:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 00:31:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-21 00:31:21,216 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-07-21 00:31:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:21,216 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-21 00:31:21,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-21 00:31:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 00:31:21,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:21,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:21,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:21,433 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:21,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:21,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1431348209, now seen corresponding path program 1 times [2020-07-21 00:31:21,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:21,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314354833] [2020-07-21 00:31:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:21,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:21,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:21,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:31:21,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:31:21,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:31:21,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314354833] [2020-07-21 00:31:21,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:31:21,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-07-21 00:31:21,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210317385] [2020-07-21 00:31:21,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:21,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:21,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:21,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:31:21,618 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-07-21 00:31:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:21,664 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-07-21 00:31:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:21,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-21 00:31:21,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:21,666 INFO L225 Difference]: With dead ends: 44 [2020-07-21 00:31:21,666 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 00:31:21,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:31:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 00:31:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 00:31:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 00:31:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-21 00:31:21,678 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-07-21 00:31:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:21,678 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-21 00:31:21,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:21,678 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-21 00:31:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 00:31:21,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:21,682 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 00:31:21,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:21,885 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:21,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1537894100, now seen corresponding path program 1 times [2020-07-21 00:31:21,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:21,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865647575] [2020-07-21 00:31:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:21,908 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:21,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:21,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:31:21,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:31:22,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:22,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865647575] [2020-07-21 00:31:22,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:31:22,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-21 00:31:22,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599506536] [2020-07-21 00:31:22,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 00:31:22,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:22,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 00:31:22,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-21 00:31:22,193 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-07-21 00:31:24,323 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 00:31:24,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:24,388 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-21 00:31:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:31:24,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-07-21 00:31:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:24,390 INFO L225 Difference]: With dead ends: 48 [2020-07-21 00:31:24,390 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 00:31:24,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:31:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 00:31:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-21 00:31:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 00:31:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-21 00:31:24,399 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2020-07-21 00:31:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:24,399 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-21 00:31:24,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 00:31:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-21 00:31:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 00:31:24,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:24,401 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:24,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:24,606 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:24,608 INFO L82 PathProgramCache]: Analyzing trace with hash -849280247, now seen corresponding path program 2 times [2020-07-21 00:31:24,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:24,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409439934] [2020-07-21 00:31:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:24,635 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:24,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:24,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:31:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:31:24,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:24,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409439934] [2020-07-21 00:31:24,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:31:24,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 00:31:24,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630231753] [2020-07-21 00:31:24,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 00:31:24,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:24,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 00:31:24,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:31:24,915 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-07-21 00:31:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:25,129 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-07-21 00:31:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:31:25,133 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-21 00:31:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:25,134 INFO L225 Difference]: With dead ends: 50 [2020-07-21 00:31:25,135 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 00:31:25,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:31:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 00:31:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 