/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:16:08,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:16:08,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:16:08,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:16:08,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:16:08,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:16:08,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:16:08,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:16:08,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:16:08,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:16:08,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:16:08,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:16:08,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:16:08,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:16:08,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:16:08,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:16:08,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:16:08,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:16:08,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:16:08,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:16:08,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:16:08,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:16:08,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:16:08,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:16:08,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:16:08,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:16:08,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:16:08,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:16:08,863 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 [2020-07-19 23:16:08,894 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:16:08,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:16:08,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:16:08,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:16:08,898 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:16:08,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:16:08,899 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:16:08,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:16:08,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:16:08,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:16:08,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:16:08,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:16:08,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:16:08,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:16:08,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:16:08,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:16:08,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:16:08,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:16:08,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:16:08,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:16:08,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:16:08,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:16:08,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:16:08,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:16:08,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:16:08,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:16:08,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:16:08,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:16:08,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:16:08,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:16:09,208 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:16:09,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:16:09,226 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:16:09,227 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:16:09,228 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:16:09,228 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-19 23:16:09,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/113d89109/9bf8c8d601fd465090736f1d5d3bb788/FLAG7a0d80d30 [2020-07-19 23:16:09,787 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:16:09,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-19 23:16:09,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/113d89109/9bf8c8d601fd465090736f1d5d3bb788/FLAG7a0d80d30 [2020-07-19 23:16:10,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/113d89109/9bf8c8d601fd465090736f1d5d3bb788 [2020-07-19 23:16:10,134 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:16:10,136 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:16:10,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:16:10,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:16:10,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:16:10,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:16:10" (1/1) ... [2020-07-19 23:16:10,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@539a3883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:10, skipping insertion in model container [2020-07-19 23:16:10,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:16:10" (1/1) ... [2020-07-19 23:16:10,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:16:10,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:16:10,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:16:10,346 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:16:10,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:16:10,378 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:16:10,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:10 WrapperNode [2020-07-19 23:16:10,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:16:10,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:16:10,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:16:10,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:16:10,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:10" (1/1) ... [2020-07-19 23:16:10,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:10" (1/1) ... [2020-07-19 23:16:10,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:10" (1/1) ... [2020-07-19 23:16:10,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:10" (1/1) ... [2020-07-19 23:16:10,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:10" (1/1) ... [2020-07-19 23:16:10,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:10" (1/1) ... [2020-07-19 23:16:10,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:10" (1/1) ... [2020-07-19 23:16:10,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:16:10,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:16:10,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:16:10,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:16:10,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:10" (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 [2020-07-19 23:16:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:16:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:16:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-19 23:16:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-19 23:16:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:16:10,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:16:10,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:16:10,574 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-19 23:16:10,574 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-19 23:16:10,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:16:10,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:16:10,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:16:10,767 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:16:10,768 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:16:10,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:16:10 BoogieIcfgContainer [2020-07-19 23:16:10,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:16:10,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:16:10,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:16:10,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:16:10,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:16:10" (1/3) ... [2020-07-19 23:16:10,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42006b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:16:10, skipping insertion in model container [2020-07-19 23:16:10,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:10" (2/3) ... [2020-07-19 23:16:10,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42006b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:16:10, skipping insertion in model container [2020-07-19 23:16:10,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:16:10" (3/3) ... [2020-07-19 23:16:10,783 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-07-19 23:16:10,796 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:16:10,810 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:16:10,826 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:16:10,860 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:16:10,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:16:10,861 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:16:10,861 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:16:10,861 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:16:10,861 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:16:10,862 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:16:10,862 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:16:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-19 23:16:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:16:10,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:10,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:10,916 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-19 23:16:10,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:10,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612880352] [2020-07-19 23:16:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:16:11,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612880352] [2020-07-19 23:16:11,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:16:11,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:16:11,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958944167] [2020-07-19 23:16:11,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:16:11,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:11,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:16:11,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:16:11,206 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-19 23:16:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:11,314 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-19 23:16:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:16:11,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 23:16:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:11,328 INFO L225 Difference]: With dead ends: 44 [2020-07-19 23:16:11,328 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:16:11,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:16:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:16:11,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 23:16:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 23:16:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-19 23:16:11,379 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-19 23:16:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:11,379 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-19 23:16:11,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:16:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-19 23:16:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 23:16:11,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:11,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:11,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:16:11,383 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:11,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:11,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-19 23:16:11,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:11,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332637087] [2020-07-19 23:16:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:16:11,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332637087] [2020-07-19 23:16:11,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:16:11,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:16:11,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231864764] [2020-07-19 23:16:11,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:16:11,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:11,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:16:11,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:16:11,459 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-19 23:16:11,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:11,523 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-19 23:16:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:16:11,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-19 23:16:11,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:11,525 INFO L225 Difference]: With dead ends: 36 [2020-07-19 23:16:11,526 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 23:16:11,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:16:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 23:16:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-19 23:16:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 23:16:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-19 23:16:11,537 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-19 23:16:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:11,538 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-19 23:16:11,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:16:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-19 23:16:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 23:16:11,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:11,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:11,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:16:11,541 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-19 23:16:11,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:11,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719555637] [2020-07-19 23:16:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:16:11,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719555637] [2020-07-19 23:16:11,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032297721] [2020-07-19 23:16:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1258ac3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:11,760 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1258ac3 issued 3 check-sat command(s) [2020-07-19 23:16:11,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:11,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:16:11,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:16:11,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:11,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-19 23:16:11,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062709675] [2020-07-19 23:16:11,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:16:11,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:11,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:16:11,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:16:11,859 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-19 23:16:12,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:12,097 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-19 23:16:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:16:12,098 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-19 23:16:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:12,100 INFO L225 Difference]: With dead ends: 58 [2020-07-19 23:16:12,100 INFO L226 Difference]: Without dead ends: 34 [2020-07-19 23:16:12,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:16:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-19 23:16:12,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-19 23:16:12,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-19 23:16:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-19 23:16:12,111 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-19 23:16:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:12,111 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-19 23:16:12,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:16:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-19 23:16:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 23:16:12,113 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:12,114 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:12,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:16:12,329 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:12,330 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-19 23:16:12,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:12,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163561142] [2020-07-19 23:16:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:16:12,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163561142] [2020-07-19 23:16:12,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760062380] [2020-07-19 23:16:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4562fa0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:12,465 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4562fa0 issued 3 check-sat command(s) [2020-07-19 23:16:12,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:12,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:16:12,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:16:12,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:12,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-19 23:16:12,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138548388] [2020-07-19 23:16:12,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:16:12,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:16:12,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:16:12,511 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-07-19 23:16:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:12,686 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-19 23:16:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:16:12,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-19 23:16:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:12,690 INFO L225 Difference]: With dead ends: 54 [2020-07-19 23:16:12,690 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 23:16:12,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:16:12,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 23:16:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-19 23:16:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 23:16:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-19 23:16:12,704 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-19 23:16:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:12,704 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-19 23:16:12,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:16:12,704 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-19 23:16:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-19 23:16:12,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:12,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:12,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:12,922 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:12,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:12,923 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-19 23:16:12,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:12,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666689359] [2020-07-19 