00:31:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 00:31:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-21 00:31:25,142 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2020-07-21 00:31:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:25,143 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-21 00:31:25,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 00:31:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-21 00:31:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:31:25,144 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:25,144 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:25,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:25,348 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:25,349 INFO L82 PathProgramCache]: Analyzing trace with hash -516331098, now seen corresponding path program 3 times [2020-07-21 00:31:25,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:25,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976700031] [2020-07-21 00:31:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:25,372 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:25,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:25,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:31:25,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:31:25,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:25,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976700031] [2020-07-21 00:31:25,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:31:25,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 00:31:25,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511672933] [2020-07-21 00:31:25,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:31:25,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:25,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:31:25,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:31:25,647 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-07-21 00:31:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:25,814 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-07-21 00:31:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:31:25,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 00:31:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:25,816 INFO L225 Difference]: With dead ends: 52 [2020-07-21 00:31:25,816 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 00:31:25,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:31:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 00:31:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 00:31:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:31:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 00:31:25,822 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2020-07-21 00:31:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:25,822 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 00:31:25,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:31:25,823 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 00:31:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 00:31:25,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:25,824 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:26,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:26,028 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:26,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1878386625, now seen corresponding path program 4 times [2020-07-21 00:31:26,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:26,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914104355] [2020-07-21 00:31:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:26,062 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 00:31:26,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:31:26,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:26,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:26,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:26,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:26,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:26,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:26,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:26,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:31:29,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914104355] [2020-07-21 00:31:29,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:29,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-21 00:31:29,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765809996] [2020-07-21 00:31:29,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:31:29,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:29,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:31:29,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=335, Unknown=1, NotChecked=0, Total=380 [2020-07-21 00:31:29,835 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 20 states. [2020-07-21 00:31:31,477 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 10 [2020-07-21 00:31:37,708 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 00:31:41,841 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 00:31:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:43,029 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-07-21 00:31:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:31:43,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-07-21 00:31:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:43,034 INFO L225 Difference]: With dead ends: 52 [2020-07-21 00:31:43,036 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 00:31:43,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=84, Invalid=617, Unknown=1, NotChecked=0, Total=702 [2020-07-21 00:31:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 00:31:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 00:31:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 00:31:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-07-21 00:31:43,044 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 29 [2020-07-21 00:31:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:43,044 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-07-21 00:31:43,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:31:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-07-21 00:31:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 00:31:43,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:43,046 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:43,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:43,247 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash 841482334, now seen corresponding path program 5 times [2020-07-21 00:31:43,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:43,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858043377] [2020-07-21 00:31:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:31:43,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:43,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:43,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:31:43,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:31:43,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:43,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858043377] [2020-07-21 00:31:43,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:31:43,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 00:31:43,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520487276] [2020-07-21 00:31:43,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:31:43,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:43,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:31:43,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:31:43,664 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 9 states. [2020-07-21 00:31:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:50,002 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-07-21 