23:16:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-19 23:16:13,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666689359] [2020-07-19 23:16:13,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137241411] [2020-07-19 23:16:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a78c7ae No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:13,064 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a78c7ae issued 3 check-sat command(s) [2020-07-19 23:16:13,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:13,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:16:13,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:16:13,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:13,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-19 23:16:13,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24271096] [2020-07-19 23:16:13,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:16:13,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:13,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:16:13,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:16:13,156 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-19 23:16:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:13,498 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-19 23:16:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:16:13,499 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-19 23:16:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:13,502 INFO L225 Difference]: With dead ends: 108 [2020-07-19 23:16:13,502 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 23:16:13,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:16:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 23:16:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-19 23:16:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-19 23:16:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-19 23:16:13,543 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-19 23:16:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:13,544 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-19 23:16:13,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:16:13,545 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-19 23:16:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 23:16:13,554 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:13,555 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:13,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:13,771 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:13,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-19 23:16:13,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:13,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618657584] [2020-07-19 23:16:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-19 23:16:13,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618657584] [2020-07-19 23:16:13,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143519843] [2020-07-19 23:16:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68d2984e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:13,985 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68d2984e issued 3 check-sat command(s) [2020-07-19 23:16:13,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:13,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:16:13,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-19 23:16:14,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:14,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-19 23:16:14,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416527886] [2020-07-19 23:16:14,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:16:14,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:14,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:16:14,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:16:14,076 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-07-19 23:16:14,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:14,518 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-19 23:16:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:16:14,519 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-07-19 23:16:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:14,522 INFO L225 Difference]: With dead ends: 180 [2020-07-19 23:16:14,522 INFO L226 Difference]: Without dead ends: 120 [2020-07-19 23:16:14,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:16:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-19 23:16:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-19 23:16:14,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-19 23:16:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-19 23:16:14,553 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-19 23:16:14,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:14,553 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-19 23:16:14,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:16:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-19 23:16:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-19 23:16:14,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:14,556 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:14,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:14,771 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:14,772 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-19 23:16:14,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:14,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678514779] [2020-07-19 23:16:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-19 23:16:14,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678514779] [2020-07-19 23:16:14,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329778300] [2020-07-19 23:16:14,976 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1fcc7879 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:15,030 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1fcc7879 issued 3 check-sat command(s) [2020-07-19 23:16:15,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:15,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:16:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-19 23:16:15,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:15,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-19 23:16:15,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534064922] [2020-07-19 23:16:15,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:16:15,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:15,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:16:15,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:16:15,149 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 14 states. [2020-07-19 23:16:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:15,699 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-07-19 23:16:15,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 23:16:15,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-19 23:16:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:15,703 INFO L225 Difference]: With dead ends: 258 [2020-07-19 23:16:15,703 INFO L226 Difference]: Without dead ends: 158 [2020-07-19 23:16:15,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:16:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-19 23:16:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-07-19 23:16:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-19 23:16:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-07-19 23:16:15,758 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-07-19 23:16:15,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:15,761 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-07-19 23:16:15,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:16:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-07-19 23:16:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-19 23:16:15,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:15,766 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:15,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 23:16:15,983 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:15,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times [2020-07-19 23:16:15,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:15,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54454468] [2020-07-19 23:16:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-07-19 23:16:16,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54454468] [2020-07-19 23:16:16,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907267728] [2020-07-19 23:16:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@489f1bec No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:16,298 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@489f1bec issued 4 check-sat command(s) [2020-07-19 23:16:16,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:16,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:16:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-19 23:16:16,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:16,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-07-19 23:16:16,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279578875] [2020-07-19 23:16:16,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:16:16,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:16,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:16:16,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:16:16,387 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 14 states. [2020-07-19 23:16:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:16,857 INFO L93 Difference]: Finished difference Result 244 states and 474 transitions. [2020-07-19 23:16:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 23:16:16,857 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-07-19 23:16:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:16,862 INFO L225 Difference]: With dead ends: 244 [2020-07-19 23:16:16,862 INFO L226 Difference]: Without dead ends: 123 [2020-07-19 23:16:16,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:16:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-19 23:16:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2020-07-19 23:16:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-19 23:16:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 154 transitions. [2020-07-19 23:16:16,893 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 154 transitions. Word has length 82 [2020-07-19 23:16:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:16,893 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 154 transitions. [2020-07-19 23:16:16,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:16:16,893 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 154 transitions. [2020-07-19 23:16:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-19 23:16:16,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:16,898 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:17,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:17,100 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:17,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 1 times [2020-07-19 23:16:17,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:17,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167959290] [2020-07-19 23:16:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 89 proven. 150 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-07-19 23:16:17,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167959290] [2020-07-19 23:16:17,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881018780] [2020-07-19 23:16:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9ca23fd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:17,533 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9ca23fd issued 4 check-sat command(s) [2020-07-19 23:16:17,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:17,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:16:17,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 49 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-07-19 23:16:17,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:17,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2020-07-19 23:16:17,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779828669] [2020-07-19 23:16:17,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:16:17,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:17,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:16:17,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:16:17,628 INFO L87 Difference]: Start difference. First operand 101 states and 154 transitions. Second operand 18 states. [2020-07-19 23:16:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:18,441 INFO L93 Difference]: Finished difference Result 238 states and 428 transitions. [2020-07-19 23:16:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 23:16:18,442 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 136 [2020-07-19 23:16:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:18,446 INFO L225 Difference]: With dead ends: 238 [2020-07-19 23:16:18,447 INFO L226 Difference]: Without dead ends: 135 [2020-07-19 23:16:18,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 23:16:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-19 23:16:18,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2020-07-19 23:16:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-19 23:16:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 160 transitions. [2020-07-19 23:16:18,461 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 160 transitions. Word has length 136 [2020-07-19 23:16:18,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:18,461 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 160 transitions. [2020-07-19 23:16:18,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:16:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 160 transitions. [2020-07-19 23:16:18,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-19 23:16:18,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:18,464 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:18,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:18,677 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:18,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:18,678 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 2 times [2020-07-19 23:16:18,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:18,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279100761] [2020-07-19 23:16:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 59 proven. 50 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-19 23:16:18,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279100761] [2020-07-19 23:16:18,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606938281] [2020-07-19 23:16:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31adff00 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:18,962 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31adff00 issued 4 check-sat command(s) [2020-07-19 23:16:18,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:18,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:16:18,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-19 23:16:19,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:19,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2020-07-19 23:16:19,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856489104] [2020-07-19 23:16:19,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:16:19,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:19,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:16:19,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:16:19,027 INFO L87 Difference]: Start difference. First operand 112 states and 160 transitions. Second operand 15 states. [2020-07-19 23:16:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:19,478 INFO L93 Difference]: Finished difference Result 228 states and 340 transitions. [2020-07-19 23:16:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 23:16:19,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2020-07-19 23:16:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:19,481 INFO L225 Difference]: With dead ends: 228 [2020-07-19 23:16:19,481 INFO L226 Difference]: Without dead ends: 129 [2020-07-19 23:16:19,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:16:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-19 23:16:19,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-07-19 23:16:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-19 23:16:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2020-07-19 23:16:19,493 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 95 [2020-07-19 23:16:19,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:19,494 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2020-07-19 23:16:19,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:16:19,494 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2020-07-19 23:16:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-19 23:16:19,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:19,496 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:19,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 23:16:19,712 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:19,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:19,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-07-19 23:16:19,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:19,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808376735] [2020-07-19 23:16:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-19 23:16:20,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808376735] [2020-07-19 23:16:20,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084860803] [2020-07-19 23:16:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44a93538 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:20,382 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44a93538 issued 4 check-sat command(s) [2020-07-19 23:16:20,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:20,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-19 23:16:20,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-19 23:16:20,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:20,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-19 23:16:20,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605300223] [2020-07-19 23:16:20,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 23:16:20,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 23:16:20,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:16:20,822 INFO L87 Difference]: Start difference. First operand 117 states and 163 transitions. Second operand 28 states. [2020-07-19 23:16:21,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:21,081 INFO L93 Difference]: Finished difference Result 127 states and 175 transitions. [2020-07-19 23:16:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 23:16:21,084 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-07-19 23:16:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:21,087 INFO L225 Difference]: With dead ends: 127 [2020-07-19 23:16:21,087 INFO L226 Difference]: Without dead ends: 123 [2020-07-19 23:16:21,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:16:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-19 23:16:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2020-07-19 23:16:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-19 23:16:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2020-07-19 23:16:21,110 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 109 [2020-07-19 23:16:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:21,110 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2020-07-19 23:16:21,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 23:16:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2020-07-19 23:16:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-19 23:16:21,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:21,113 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:21,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:21,323 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:21,324 INFO L82 PathProgramCache]: Analyzing trace with hash 648432456, now seen corresponding path program 1 times [2020-07-19 23:16:21,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:21,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661022450] [2020-07-19 23:16:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31119eb [2020-07-19 23:16:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 58 proven. 