00:31:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:31:50,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-21 00:31:50,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:50,006 INFO L225 Difference]: With dead ends: 54 [2020-07-21 00:31:50,006 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 00:31:50,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:31:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 00:31:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-21 00:31:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 00:31:50,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-07-21 00:31:50,012 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-07-21 00:31:50,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:50,012 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-07-21 00:31:50,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:31:50,013 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-07-21 00:31:50,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 00:31:50,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:50,014 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:50,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:50,218 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:50,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:50,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1492674782, now seen corresponding path program 6 times [2020-07-21 00:31:50,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:50,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749758130] [2020-07-21 00:31:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:50,260 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:50,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:50,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 00:31:50,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-21 00:31:50,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:50,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749758130] [2020-07-21 00:31:50,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:50,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 00:31:50,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035396082] [2020-07-21 00:31:50,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 00:31:50,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:50,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 00:31:50,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 00:31:50,271 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 3 states. [2020-07-21 00:31:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:50,293 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-07-21 00:31:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 00:31:50,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-21 00:31:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:50,295 INFO L225 Difference]: With dead ends: 51 [2020-07-21 00:31:50,295 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 00:31:50,296 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 00:31:50,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 00:31:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-21 00:31:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 00:31:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-07-21 00:31:50,301 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 31 [2020-07-21 00:31:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:50,301 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-07-21 00:31:50,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 00:31:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-07-21 00:31:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 00:31:50,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:50,302 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:50,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:50,516 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:50,517 INFO L82 PathProgramCache]: Analyzing trace with hash -202245895, now seen corresponding path program 7 times [2020-07-21 00:31:50,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:50,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588581392] [2020-07-21 00:31:50,518 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:50,544 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:50,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:50,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:31:50,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:31:51,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:52,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588581392] [2020-07-21 00:31:52,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:31:52,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-21 00:31:52,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511210287] [2020-07-21 00:31:52,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:31:52,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:31:52,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:31:52,040 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 12 states. [2020-07-21 00:31:53,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:53,109 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-07-21 00:31:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:31:53,115 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-07-21 00:31:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:53,116 INFO L225 Difference]: With dead ends: 63 [2020-07-21 00:31:53,116 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 00:31:53,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:31:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 00:31:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-21 00:31:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:31:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-07-21 00:31:53,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2020-07-21 00:31:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:53,123 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-07-21 00:31:53,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:31:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-07-21 00:31:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-21 00:31:53,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:53,124 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:53,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:53,336 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:53,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:53,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1486576746, now seen corresponding path program 8 times [2020-07-21 00:31:53,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:53,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637163243] [2020-07-21 00:31:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:53,369 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:53,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:53,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:31:53,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:56,078 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_gcd_test_~a_103 Int)) (and (<= (div (+ v_gcd_test_~a_103 (* |c_gcd_test_#in~a| (- 1))) (- 3)) |c_gcd_test_#in~b|) (<= (+ (* 2 v_gcd_test_~a_103) (div (+ (* v_gcd_test_~a_103 (- 1)) (* c_gcd_test_~b (- 1))) (- 3))) |c_gcd_test_#in~b|))) is different from true [2020-07-21 00:31:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2020-07-21 00:31:56,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:56,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637163243] [2020-07-21 00:31:56,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:31:56,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-21 00:31:56,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434498973] [2020-07-21 00:31:56,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:31:56,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:56,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:31:56,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=133, Unknown=1, NotChecked=22, Total=182 [2020-07-21 00:31:56,685 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 13 states. [2020-07-21 00:32:16,278 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 00:32:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:16,489 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-07-21 00:32:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:32:16,494 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-07-21 00:32:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:16,495 INFO L225 Difference]: With dead ends: 59 [2020-07-21 00:32:16,495 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 00:32:16,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=4, NotChecked=34, Total=380 [2020-07-21 00:32:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 00:32:16,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-21 00:32:16,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 00:32:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-07-21 00:32:16,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2020-07-21 00:32:16,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:16,507 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-07-21 00:32:16,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:32:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-07-21 00:32:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 00:32:16,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:16,508 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:16,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:16,709 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1222056691, now seen corresponding path program 9 times [2020-07-21 00:32:16,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:16,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308080024] [2020-07-21 00:32:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:16,741 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:16,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:16,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:32:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:32:18,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:18,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308080024] [2020-07-21 00:32:18,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:32:18,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-21 00:32:18,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107008136] [2020-07-21 00:32:18,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:32:18,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:18,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:32:18,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:32:18,674 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 14 states. [2020-07-21 00:32:35,591 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-07-21 00:32:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:38,953 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-07-21 00:32:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:32:38,962 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-07-21 00:32:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:38,963 INFO L225 Difference]: With dead ends: 63 [2020-07-21 00:32:38,964 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 00:32:38,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:32:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 00:32:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 00:32:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 00:32:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-07-21 00:32:38,974 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2020-07-21 00:32:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:38,976 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-07-21 00:32:38,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:32:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-07-21 00:32:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 00:32:38,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:38,978 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:39,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:39,181 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1468608272, now seen corresponding path program 10 times [2020-07-21 00:32:39,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:39,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126676633] [2020-07-21 00:32:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:39,215 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:39,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:39,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:32:39,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:33:05,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:33:05,782 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:33:08,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126676633] [2020-07-21 00:33:08,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:33:08,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-21 00:33:08,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410858786] [2020-07-21 00:33:08,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:33:08,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:33:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=169, Unknown=13, NotChecked=0, Total=210 [2020-07-21 00:33:08,081 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2020-07-21 00:33:51,097 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2020-07-21 00:33:57,680 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2020-07-21 00:34:04,291 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-07-21 00:34:12,115 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 00:34:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:23,324 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-07-21 00:34:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:34:23,364 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-07-21 00:34:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:23,365 INFO L225 Difference]: With dead ends: 62 [2020-07-21 00:34:23,365 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 00:34:23,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 48.6s TimeCoverageRelationStatistics Valid=74, Invalid=366, Unknown=22, NotChecked=0, Total=462 [2020-07-21 00:34:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 00:34:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-21 00:34:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 00:34:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-07-21 00:34:23,374 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 39 [2020-07-21 00:34:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:23,374 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-07-21 00:34:23,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:34:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-07-21 00:34:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 00:34:23,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:23,376 INFO L422 BasicCegarLoop]: trace histogram [11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:23,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:23,591 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:23,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2113490963, now seen corresponding path program 11 times [2020-07-21 00:34:23,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:23,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005664289] [2020-07-21 