143 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-07-19 23:16:21,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661022450] [2020-07-19 23:16:21,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190328968] [2020-07-19 23:16:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3594dffe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:21,686 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3594dffe issued 3 check-sat command(s) [2020-07-19 23:16:21,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:21,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 23:16:21,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 49 proven. 166 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-07-19 23:16:21,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:21,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-07-19 23:16:21,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212555892] [2020-07-19 23:16:21,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:16:21,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:21,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:16:21,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:16:21,785 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand 16 states. [2020-07-19 23:16:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:22,141 INFO L93 Difference]: Finished difference Result 212 states and 310 transitions. [2020-07-19 23:16:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 23:16:22,142 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-07-19 23:16:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:22,143 INFO L225 Difference]: With dead ends: 212 [2020-07-19 23:16:22,143 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 23:16:22,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:16:22,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 23:16:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 23:16:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 23:16:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 23:16:22,147 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 137 [2020-07-19 23:16:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:22,148 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 23:16:22,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:16:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 23:16:22,148 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 23:16:22,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:22,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 23:16:22,967 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 7 [2020-07-19 23:16:23,289 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 15 [2020-07-19 23:16:23,636 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2020-07-19 23:16:23,640 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 23:16:23,640 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:16:23,641 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:16:23,641 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 23:16:23,641 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 23:16:23,641 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 23:16:23,642 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-19 23:16:23,642 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-19 23:16:23,643 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-19 23:16:23,643 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-19 23:16:23,643 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-19 23:16:23,643 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-19 23:16:23,646 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-19 23:16:23,646 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-19 23:16:23,646 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-19 23:16:23,646 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-19 23:16:23,646 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 2)) (= fibo2_~n |fibo2_#in~n|)) [2020-07-19 23:16:23,646 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-19 23:16:23,647 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#t~ret2| 1) (<= |fibo2_#in~n| 3) (<= 1 |fibo2_#t~ret2|) .cse0 (<= 3 fibo2_~n)) (and (<= 5 |fibo2_#in~n|) .cse0))) [2020-07-19 23:16:23,647 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-19 23:16:23,647 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-19 23:16:23,647 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-19 23:16:23,647 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-19 23:16:23,647 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-19 23:16:23,647 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-19 23:16:23,647 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2020-07-19 23:16:23,648 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-19 23:16:23,648 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (<= 1 |fibo1_#t~ret0|)) (.cse1 (<= |fibo1_#t~ret0| 1)) (.cse2 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 fibo1_~n) .cse1 .cse2 (<= |fibo1_#in~n| 3)) (and (<= |fibo1_#in~n| 2) .cse0 (< 1 fibo1_~n) .cse1 .cse2) (and (<= 3 |fibo1_#t~ret0|) (<= 5 fibo1_~n) (<= |fibo1_#t~ret0| 3) .cse2) (and (<= |fibo1_#in~n| 4) .cse2 (<= 4 |fibo1_#in~n|)) (and (<= 6 |fibo1_#in~n|) .cse2))) [2020-07-19 23:16:23,651 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-19 23:16:23,651 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-19 23:16:23,651 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-19 23:16:23,651 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-19 23:16:23,651 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-19 23:16:23,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:16:23 BoogieIcfgContainer [2020-07-19 23:16:23,660 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:16:23,663 INFO L168 Benchmark]: Toolchain (without parser) took 13526.80 ms. Allocated memory was 142.1 MB in the beginning and 366.5 MB in the end (delta: 224.4 MB). Free memory was 100.6 MB in the beginning and 269.6 MB in the end (delta: -169.0 MB). Peak memory consumption was 212.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:16:23,670 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 142.1 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-19 23:16:23,673 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.78 ms. Allocated memory is still 142.1 MB. Free memory was 100.2 MB in the beginning and 90.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:16:23,673 INFO L168 Benchmark]: Boogie Preprocessor took 25.51 ms. Allocated memory is still 142.1 MB. Free memory was 90.2 MB in the beginning and 88.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:16:23,674 INFO L168 Benchmark]: RCFGBuilder took 367.69 ms. Allocated memory was 142.1 MB in the beginning and 200.8 MB in the end (delta: 58.7 MB). Free memory was 88.9 MB in the beginning and 166.9 MB in the end (delta: -78.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:16:23,676 INFO L168 Benchmark]: TraceAbstraction took 12885.88 ms. Allocated memory was 200.8 MB in the beginning and 366.5 MB in the end (delta: 165.7 MB). Free memory was 166.2 MB in the beginning and 269.6 MB in the end (delta: -103.5 MB). Peak memory consumption was 219.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:16:23,682 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 142.1 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.78 ms. Allocated memory is still 142.1 MB. Free memory was 100.2 MB in the beginning and 90.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.51 ms. Allocated memory is still 142.1 MB. Free memory was 90.2 MB in the beginning and 88.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 367.69 ms. Allocated memory was 142.1 MB in the beginning and 200.8 MB in the end (delta: 58.7 MB). Free memory was 88.9 MB in the beginning and 166.9 MB in the end (delta: -78.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12885.88 ms. Allocated memory was 200.8 MB in the beginning and 366.5 MB in the end (delta: 165.7 MB). Free memory was 166.2 MB in the beginning and 269.6 MB in the end (delta: -103.5 MB). Peak memory consumption was 219.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.4s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 389 SDtfs, 464 SDslu, 3028 SDs, 0 SdLazy, 3077 SolverSat, 462 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1190 GetRequests, 965 SyntacticMatches, 9 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 139 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 449 PreInvPairs, 567 NumberOfFragments, 116 HoareAnnotationTreeSize, 449 FomulaSimplifications, 3023 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 3456 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 1517 NumberOfCodeBlocks, 1443 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1495 ConstructedInterpolants, 0 QuantifiedInterpolants, 296013 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1549 ConjunctsInSsa, 143 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 2292/3178 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...