00:34:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:23,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:34:23,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 00:34:23,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:26,546 WARN L860 $PredicateComparison]: unable to prove that (exists ((gcd_test_~b Int)) (and (= 0 (mod (+ gcd_test_~b |c_gcd_test_#in~b|) 2)) (= |c_gcd_test_#in~a| (+ (* 3 gcd_test_~b) (* 7 (div (+ (* gcd_test_~b (- 1)) |c_gcd_test_#in~b|) 2)))) (not (= gcd_test_~b 0)))) is different from true [2020-07-21 00:34:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 66 not checked. [2020-07-21 00:34:26,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:26,756 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 00:34:27,732 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 00:34:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 00:34:31,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005664289] [2020-07-21 00:34:31,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:31,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 00:34:31,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826097489] [2020-07-21 00:34:31,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:34:31,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:31,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:34:31,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=229, Unknown=2, NotChecked=30, Total=306 [2020-07-21 00:34:31,840 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 18 states. [2020-07-21 00:34:32,350 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 7 [2020-07-21 00:34:35,115 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-07-21 00:34:41,980 WARN L193 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2020-07-21 00:34:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:42,133 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-07-21 00:34:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:34:42,150 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-07-21 00:34:42,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:42,150 INFO L225 Difference]: With dead ends: 48 [2020-07-21 00:34:42,150 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:34:42,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=69, Invalid=312, Unknown=3, NotChecked=36, Total=420 [2020-07-21 00:34:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:34:42,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:34:42,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:34:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:34:42,152 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-07-21 00:34:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:42,152 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:34:42,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:34:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:34:42,153 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:34:42,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:42,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:34:42,801 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 198 [2020-07-21 00:34:43,105 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2020-07-21 00:34:43,429 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-21 00:34:43,720 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-21 00:34:43,998 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-21 00:39:21,847 WARN L193 SmtUtils]: Spent 4.63 m on a formula simplification. DAG size of input: 201 DAG size of output: 86 [2020-07-21 00:39:21,861 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:39:21,862 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:39:21,862 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:39:21,862 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:39:21,862 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:39:21,862 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:39:21,862 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 30 46) the Hoare annotation is: true [2020-07-21 00:39:21,863 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 30 46) no Hoare annotation was computed. [2020-07-21 00:39:21,863 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-21 00:39:21,863 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (= 18 main_~y~0) (= (+ main_~g~0 54) main_~x~0) (= 63 main_~x~0)) [2020-07-21 00:39:21,863 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= 18 main_~y~0) (= (+ main_~g~0 54) main_~x~0) (= 63 main_~x~0)) [2020-07-21 00:39:21,863 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 30 46) no Hoare annotation was computed. [2020-07-21 00:39:21,863 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (= 18 main_~y~0) (= (+ main_~g~0 54) main_~x~0) (= 63 main_~x~0)) [2020-07-21 00:39:21,863 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (= 18 main_~y~0) (= 63 main_~x~0)) [2020-07-21 00:39:21,863 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-21 00:39:21,863 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-07-21 00:39:21,864 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-21 00:39:21,864 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-07-21 00:39:21,864 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-07-21 00:39:21,864 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-21 00:39:21,864 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2020-07-21 00:39:21,864 INFO L268 CegarLoopResult]: For program point gcd_testEXIT(lines 10 27) no Hoare annotation was computed. [2020-07-21 00:39:21,864 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 25) no Hoare annotation was computed. [2020-07-21 00:39:21,864 INFO L268 CegarLoopResult]: For program point L13-1(lines 11 27) no Hoare annotation was computed. [2020-07-21 00:39:21,864 INFO L271 CegarLoopResult]: At program point gcd_testENTRY(lines 10 27) the Hoare annotation is: true [2020-07-21 00:39:21,864 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 00:39:21,865 INFO L264 CegarLoopResult]: At program point L20-2(lines 19 25) the Hoare annotation is: (let ((.cse0 (+ gcd_test_~b gcd_test_~a)) (.cse1 (= |gcd_test_#in~a| (+ gcd_test_~a (* |gcd_test_#in~b| 3)))) (.cse2 (= gcd_test_~b |gcd_test_#in~b|))) (or (exists ((v_gcd_test_~a_65 Int)) (and (<= (+ |gcd_test_#in~b| 1) (* 2 v_gcd_test_~a_65)) (<= |gcd_test_#in~b| (div (+ (* v_gcd_test_~a_65 (- 1)) |gcd_test_#in~a|) 3)))) (exists ((v_gcd_test_~a_153 Int)) (and (<= (+ (* 2 v_gcd_test_~a_153) (div (* v_gcd_test_~a_153 (- 1)) (- 5))) |gcd_test_#in~b|) (<= (div (+ v_gcd_test_~a_153 (* |gcd_test_#in~a| (- 1))) (- 3)) |gcd_test_#in~b|))) (and (<= |gcd_test_#in~b| (div (+ (* gcd_test_~a (- 1)) |gcd_test_#in~a|) 3)) (<= (div (+ gcd_test_~a (* |gcd_test_#in~a| (- 1))) (- 3)) |gcd_test_#in~b|) (= .cse0 |gcd_test_#in~b|)) (exists ((gcd_test_~a Int)) (and (<= gcd_test_~a |gcd_test_#in~b|) (<= (div (+ gcd_test_~a (* |gcd_test_#in~a| (- 1))) (- 2)) |gcd_test_#in~b|))) (and .cse1 (<= (+ (* 3 gcd_test_~b) gcd_test_~a) |gcd_test_#in~a|) (<= |gcd_test_#in~b| gcd_test_~b)) (let ((.cse3 (+ (* 2 gcd_test_~b) gcd_test_~a))) (and .cse2 (<= .cse3 |gcd_test_#in~a|) (<= |gcd_test_#in~a| .cse3))) (exists ((gcd_test_~b Int)) (and (= 0 (mod (+ gcd_test_~b |gcd_test_#in~b|) 2)) (= (+ (* gcd_test_~b 3) (* (div (+ (* gcd_test_~b (- 1)) |gcd_test_#in~b|) 2) 7)) |gcd_test_#in~a|) (not (= gcd_test_~b 0)))) (and .cse2 (<= |gcd_test_#in~a| .cse0) (<= .cse0 |gcd_test_#in~a|)) (and (= 0 (mod (+ gcd_test_~b |gcd_test_#in~b|) 2)) (= (+ (* gcd_test_~b 3) (* (div (+ (* gcd_test_~b (- 1)) |gcd_test_#in~b|) 2) 7)) |gcd_test_#in~a|) .cse1) (<= |gcd_test_#in~a| |gcd_test_#in~b|) (and .cse2 (= gcd_test_~a |gcd_test_#in~a|)))) [2020-07-21 00:39:21,865 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-07-21 00:39:21,865 INFO L268 CegarLoopResult]: For program point L12-2(lines 11 27) no Hoare annotation was computed. [2020-07-21 00:39:21,865 INFO L268 CegarLoopResult]: For program point gcd_testFINAL(lines 10 27) no Hoare annotation was computed. [2020-07-21 00:39:21,877 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] [2020-07-21 00:39:21,878 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] [2020-07-21 00:39:21,879 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,879 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,879 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,880 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-21 00:39:21,880 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-21 00:39:21,880 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,881 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,881 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,881 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,890 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] [2020-07-21 00:39:21,891 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] [2020-07-21 00:39:21,893 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,893 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,894 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,894 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-21 00:39:21,894 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-21 00:39:21,895 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,895 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,895 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,895 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:39:21 BoogieIcfgContainer [2020-07-21 00:39:21,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:39:21,912 INFO L168 Benchmark]: Toolchain (without parser) took 482889.30 ms. Allocated memory was 146.3 MB in the beginning and 257.9 MB in the end (delta: 111.7 MB). Free memory was 104.3 MB in the beginning and 147.6 MB in the end (delta: -43.3 MB). Peak memory consumption was 68.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:39:21,914 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 00:39:21,915 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.99 ms. Allocated memory is still 146.3 MB. Free memory was 103.9 MB in the beginning and 94.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 00:39:21,915 INFO L168 Benchmark]: Boogie Preprocessor took 118.61 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 94.3 MB in the beginning and 182.2 MB in the end (delta: -87.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-21 00:39:21,916 INFO L168 Benchmark]: RCFGBuilder took 257.78 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 169.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-21 00:39:21,916 INFO L168 Benchmark]: TraceAbstraction took 482287.01 ms. Allocated memory was 203.4 MB in the beginning and 257.9 MB in the end (delta: 54.5 MB). Free memory was 168.8 MB in the beginning and 147.6 MB in the end (delta: 21.2 MB). Peak memory consumption was 75.7 MB. Max. memory is 7.1 GB. [2020-07-21 00:39:21,921 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 217.99 ms. Allocated memory is still 146.3 MB. Free memory was 103.9 MB in the beginning and 94.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.61 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 94.3 MB in the beginning and 182.2 MB in the end (delta: -87.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 257.78 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 169.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 482287.01 ms. Allocated memory was 203.4 MB in the beginning and 257.9 MB in the end (delta: 54.5 MB). Free memory was 168.8 MB in the beginning and 147.6 MB in the end (delta: 21.2 MB). Peak memory consumption was 75.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 19]: Loop Invariant [2020-07-21 00:39:21,934 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] [2020-07-21 00:39:21,934 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] [2020-07-21 00:39:21,939 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,940 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,940 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,940 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-21 00:39:21,940 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-21 00:39:21,941 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,941 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,941 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,941 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,943 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] [2020-07-21 00:39:21,943 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_65,QUANTIFIED] [2020-07-21 00:39:21,943 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,944 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,944 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_153,QUANTIFIED] [2020-07-21 00:39:21,944 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-21 00:39:21,944 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-21 00:39:21,945 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,945 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,945 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] [2020-07-21 00:39:21,945 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~b,QUANTIFIED] Derived loop invariant: ((((((((((\exists v_gcd_test_~a_65 : int :: \old(b) + 1 <= 2 * v_gcd_test_~a_65 && \old(b) <= (v_gcd_test_~a_65 * -1 + \old(a)) / 3) || (\exists v_gcd_test_~a_153 : int :: 2 * v_gcd_test_~a_153 + v_gcd_test_~a_153 * -1 / -5 <= \old(b) && (v_gcd_test_~a_153 + \old(a) * -1) / -3 <= \old(b))) || ((\old(b) <= (a * -1 + \old(a)) / 3 && (a + \old(a) * -1) / -3 <= \old(b)) && b + a == \old(b))) || (\exists gcd_test_~a : int :: gcd_test_~a <= \old(b) && (gcd_test_~a + \old(a) * -1) / -2 <= \old(b))) || ((\old(a) == a + \old(b) * 3 && 3 * b + a <= \old(a)) && \old(b) <= b)) || ((b == \old(b) && 2 * b + a <= \old(a)) && \old(a) <= 2 * b + a)) || (\exists gcd_test_~b : int :: (0 == (gcd_test_~b + \old(b)) % 2 && gcd_test_~b * 3 + (gcd_test_~b * -1 + \old(b)) / 2 * 7 == \old(a)) && !(gcd_test_~b == 0))) || ((b == \old(b) && \old(a) <= b + a) && b + a <= \old(a))) || ((0 == (b + \old(b)) % 2 && b * 3 + (b * -1 + \old(b)) / 2 * 7 == \old(a)) && \old(a) == a + \old(b) * 3)) || \old(a) <= \old(b)) || (b == \old(b) && a == \old(a)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 202.6s, OverallIterations: 16, TraceHistogramMax: 11, AutomataDifference: 149.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 279.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 353 SDtfs, 194 SDslu, 1899 SDs, 0 SdLazy, 1739 SolverSat, 73 SolverUnsat, 41 SolverUnknown, 0 SolverNotchecked, 94.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 614 GetRequests, 432 SyntacticMatches, 5 SemanticMatches, 177 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 95.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=15, 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, 16 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 58 PreInvPairs, 99 NumberOfFragments, 246 HoareAnnotationTreeSize, 58 FomulaSimplifications, 1167 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 520 FormulaSimplificationTreeSizeReductionInter, 279.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 49.1s InterpolantComputationTime, 444 NumberOfCodeBlocks, 330 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 516 ConstructedInterpolants, 67 QuantifiedInterpolants, 139518 SizeOfPredicates, 48 NumberOfNonLiveVariables, 787 ConjunctsInSsa, 178 ConjunctsInUnsatCore, 19 InterpolantComputations, 6 PerfectInterpolantSequences, 172/689 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...